US3790507A - Plastic bone composition - Google Patents
Plastic bone composition Download PDFInfo
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- US3790507A US3790507A US00060983A US3790507DA US3790507A US 3790507 A US3790507 A US 3790507A US 00060983 A US00060983 A US 00060983A US 3790507D A US3790507D A US 3790507DA US 3790507 A US3790507 A US 3790507A
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- 239000000203 mixture Substances 0.000 title abstract description 51
- 210000000988 bone and bone Anatomy 0.000 title abstract description 39
- 239000004033 plastic Substances 0.000 title description 17
- 229920003023 plastic Polymers 0.000 title description 17
- 239000007943 implant Substances 0.000 abstract description 24
- 239000011248 coating agent Substances 0.000 abstract description 19
- 238000000576 coating method Methods 0.000 abstract description 19
- 239000002184 metal Substances 0.000 abstract description 13
- 229910052751 metal Inorganic materials 0.000 abstract description 13
- 229920000058 polyacrylate Polymers 0.000 abstract description 11
- 239000004053 dental implant Substances 0.000 abstract description 10
- 150000002739 metals Chemical class 0.000 abstract description 7
- 230000000399 orthopedic effect Effects 0.000 abstract description 5
- 229920000193 polymethacrylate Polymers 0.000 abstract description 4
- 239000004615 ingredient Substances 0.000 abstract description 3
- 239000012528 membrane Substances 0.000 description 9
- 210000001519 tissue Anatomy 0.000 description 7
- 230000003239 periodontal effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 241001465754 Metazoa Species 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 241000283690 Bos taurus Species 0.000 description 1
- 206010061218 Inflammation Diseases 0.000 description 1
- 229910000771 Vitallium Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 210000002808 connective tissue Anatomy 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 208000031513 cyst Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 210000004195 gingiva Anatomy 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000001900 immune effect Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000004054 inflammatory process Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000002278 reconstructive surgery Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 210000003625 skull Anatomy 0.000 description 1
- 210000000332 tooth crown Anatomy 0.000 description 1
- 239000000602 vitallium Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
- C08L71/02—Polyalkylene oxides
- C08L71/03—Polyepihalohydrins
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0012—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
- A61C8/0028—Pins, needles; Head structures therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/28—Bones
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/40—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
- A61L27/44—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having a macromolecular matrix
- A61L27/46—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having a macromolecular matrix with phosphorus-containing inorganic fillers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S606/00—Surgery
- Y10S606/907—Composed of particular material or coated
Definitions
- a composition comprising as its basic ingredients a mixture of grated anorganic bone and an acrylic polymer, such as polymethacrylate, for use as dental implants, as well as for implants in other parts of the body, and as a coating for metals which may be implanted in the human body for dental purposes, orthopedic protheses, neurosurgery and others.
- an acrylic polymer such as polymethacrylate
- acrylic polymers have many characteristics that make them highly desirable for use as an artificial implant, which characteristics include the fact that this plastic material ap proaches a natural tooth in hardness and rigidity, is not adversely affected by the temperature conditions normally encountered in the human mouth, can be worked with facility to any desired shape, retains its color and composition, etc. Perhaps of even greater importance is the fact that it has been found that when an acrylic polymer is used for an artificial tooth replica implant a periodontal membrane forms around the base of the artificial implant much like that which exists around a natural tooth.
- This periodontal membrane is the structure that acts as a shock absorber, infection limiting mechanism and as a cellular reservoir, and the presence of such a membrane in an artificial implant is extremely important and desirable. It has been found that the membrane which forms about the acrylic polymer artificial implant distributes the forces exerted to the supporting tissues of the tooth in a nearnatural manner.
- the instant invention also has utility in overcoming certain disadvantages that exist where metal implants are used in the human body.
- Metal implants have traditionally been used for dental purposes, as well as in the field of orthopedics and neurosourgery, and one of the problems that exist in such metal implants is the fact that metals have corrosive actions in the presence of living tissues resulting in electrolytic currents being emitted which in turn results in resorptive and destructive phenomena. It is, therefore, desirable to coat such metallic implants 'with the plastic bone composition of the instant invention since, once so coated, the implant is resistant to abrasion and corrosion and hence is non-conductive of the aforeice said electrolytic currents. In addition, the plastic bone coating results in a better fibrous interlock between the metallic implant and the surrounding bone in a biologically acceptable manner.
- a further object is the provision of a composition which may be used in the formation of an artificial dental implant, said composition being such that When the artificial implant is mounted in an alveolar socket, a periodontal membrane will form about the roots of the implant much like the membrane which exists around the roots of a natural tooth.
- Another object is the provision of a plastic bone composition that may be used as a coating for metal implants.
- Still another object is the provision of a plastic bone composition that is structurally strong but yet has sulficient porosity to enable implants or inserts of said composition in the human body to effectively interlock with surrounding bone and other tissues.
- FIG. 1 is an elevational view of an artificial tooth constructed and mounted in accordance with the instant invention
- FIG. 2 is a top plan view of the supporting struts
- FIG. 3 is a section taken on line 3-3 of FIG. 2;
- FIG. 4 is a section taken on line 44 of FIG. 2;
- FIG. 5 is a detailed perspective of one of the supporting struts prior to being coated
- FIG. 6 is a detiled perspective of the strut shown in FIG. 5 after coating.
- FIG. 7 is a section taken on line 77 of FIG. 6.
- a composition comprising as its basic ingredients a mixture of an acrylic polymer and anorganic bone.
- the bone is grated or ground to powder form and then mixed with the polymer, which may be either a heat process or quick-setting plastic.
- Any suitable bone may be used, although in practice it has been found that Boplant (registered trademark of Squibb) and Kiel Bone (trademark of Unilab Surgicals) have proven to be highly satisfactory.
- Boplant and Kiel Bone are sterile processed, bovine bone or cartrilage commonly used for grafting procedures in orthopedic and reconstructive surgery.
- the plastic may be polymethacrylate, polymethylmethacrylate, or any other acrylic polymer having substantially the same characteristics.
- the acrylic polymer in the above mixture imparts rigidity and strength to the composition, wherein its architectural shape is maintained; and, as previously mentioned, acr'ylic polymer, such as polyrnethacrylate, has substantially the strength, color, stability, and temperature characteristics exhibited by natural teeth which, of course, are of extreme importance when the instant composition is used as an artificial dental implant.
- acr'ylic polymer such as polyrnethacrylate
- the anorganic bone in the mixture is degrading and resorptive, thus imparting additional porosity to the composition.
- the composition becomes more porous as resorption of the bone takes place.
- composition of the instant invention Since the composition of the instant invention has been developed for use as a dental implant and for implanting in other parts of the body as well, it is obviously importaut that the proper proportion of bone and plastic be employed in the mixture. To this end it has been found that when the bone comprises more than 30 percent by weight of the mixture, immunological rejection phenomenom begins to appear. When, however, less than 30 percent by weight of bone is in the mixture, then the heterograft reaction that is found when bone from one animal is implanted into another animal is absent; and, accordingly, this composition of this invention comprises a maximum of 30 percent by weight of bone in the mixture.
- Additional porosity may be obtained by the use of foaming agents in the mixture, not to exceed percent of the mixture by weight.
- compositions above described have the quality of enabling connective tissue fibers to penetrate and form an actual network within its structure, thus bonding or uniting to its host in a biologically acceptable manner. As previously stated, it is the resorption of the bone in the mixture that creates the porosity that permits the aforesaid fibrous interlock to take place.
- an artificial dental implant constructed of my composition has the highly desirable feature of forming a periodental membrane much like that which exists with a natural tooth. It should be noted, however, that this composition is not limited to use as a dental implant but rather may be used as a substitute for human tissue wherever necessary and desirable, such as to fill defects or holes in the brain, skull or the like. Expressed ditferently, my composition. may be used as a replacement for depleted bone throughout the body, such as in cranioplastics and cysts. In addition, this composition is highly desirable for use as a. coating material for metals that are used throughout the body for orthopedic prothesis.
- each pin 14 comprises an enlarged point at front end 16, an enlarged cylindrical rear end 18 and a reduced shaft portion 20 extending therebetween.
- the shaft portion 20 is provided with a plurality of notches 22 for promoting a stronger bond between the reduced shaft portion 20 and coating 24 which extends therearound.
- the coating 24 consists of the plastic bone composition of the instant invention, and it will be noted that the coating is substantially flush with enlarged portions 16 and 18.
- the pin 14 may be of any desired metal
- three pins 14 are provided, said pins being inserted into specially provided bores in bone 26 so that the non-coated portion 18 of the pins 14 is above the upper surface of the gingiva 28 and is embedded within the crown 10.
- the struts 14 diverge from crown 10 in a tripod arrangement so as to provide a firm mounting for the crown, although other supporting arrangements could obviously be used.
- coating 24 is advantageous for a num ber of reasons. As previously stated, the porosity of the plastic bone composition which makes up the coating 24 results in a better fibrous interlock between the coating and the surrounding periodental tissues. In addition, the presence of coating 24 prevents the usual corrosive action which takes place when metals are in the presence of living tissues. Thus, the presence of coating 24 prevents emission of microwaves of electrolytic current and the resorptive and destructive phenomenom which results therefrom. Also, the presence of coating results in minimal inflammation and excellent giugival health.
- a plastic bone composition consisting essentially of grated anorganic bone and polymethylmethacrylate, there being sufficient bone in the mixture to substantially increase the porosity thereof, but the proportion of said bone in the mixture not exceeding 30% by Weight.
- composition of claim 1 containing 20 to 22 percent by weight of grated anorganic bone and 78 to 80 percent by weight of polymethylmethacrylate.
- composition of claim 1 additionally containing approximately 10 percent by weight of a foaming agent.
- composition of claim 1 in combination with a metal member, said composition being in the form of a coating cover said member.
Abstract
A COMPOSITION COMPRISING AS ITS BASIC INGREDIENTS A MIXTURE OF GRATED ANORGANIC BONE AND AN ACRYLIC POLYMER, SUCH AS POLYMETHACRYLATE, FOR USE AS DENTAL IMPLANTS, AS WELL AS FOR IMPLANTS IN OTHER PARTS OF THE BODY, AND AS A COATING FOR METALS WHICH MAY BY IMPLANTED IN THE HUMAN BODY FOR DENTAL PURPOSES, ORTHOPEDIC PROTHESES, NEUROSURGERY AND OTHERS.
Description
Feb. 5, M HODQSH PLASTiC BONE COMPOSITiON Original Filed March 10. 1969 F l G. 3
F l G. l
F I G. 7
United States Patent 3,790,507 PLASTIC BONE CONIPOSITION Milton Hodosh, Providence, R.I., assignor to Research Corporation, New York, N.Y.
Original application Mar. 10, 1969, Ser. No. 805,400, now Patent No. 3,609,867, dated Oct. 5, 1971. Divided and this application July 6, 1970, Ser. No. 60,983
Int. Cl. C08f 45/04, 47/10 U.S. Cl. 260-2.5 R 4 Claims ABSTRACT OF THE DISCLOSURE A composition comprising as its basic ingredients a mixture of grated anorganic bone and an acrylic polymer, such as polymethacrylate, for use as dental implants, as well as for implants in other parts of the body, and as a coating for metals which may be implanted in the human body for dental purposes, orthopedic protheses, neurosurgery and others.
BACKGROUND OF THE INVENTION This is a division of application Ser. No. 805,400, filed Mar. 10, 1969, now U.S. Pat. No. 3,609,867.
It is well known in the dental art to utilize an acrylic polymer, such as polymethacrylate, for example, in the making of denture bases, and, also artificial implants have heretofore been made of this material. These acrylic polymers have many characteristics that make them highly desirable for use as an artificial implant, which characteristics include the fact that this plastic material ap proaches a natural tooth in hardness and rigidity, is not adversely affected by the temperature conditions normally encountered in the human mouth, can be worked with facility to any desired shape, retains its color and composition, etc. Perhaps of even greater importance is the fact that it has been found that when an acrylic polymer is used for an artificial tooth replica implant a periodontal membrane forms around the base of the artificial implant much like that which exists around a natural tooth. This periodontal membrane is the structure that acts as a shock absorber, infection limiting mechanism and as a cellular reservoir, and the presence of such a membrane in an artificial implant is extremely important and desirable. It has been found that the membrane which forms about the acrylic polymer artificial implant distributes the forces exerted to the supporting tissues of the tooth in a nearnatural manner.
One of the problems that has existed in connection with acrylic polymer dental implants is the fact that the fibrous interlock between the artificial implant and its periodontal membrane is not as deep and penetrating as that which exists with a natural tooth, nor is the pattern of interlock the same. The instant invention overcomes this deficiency and achieves a more effective interlock by more closely approaching the interlock which exists with a natural tooth, thus forming a more healthy periodontal membrane and a more firm and secure mounting of the artificial implant in the alveolar socket.
The instant invention also has utility in overcoming certain disadvantages that exist where metal implants are used in the human body. Metal implants have traditionally been used for dental purposes, as well as in the field of orthopedics and neurosourgery, and one of the problems that exist in such metal implants is the fact that metals have corrosive actions in the presence of living tissues resulting in electrolytic currents being emitted which in turn results in resorptive and destructive phenomena. It is, therefore, desirable to coat such metallic implants 'with the plastic bone composition of the instant invention since, once so coated, the implant is resistant to abrasion and corrosion and hence is non-conductive of the aforeice said electrolytic currents. In addition, the plastic bone coating results in a better fibrous interlock between the metallic implant and the surrounding bone in a biologically acceptable manner.
SUMMARY OF THE INVENTION It is therefore a primary object of the instant invention to provide a composition of matter for use as an implant in the human body wherein the implant is biologically accepted by the surrounding tissues and interlocks therewith in a firm and natural manner.
A further object is the provision of a composition which may be used in the formation of an artificial dental implant, said composition being such that When the artificial implant is mounted in an alveolar socket, a periodontal membrane will form about the roots of the implant much like the membrane which exists around the roots of a natural tooth.
Another object is the provision of a plastic bone composition that may be used as a coating for metal implants.
Still another object is the provision of a plastic bone composition that is structurally strong but yet has sulficient porosity to enable implants or inserts of said composition in the human body to effectively interlock with surrounding bone and other tissues.
DESCRIPTION OF THE DRAWINGS In the drawings which illustrate the best mode presently contemplated for carrying out the present invention:
FIG. 1 is an elevational view of an artificial tooth constructed and mounted in accordance with the instant invention;
FIG. 2 is a top plan view of the supporting struts;
FIG. 3 is a section taken on line 3-3 of FIG. 2;
FIG. 4 is a section taken on line 44 of FIG. 2;
FIG. 5 is a detailed perspective of one of the supporting struts prior to being coated;
FIG. 6 is a detiled perspective of the strut shown in FIG. 5 after coating; and
FIG. 7 is a section taken on line 77 of FIG. 6.
DESCRIPTION OF THE INVENTION In carrying out the aforestated objectives, a composition has been provided comprising as its basic ingredients a mixture of an acrylic polymer and anorganic bone. The bone is grated or ground to powder form and then mixed with the polymer, which may be either a heat process or quick-setting plastic. Any suitable bone may be used, although in practice it has been found that Boplant (registered trademark of Squibb) and Kiel Bone (trademark of Unilab Surgicals) have proven to be highly satisfactory. Boplant and Kiel Bone are sterile processed, bovine bone or cartrilage commonly used for grafting procedures in orthopedic and reconstructive surgery. The plastic may be polymethacrylate, polymethylmethacrylate, or any other acrylic polymer having substantially the same characteristics.
The acrylic polymer in the above mixture imparts rigidity and strength to the composition, wherein its architectural shape is maintained; and, as previously mentioned, acr'ylic polymer, such as polyrnethacrylate, has substantially the strength, color, stability, and temperature characteristics exhibited by natural teeth which, of course, are of extreme importance when the instant composition is used as an artificial dental implant. On the other hand, the anorganic bone in the mixture is degrading and resorptive, thus imparting additional porosity to the composition. Thus, the composition becomes more porous as resorption of the bone takes place.
Since the composition of the instant invention has been developed for use as a dental implant and for implanting in other parts of the body as well, it is obviously importaut that the proper proportion of bone and plastic be employed in the mixture. To this end it has been found that when the bone comprises more than 30 percent by weight of the mixture, immunological rejection phenomenom begins to appear. When, however, less than 30 percent by weight of bone is in the mixture, then the heterograft reaction that is found when bone from one animal is implanted into another animal is absent; and, accordingly, this composition of this invention comprises a maximum of 30 percent by weight of bone in the mixture. On the other hand, it is desirable that there be sufiicient bone in the mixture so that the desired porosity will exist in the composition, and, hence, it has been found that a mixture comprising 20 percent to 22. percent by Weight of bone and 78 percent to 80 percent by weight of acrylic polymer provides the best results.
Additional porosity may be obtained by the use of foaming agents in the mixture, not to exceed percent of the mixture by weight.
The compositions above described have the quality of enabling connective tissue fibers to penetrate and form an actual network within its structure, thus bonding or uniting to its host in a biologically acceptable manner. As previously stated, it is the resorption of the bone in the mixture that creates the porosity that permits the aforesaid fibrous interlock to take place.
When these compositions are used as an artificial dental implant, the teeth replica implant is placed in the existing alveolar socket as soon after extraction of the natural tooth as possible. As previously stated, an artificial dental implant constructed of my composition has the highly desirable feature of forming a periodental membrane much like that which exists with a natural tooth. It should be noted, however, that this composition is not limited to use as a dental implant but rather may be used as a substitute for human tissue wherever necessary and desirable, such as to fill defects or holes in the brain, skull or the like. Expressed ditferently, my composition. may be used as a replacement for depleted bone throughout the body, such as in cranioplastics and cysts. In addition, this composition is highly desirable for use as a. coating material for metals that are used throughout the body for orthopedic prothesis.
Referring to the drawings, there is shown in FIGS. 14 an artificial tooth crown 10 and mounted in the gum 12 by means of metallic pins or struts shown generally at 14. As will be seen most clearly in FIGS. 5-7, each pin 14 comprises an enlarged point at front end 16, an enlarged cylindrical rear end 18 and a reduced shaft portion 20 extending therebetween. The shaft portion 20 is provided with a plurality of notches 22 for promoting a stronger bond between the reduced shaft portion 20 and coating 24 which extends therearound. The coating 24 consists of the plastic bone composition of the instant invention, and it will be noted that the coating is substantially flush with enlarged portions 16 and 18. One of the desirable features of the plastic bone composition of the instant invention is the fact that it has the capacity and ability of bonding firmly to metals, although, as aforestated, the secureness of the bond is enhanced by the provision of the notches 22. The pin 14 may be of any desired metal,
although when used as a dental implant, it has been found that vitallium is desirable and satisfactory. Also, it is possible to completely coat a pin similar to pin 14,
in which event it would not be necessary to have reduced shaft portion 20.
As will be seen most clearly in FIGS. 24, three pins 14 are provided, said pins being inserted into specially provided bores in bone 26 so that the non-coated portion 18 of the pins 14 is above the upper surface of the gingiva 28 and is embedded within the crown 10. The struts 14 diverge from crown 10 in a tripod arrangement so as to provide a firm mounting for the crown, although other supporting arrangements could obviously be used.
The presence of coating 24 is advantageous for a num ber of reasons. As previously stated, the porosity of the plastic bone composition which makes up the coating 24 results in a better fibrous interlock between the coating and the surrounding periodental tissues. In addition, the presence of coating 24 prevents the usual corrosive action which takes place when metals are in the presence of living tissues. Thus, the presence of coating 24 prevents emission of microwaves of electrolytic current and the resorptive and destructive phenomenom which results therefrom. Also, the presence of coating results in minimal inflammation and excellent giugival health.
Although the use of the instant invention as a coating for a metallic pin used for dental purposes has been illustrated and described, it will be understood that other metallic implants and inserts in the human body will likewise benefit from the presence of a coating of this this plastic bone composition. Thus, digits and limbs may be made from a combination of metals having this plastic bone coating. These may surgically ha ve ligamentous attachments, and movements may be effected by bioengineering aids.
What is claimed is:
1. A plastic bone composition consisting essentially of grated anorganic bone and polymethylmethacrylate, there being sufficient bone in the mixture to substantially increase the porosity thereof, but the proportion of said bone in the mixture not exceeding 30% by Weight.
2. The composition of claim 1 containing 20 to 22 percent by weight of grated anorganic bone and 78 to 80 percent by weight of polymethylmethacrylate.
3. The composition of claim 1 additionally containing approximately 10 percent by weight of a foaming agent.
4. The composition of claim 1 in combination with a metal member, said composition being in the form of a coating cover said member.
References Cited UNITED STATES PATENTS 3,390,456 7/ 1968 Delava 106-35 3,469,317 9/1969 Jarby 10635 2,968,593 1/1961 Rapkin 128-1 R FOREIGN PATENTS 718,685 '1 l/'4 Great Britain 32-10 OTHER REFERENCES Experiments Suggest Man Might Grow a New Hearth, Washington Sunday Post, Sept. 22, 1968.
WILBERT J. BRIGGS, 8a., Primary Examiner US. Cl. X.R.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US80540069A | 1969-03-10 | 1969-03-10 | |
US6098370A | 1970-07-06 | 1970-07-06 |
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US3790507A true US3790507A (en) | 1974-02-05 |
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US00060983A Expired - Lifetime US3790507A (en) | 1969-03-10 | 1970-07-06 | Plastic bone composition |
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Cited By (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3892648A (en) * | 1974-04-16 | 1975-07-01 | Us Navy | Electrochemical deposition of bone |
US3906550A (en) * | 1973-12-27 | 1975-09-23 | William Rostoker | Prosthetic device having a porous fiber metal structure |
US3918100A (en) * | 1974-05-13 | 1975-11-11 | Us Navy | Sputtering of bone on prostheses |
US3955280A (en) * | 1972-10-18 | 1976-05-11 | Meer Sneer | Dental implants |
US3986212A (en) * | 1975-04-11 | 1976-10-19 | Glasrock Products, Inc. | Composite prosthetic device with porous polymeric coating |
FR2350827A1 (en) * | 1976-05-12 | 1977-12-09 | Battelle Institut E V | ANCHORING DEVICE FOR DENTAL ENDOPROTHESES SUBJECT TO A SIGNIFICANT EFFORT AND PROCEDURE FOR ITS MANUFACTURING |
US4146936A (en) * | 1975-12-30 | 1979-04-03 | Sumitomo Chemical Company Limited | Implants for bones, joints and tooth roots |
US4199864A (en) * | 1975-12-22 | 1980-04-29 | Arthur Ashman | Endosseous plastic implant method |
WO1981000670A1 (en) * | 1979-09-10 | 1981-03-19 | Massachusetts Inst Technology | Pre-coated body implant |
US4279598A (en) * | 1976-07-06 | 1981-07-21 | Scheicher Hans M F | Dental half-implants |
US4281420A (en) * | 1979-02-15 | 1981-08-04 | Raab S | Bone connective prostheses adapted to maximize strength and durability of prostheses-bone cement interface; and methods of forming same |
US4291013A (en) * | 1978-10-09 | 1981-09-22 | Merck Patent Gesellschaft Mit Beschrankter Haftung | Medicinally useful, shaped mass of collagen resorbable in the body |
US4314380A (en) * | 1980-09-26 | 1982-02-09 | Koken Co., Ltd. | Artificial bone |
US4322398A (en) * | 1978-02-20 | 1982-03-30 | Battelle Institut E.V. | Implantable drug depot and process for the production thereof |
US4365359A (en) * | 1979-02-15 | 1982-12-28 | Raab S | PMMA Coated bone connective prostheses and method of forming same |
US4501031A (en) * | 1981-01-22 | 1985-02-26 | Zimmer, Inc. | Metal and plastic composite tibial component for knee joint |
US4585458A (en) * | 1981-06-10 | 1986-04-29 | Kurland Kenneth Z | Means and method of implanting bioprosthetics |
US4778388A (en) * | 1986-11-07 | 1988-10-18 | Sankin Kogyo Kabushiki Kaisha | Root canal posts |
WO1989000410A1 (en) * | 1987-07-15 | 1989-01-26 | Team, Inc. | Improved dental implant and method |
US4888018A (en) * | 1988-12-27 | 1989-12-19 | Giampapa Vincent C | Method of positioning and securing a chin implant |
US4990090A (en) * | 1988-11-18 | 1991-02-05 | Roane James B | Endodontic post construction |
US5122132A (en) * | 1991-08-01 | 1992-06-16 | Bremer Medical, Inc. | Skull pin with enhanced shear resistance |
US5643268A (en) * | 1994-09-27 | 1997-07-01 | Brainlab Med. Computersysteme Gmbh | Fixation pin for fixing a reference system to bony structures |
US5816811A (en) * | 1993-11-10 | 1998-10-06 | Implant Innovations, Inc. | Surgically implantable prosthetic devices |
US5899939A (en) * | 1998-01-21 | 1999-05-04 | Osteotech, Inc. | Bone-derived implant for load-supporting applications |
US6123731A (en) * | 1998-02-06 | 2000-09-26 | Osteotech, Inc. | Osteoimplant and method for its manufacture |
US6258091B1 (en) | 1996-02-14 | 2001-07-10 | Walter Lorenz Surgical Inc. | Bone fastener and instrument for insertion thereof |
US6270500B1 (en) | 1996-02-03 | 2001-08-07 | Karl-Dieter Lerch | Device for postoperative fixation back into the cranium of a plug of bone removed therefrom during a surgical operation |
US6334891B1 (en) | 1992-10-16 | 2002-01-01 | Norian Corporation | Paste compositions capable of setting into carbonated apatite |
US6379363B1 (en) | 1999-09-24 | 2002-04-30 | Walter Lorenz Surgical, Inc. | Method and apparatus for reattachment of a cranial flap using a cranial clamp |
US6491723B1 (en) | 1996-02-27 | 2002-12-10 | Implant Innovations, Inc. | Implant surface preparation method |
US20030009235A1 (en) * | 2000-07-19 | 2003-01-09 | Albert Manrique | Osteoimplant and method of making same |
US20030130736A1 (en) * | 2001-10-24 | 2003-07-10 | Simon Raab | Bone connective prosthesis and method of forming same |
US6652765B1 (en) | 1994-11-30 | 2003-11-25 | Implant Innovations, Inc. | Implant surface preparation |
US6685707B2 (en) | 2001-09-25 | 2004-02-03 | Walter Lorenz Surgical, Inc. | Cranial clamp and method for fixating a bone plate |
US20040265780A1 (en) * | 2003-05-16 | 2004-12-30 | Robb T. Tait | Surface treatment process for implants made of titanium alloy |
US20070000802A1 (en) * | 2005-06-21 | 2007-01-04 | Cervitech, Inc. | Holder for intervertebral prostheses |
US20070088437A1 (en) * | 2003-06-11 | 2007-04-19 | Betz Randal R | Osteoimplants and methods for their manufacture |
US20070108162A1 (en) * | 1994-11-30 | 2007-05-17 | Beaty Keith D | Implant surface preparation |
US20080063671A1 (en) * | 2005-11-02 | 2008-03-13 | Morris John W | Hemostatic bone graft |
US20080145392A1 (en) * | 2001-10-12 | 2008-06-19 | David Knaack | Bone Graft |
US20090062798A1 (en) * | 2006-11-06 | 2009-03-05 | Janet Conway | Internal bone transport |
US20100055646A1 (en) * | 2007-04-12 | 2010-03-04 | Daguo Zhao | Bionic dental implant |
US20100239634A1 (en) * | 2008-10-24 | 2010-09-23 | Shimp Lawrence A | Compositions and methods for promoting bone formation |
US7939108B2 (en) | 2000-12-14 | 2011-05-10 | Osteotech, Inc. | Method of making demineralized bone particles |
US8002813B2 (en) | 1999-10-15 | 2011-08-23 | Warsaw Orthopedic, Inc. | Volume maintaining osteoinductive/osteoconductive compositions |
US8221499B2 (en) | 1994-11-30 | 2012-07-17 | Biomet 3I, Llc | Infection-blocking dental implant |
US9289275B2 (en) | 2010-10-21 | 2016-03-22 | Daguo Zhao | Bionic tooth implant, and base and sub-root thereof |
US20170172710A1 (en) * | 2014-12-19 | 2017-06-22 | Paul Hertz | Dental Implant System |
-
1970
- 1970-07-06 US US00060983A patent/US3790507A/en not_active Expired - Lifetime
Cited By (91)
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US3955280A (en) * | 1972-10-18 | 1976-05-11 | Meer Sneer | Dental implants |
US3906550A (en) * | 1973-12-27 | 1975-09-23 | William Rostoker | Prosthetic device having a porous fiber metal structure |
US3892648A (en) * | 1974-04-16 | 1975-07-01 | Us Navy | Electrochemical deposition of bone |
US3918100A (en) * | 1974-05-13 | 1975-11-11 | Us Navy | Sputtering of bone on prostheses |
US3986212A (en) * | 1975-04-11 | 1976-10-19 | Glasrock Products, Inc. | Composite prosthetic device with porous polymeric coating |
US4199864A (en) * | 1975-12-22 | 1980-04-29 | Arthur Ashman | Endosseous plastic implant method |
US4146936A (en) * | 1975-12-30 | 1979-04-03 | Sumitomo Chemical Company Limited | Implants for bones, joints and tooth roots |
FR2350827A1 (en) * | 1976-05-12 | 1977-12-09 | Battelle Institut E V | ANCHORING DEVICE FOR DENTAL ENDOPROTHESES SUBJECT TO A SIGNIFICANT EFFORT AND PROCEDURE FOR ITS MANUFACTURING |
US4202055A (en) * | 1976-05-12 | 1980-05-13 | Battelle-Institut E.V. | Anchorage for highly stressed endoprostheses |
US4279598A (en) * | 1976-07-06 | 1981-07-21 | Scheicher Hans M F | Dental half-implants |
US4347234A (en) * | 1978-01-09 | 1982-08-31 | Merck Patent Gesellschaft Mit Beschrankter Haftung | Medicinally useful, shaped mass of collagen resorbable in the body |
US4322398A (en) * | 1978-02-20 | 1982-03-30 | Battelle Institut E.V. | Implantable drug depot and process for the production thereof |
US4291013A (en) * | 1978-10-09 | 1981-09-22 | Merck Patent Gesellschaft Mit Beschrankter Haftung | Medicinally useful, shaped mass of collagen resorbable in the body |
US4281420A (en) * | 1979-02-15 | 1981-08-04 | Raab S | Bone connective prostheses adapted to maximize strength and durability of prostheses-bone cement interface; and methods of forming same |
US4336618A (en) * | 1979-02-15 | 1982-06-29 | Raab S | Bone connective prostheses adapted to maximize strength and durability of prostheses-bone cement interface; and methods of forming same |
US4365359A (en) * | 1979-02-15 | 1982-12-28 | Raab S | PMMA Coated bone connective prostheses and method of forming same |
WO1981000670A1 (en) * | 1979-09-10 | 1981-03-19 | Massachusetts Inst Technology | Pre-coated body implant |
US4283799A (en) * | 1979-09-10 | 1981-08-18 | Massachusetts Institute Of Technology | Pre-coated body implant |
US4314380A (en) * | 1980-09-26 | 1982-02-09 | Koken Co., Ltd. | Artificial bone |
US4501031A (en) * | 1981-01-22 | 1985-02-26 | Zimmer, Inc. | Metal and plastic composite tibial component for knee joint |
US4585458A (en) * | 1981-06-10 | 1986-04-29 | Kurland Kenneth Z | Means and method of implanting bioprosthetics |
US4778388A (en) * | 1986-11-07 | 1988-10-18 | Sankin Kogyo Kabushiki Kaisha | Root canal posts |
WO1989000410A1 (en) * | 1987-07-15 | 1989-01-26 | Team, Inc. | Improved dental implant and method |
US4872840A (en) * | 1987-07-15 | 1989-10-10 | Team Incorporated | Dental implant and method |
US4990090A (en) * | 1988-11-18 | 1991-02-05 | Roane James B | Endodontic post construction |
US4888018A (en) * | 1988-12-27 | 1989-12-19 | Giampapa Vincent C | Method of positioning and securing a chin implant |
US5122132A (en) * | 1991-08-01 | 1992-06-16 | Bremer Medical, Inc. | Skull pin with enhanced shear resistance |
US6334891B1 (en) | 1992-10-16 | 2002-01-01 | Norian Corporation | Paste compositions capable of setting into carbonated apatite |
US5816811A (en) * | 1993-11-10 | 1998-10-06 | Implant Innovations, Inc. | Surgically implantable prosthetic devices |
US5643268A (en) * | 1994-09-27 | 1997-07-01 | Brainlab Med. Computersysteme Gmbh | Fixation pin for fixing a reference system to bony structures |
US7550091B2 (en) | 1994-11-30 | 2009-06-23 | Biomet 3I, Llc | Implant surface preparation |
US7857987B2 (en) | 1994-11-30 | 2010-12-28 | Biomet 3I, Llc | Implant surface preparation |
US7547399B2 (en) | 1994-11-30 | 2009-06-16 | Biomet 3I, Llc | Implant surface preparation |
US20080160168A1 (en) * | 1994-11-30 | 2008-07-03 | Beaty Keith D | Implant surface preparation |
US20080135521A1 (en) * | 1994-11-30 | 2008-06-12 | Beaty Keith D | Implant surface preparation |
US8221499B2 (en) | 1994-11-30 | 2012-07-17 | Biomet 3I, Llc | Infection-blocking dental implant |
US20070108162A1 (en) * | 1994-11-30 | 2007-05-17 | Beaty Keith D | Implant surface preparation |
US7169317B2 (en) | 1994-11-30 | 2007-01-30 | Implant Innovations, Inc. | Implant surface preparation |
US6969474B2 (en) | 1994-11-30 | 2005-11-29 | Implant Innovations, Inc. | Implant surface preparation |
US20040148031A1 (en) * | 1994-11-30 | 2004-07-29 | Beaty Keith D. | Implant surface preparation |
US6652765B1 (en) | 1994-11-30 | 2003-11-25 | Implant Innovations, Inc. | Implant surface preparation |
US6726688B2 (en) | 1996-02-03 | 2004-04-27 | Karl-Dieter Lerch | Device for postoperative fixation back into the cranium of a plug of bone removed therefrom during a surgical operation |
US20040172029A1 (en) * | 1996-02-03 | 2004-09-02 | Karl-Dieter Lerch | Device for postoperative fixation back into the cranium of a plug of bone removed therefrom during a surgical operation |
US6270500B1 (en) | 1996-02-03 | 2001-08-07 | Karl-Dieter Lerch | Device for postoperative fixation back into the cranium of a plug of bone removed therefrom during a surgical operation |
US6328743B2 (en) | 1996-02-03 | 2001-12-11 | Karl-Dieter Lerch | Device for postoperative fixation back into the cranium of a plug of bone removed therefrom during a surgical operation |
US6962591B2 (en) | 1996-02-03 | 2005-11-08 | Karl-Dieter Lerch | Device for postoperative fixation back into the cranium of a plug of bone removed therefrom during a surgical operation |
US6258091B1 (en) | 1996-02-14 | 2001-07-10 | Walter Lorenz Surgical Inc. | Bone fastener and instrument for insertion thereof |
US6589244B1 (en) | 1996-02-14 | 2003-07-08 | Walter Lorenz Surgical, Inc. | Bone fastener and instrument for insertion thereof |
US6491723B1 (en) | 1996-02-27 | 2002-12-10 | Implant Innovations, Inc. | Implant surface preparation method |
US5899939A (en) * | 1998-01-21 | 1999-05-04 | Osteotech, Inc. | Bone-derived implant for load-supporting applications |
US6123731A (en) * | 1998-02-06 | 2000-09-26 | Osteotech, Inc. | Osteoimplant and method for its manufacture |
US6294041B1 (en) | 1998-02-06 | 2001-09-25 | Osteotech, Inc. | Method for an osteoimplant manufacture |
US6843807B1 (en) | 1998-02-06 | 2005-01-18 | Osteotech Inc. | Osteoimplant |
US6379363B1 (en) | 1999-09-24 | 2002-04-30 | Walter Lorenz Surgical, Inc. | Method and apparatus for reattachment of a cranial flap using a cranial clamp |
US8197474B2 (en) | 1999-10-15 | 2012-06-12 | Warsaw Orthopedic, Inc. | Volume maintaining osteoinductive/osteoconductive compositions |
US8002813B2 (en) | 1999-10-15 | 2011-08-23 | Warsaw Orthopedic, Inc. | Volume maintaining osteoinductive/osteoconductive compositions |
US8663672B2 (en) | 2000-07-19 | 2014-03-04 | Warsaw Orthopedic, Inc. | Osteoimplant and method of making same |
US9387094B2 (en) | 2000-07-19 | 2016-07-12 | Warsaw Orthopedic, Inc. | Osteoimplant and method of making same |
US20060030948A1 (en) * | 2000-07-19 | 2006-02-09 | Albert Manrique | Osteoimplant and method of making same |
US9999520B2 (en) | 2000-07-19 | 2018-06-19 | Warsaw Orthopedic, Inc. | Osteoimplant and method of making same |
US20030009235A1 (en) * | 2000-07-19 | 2003-01-09 | Albert Manrique | Osteoimplant and method of making same |
US20110108644A1 (en) * | 2000-12-14 | 2011-05-12 | Morris John W | Method of Making Demineralized Bone Particles |
US8529962B2 (en) | 2000-12-14 | 2013-09-10 | Warsaw Orthopedic, Inc. | Method of making demineralized bone particles |
US7939108B2 (en) | 2000-12-14 | 2011-05-10 | Osteotech, Inc. | Method of making demineralized bone particles |
US20040127908A1 (en) * | 2001-09-25 | 2004-07-01 | Roman Shawn David | Cranial clamp with torque-limiting feature |
US6685707B2 (en) | 2001-09-25 | 2004-02-03 | Walter Lorenz Surgical, Inc. | Cranial clamp and method for fixating a bone plate |
US20080145392A1 (en) * | 2001-10-12 | 2008-06-19 | David Knaack | Bone Graft |
US7959941B2 (en) | 2001-10-12 | 2011-06-14 | Warsaw Orthopedic, Inc. | Bone graft comprising a demineralized bone matrix and a stabilizing agent |
US6984236B2 (en) | 2001-10-24 | 2006-01-10 | Faro Technologies, Inc. | Bone connective prosthesis and method of forming same |
US20030130736A1 (en) * | 2001-10-24 | 2003-07-10 | Simon Raab | Bone connective prosthesis and method of forming same |
US8753689B2 (en) | 2001-12-14 | 2014-06-17 | Warsaw Orthopedic, Inc. | Method of making demineralized bone particles |
US10227697B2 (en) | 2003-05-16 | 2019-03-12 | Biomet 3I, Llc | Surface treatment process for implants made of titanium alloy |
US11015253B2 (en) | 2003-05-16 | 2021-05-25 | Biomet 3I, Llc | Surface treatment process for implants made of titanium alloy |
US20040265780A1 (en) * | 2003-05-16 | 2004-12-30 | Robb T. Tait | Surface treatment process for implants made of titanium alloy |
US8251700B2 (en) | 2003-05-16 | 2012-08-28 | Biomet 3I, Llc | Surface treatment process for implants made of titanium alloy |
US8268008B2 (en) | 2003-06-11 | 2012-09-18 | Warsaw Orthopedic, Inc. | Osteoimplants and methods for their manufacture |
US9393116B2 (en) | 2003-06-11 | 2016-07-19 | Warsaw Orthopedic, Inc. | Osteoimplants and methods for their manufacture |
US20070088437A1 (en) * | 2003-06-11 | 2007-04-19 | Betz Randal R | Osteoimplants and methods for their manufacture |
US20070000802A1 (en) * | 2005-06-21 | 2007-01-04 | Cervitech, Inc. | Holder for intervertebral prostheses |
US8545864B2 (en) | 2005-11-02 | 2013-10-01 | Warsaw Orthopedic, Inc. | Hemostatic bone graft |
US20080063671A1 (en) * | 2005-11-02 | 2008-03-13 | Morris John W | Hemostatic bone graft |
US20090062798A1 (en) * | 2006-11-06 | 2009-03-05 | Janet Conway | Internal bone transport |
US8043299B2 (en) * | 2006-11-06 | 2011-10-25 | Janet Conway | Internal bone transport |
US8333591B2 (en) * | 2007-04-12 | 2012-12-18 | Daguo Zhao | Bionic dental implant |
US20100055646A1 (en) * | 2007-04-12 | 2010-03-04 | Daguo Zhao | Bionic dental implant |
US8722075B2 (en) | 2008-10-24 | 2014-05-13 | Warsaw Orthopedic, Inc. | Compositions and methods for promoting bone formation |
US20100239634A1 (en) * | 2008-10-24 | 2010-09-23 | Shimp Lawrence A | Compositions and methods for promoting bone formation |
US9289275B2 (en) | 2010-10-21 | 2016-03-22 | Daguo Zhao | Bionic tooth implant, and base and sub-root thereof |
US20170172710A1 (en) * | 2014-12-19 | 2017-06-22 | Paul Hertz | Dental Implant System |
US10779912B2 (en) * | 2014-12-19 | 2020-09-22 | Paul Hertz | Dental implant system |
US11622839B2 (en) | 2014-12-19 | 2023-04-11 | Paul Hertz | Dental implant system |
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