GB2031450A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Artificial dental root
Assignee: Kureha Corp
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Filing: 1979-10-08
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Granted: —
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Expires: 1999-10-08
Abstract
Abstract An artificial dental root comprises a particulate or powdered form of synthetic hydroxyapatite or calcined or sintered synthetic hydroxyapatite or a mixture thereof and an organic polymer binder matrix, the surface area of said artificial dental root to be brought into contact with bone being composed of both a phase of said hydroxyapatite and a phase of said organic matrix. The root is prepared by blending said hydroxyapatite with said organic matrix and molding the blend. The root has adequate, but moderate, affinity for bone and high mechanical strength, and can, if necessary, be extracted without damaging the surrounding bone.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-23 04:09
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/50; A61K6/58; A61K6/15; A61K6/17; A61K6/70; A61K6/71; A61K6/74; A61K6/75
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
79 words
An artificial dental root having a portion for coaptation with bone, at least the said portion being of a composition comprising particulate or powdered synthetic hydroxyapatite dispersed in an organic polymeric binder matrix and having a surface for coaptation with bone at which both hydroxyapatite and organic polymeric binder matrix phases are exposed, the areas of the said surface occupied by the hydroxyapatite and organic polymeric binder matrix phases respectively being in a ratio of from 5:95 to 70:30.
Claim 2
Dependent Claim
79 words
An artificial dental root having a portion for coaptation with bone, at least the said portion being of a composition comprising particulate or powdered synthetic hydroxyapatite dispersed in an organic polymeric binder matrix and having a surface for coaptation with bone at which both hydroxyapatite and organic polymeric binder matrix phases are exposed, the areas of the said surface occupied by the hydroxyapatite and organic polymeric binder matrix phases respectively being in a ratio of from 5:95 to 70:30.
Claim 3
Dependent Claim
22 words
An artificial dental root according to claim 1 wherein at least part of the synthetic hydroxyapatite is calcined or sintered synthetic hydroxyapatite.
Claim 4
Dependent Claim
20 words
An artificial dental root according to claim 1 or 2 wherein the said area ratio is from
10:90 to 60:40.
Claim 5
Dependent Claim
21 words
An artificial dental root according to any preceding claim wherein the said exposed hydroxyapatite phase is discontinuous in the said surface.
Claim 6
Dependent Claim
23 words
An artificial dental root according to any preceding claim wherein the particle diameter of the synthetic hydroxyapatite is not more than 1 000ism.
Claim 7
Dependent Claim
50 words
An artificial dental root according to any preceding claim wherein the organic polymeric binder matrix comprises at least one polymer selected from bisphenol A-glycidyl methacrylate polycondensates, polymethyl methyacrylate, poly-2-hydroxyethyl methacrylate, polyethylene, polysulfones, polyamides, polyesters, polytetrafluoroethylene, polyvinylidene fluoride and polycarbonates, and copolymers of two or more copolymerisable monomers of said polymers.
Claim 8
Dependent Claim
17 words
An artifical dental root substantially as hereinbefore described in any one of Sample Nos. 1 to 8.
Claim 9
Dependent Claim
17 words
An artifical dental root substantially as hereinbefore described in any one of Sample Nos. 1 to 8.
Claim 10
Dependent Claim
63 words
A process for preparing an artificial dental root which comprises uniformly blending particulate or powdered synthetic hydroxyapatite with an organic polymeric binder or polymerisable binder precursor, and moulding the blend to form a moulded product having a surface for coaptation with bone at which respective hydroxyapatite and organic polymeric binder matrix phases are exposed in an area ratio of from 5:95 to 70:30.
Claim 11
Dependent Claim
63 words
A process for preparing an artificial dental root which comprises uniformly blending particulate or powdered synthetic hydroxyapatite with an organic polymeric binder or polymerisable binder precursor, and moulding the blend to form a moulded product having a surface for coaptation with bone at which respective hydroxyapatite and organic polymeric binder matrix phases are exposed in an area ratio of from 5:95 to 70:30.
Claim 12
Dependent Claim
76 words
A process for preparing an artificial dental root which comprises uniformly blending particulate or powdered synthetic hydroxyapatite with an organic polymeric binder or polymerisable binder precursor, moulding the blend to form a moulded product and separating from this moulded product a portion of a required shape and size having a surface for coaptation with one at which respective hydroxyapatite and organic polymeric binder matrix phases are exposed in an area ratio of from 5:95 to 70:30.
Claim 13
Dependent Claim
76 words
A process for preparing an artificial dental root which comprises uniformly blending particulate or powdered synthetic hydroxyapatite with an organic polymeric binder or polymerisable binder precursor, moulding the blend to form a moulded product and separating from this moulded product a portion of a required shape and size having a surface for coaptation with one at which respective hydroxyapatite and organic polymeric binder matrix phases are exposed in an area ratio of from 5:95 to 70:30.
Claim 14
Dependent Claim
29 words
A process according to claim 8 or 9 wherein the moulded product is cut to a desired shape and size portion having the said surface for coaptation with bone.
Claim 15
Dependent Claim
24 words
A process according to any of claims 8 to 10 wherein at least part of the synthetic hydroxyapatite is calcined or sintered synthetic hydroxyapatite.
Claim 16
Dependent Claim
26 words
1 2. A process according to any of claims 8 to 11 wherein the particle diameter of the synthetic hydroxyapatite is not more than 1000 clam.
Claim 17
Dependent Claim
58 words
1 3. A process according to any of claims 8 to 1 2 wherein the organic polymeric binder matrix of the moulded product comprises at least one polymer selected from bisphenol Aglycidyl methcrylate polycondensates, polymethyl methyacrylate, poly-2-hydroxyethyl methacrylate, polyethylene, polysulfones, polyamides, polyesters, polytetrafluoroethylene, polyvinylidene fluoride and polycarbonates, and copolymers of two or more copolymerisable monomers of said polymers.
Claim 18
Dependent Claim
90 words
A process for preparing an artificial dental root, the process being substantially as hereinbefore described in any one of Examples 2 to 8. 1 5. An artificial dental root having a portion for coaptation with bone, at least the said portion being of a composition comprising particulate or powdered synthetic hydroxyapatite dispersed in an organic polymeric binder matrix and having a surface for coaptation with bone at which both hydroxyapatite and organic polymeric binder matrix phases are exposed, the area of the said surface occupied by the hydroxyapatite being discontinuous.
Claim 19
Dependent Claim
90 words
A process for preparing an artificial dental root, the process being substantially as hereinbefore described in any one of Examples 2 to 8. 1 5. An artificial dental root having a portion for coaptation with bone, at least the said portion being of a composition comprising particulate or powdered synthetic hydroxyapatite dispersed in an organic polymeric binder matrix and having a surface for coaptation with bone at which both hydroxyapatite and organic polymeric binder matrix phases are exposed, the area of the said surface occupied by the hydroxyapatite being discontinuous.
References Cited (Backward Citations)
No citation records indexed.
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