EP0015599A1
Expired / Lapsed
EP
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Artificial tooth system
Assignee: Individual
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Filing: 1980-02-14
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Granted: —
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Expires: 2000-02-14
Abstract
Abstract A dental implant system to provide a mechanically self-sufficient artificial tooth possessing a functional pseudo pendontal ligament that does not cause resorption of the supporting bone and ultimate loss is disclosed. The implant includes a core component (1) that withstands the masticatory load and transmits such load to the root system. The root system comprises an outer component (3) that adheres to the jawbone (2) and possesses a similar modulus of elasticity thus capable of transmitting masticatory stresses along its interface with the bone without excessive stress concentrations and an intermediate component (4) adhering tightly to both the core component (1) and the outer component (3) and having a much lower modulus of elasticity than either the core component (1) and the outer component (3). The longitudinal movement of the core component (1) causes the oblique or diagonal stretching of the intermediate component (4) which pulls or applies a force an the outer component (3) which tends to contract it and creates tensile stresses in the portions of the supporting jawbone (2) which interface with the outer component. Such tensile stresses cause bone deposition and stabilize the implant further.
Inventors
- 👤 M. Hamdi A. Mohammed
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 01:55
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0086; A61C8/0048; A61C8/005; A61C8/0065; A61C8/0069; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30907; A61C8/0054; A61C8/0057; A61C8/0063; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30014; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2002/30235; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30362; A61F2002/3037; A61F2002/30372; A61F2002/30405; A61F2002/30929; A61F2/3094; A61F2002/30968; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2230/00; A61F2230/0063; A61F2230/0069; A61F2250/00; A61F2250/0014; A61F2250/0018; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00029; A61F2310/00161; A61F2310/00173; A61F2310/00179; A61F2310/00353; A61F2310/00389; A61F2310/00395; A61F2310/00407; A61F2310/00574; A61F2310/00586; A61F2310/00592; A61F2310/00928; A61F2310/00952
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
85 words
A bone implant characterized in having a core providing a central shaft, an outer component surrounding the central shaft and spaced therefrom to define a gap therewith, an intermediate component disposed in the gap, means securing the intermediate component both to the central shaft and to the outer component, the intermediate component having a lower modulus of elasticity than either the central shaft or the outer component to permit axial movement of the central shaft relative to the outer component and to transmit forces therebetween.
Claim 2
Dependent Claim
85 words
A bone implant characterized in having a core providing a central shaft, an outer component surrounding the central shaft and spaced therefrom to define a gap therewith, an intermediate component disposed in the gap, means securing the intermediate component both to the central shaft and to the outer component, the intermediate component having a lower modulus of elasticity than either the central shaft or the outer component to permit axial movement of the central shaft relative to the outer component and to transmit forces therebetween.
Claim 3
Dependent Claim
22 words
The bone implant according to claim 1 characterized in that the modulus of elasticity of the outer layer approximates that of bone.
Claim 4
Dependent Claim
20 words
The bone implant according to claim 1 characterized in that the outer component is porous to permit bone growth therein.
Claim 5
Dependent Claim
91 words
An artificial tooth system characterized in comprising a dental implant having a core providing a central shaft, an outer component surrounding the central shaft and spaced therefrom to define a gap therewith, an intermediate component disposed in the gap, means securing the intermediate component both to the central shaft and to the outer component, the intermediate component having a lower modulus of elas- , ticity than either the central shaft or the outer component to permit axial movement of the central shaft relative-to the outer component and to transmit forces therebetween.
Claim 6
Dependent Claim
91 words
An artificial tooth system characterized in comprising a dental implant having a core providing a central shaft, an outer component surrounding the central shaft and spaced therefrom to define a gap therewith, an intermediate component disposed in the gap, means securing the intermediate component both to the central shaft and to the outer component, the intermediate component having a lower modulus of elas- , ticity than either the central shaft or the outer component to permit axial movement of the central shaft relative-to the outer component and to transmit forces therebetween.
Claim 7
Dependent Claim
38 words
The artificial tooth system according to claim 4, characterized in that the modulus of elasticity of the intermediate layer is no more than about one-fifth as much as that of either the central shaft of the outer layer.
Claim 8
Dependent Claim
32 words
The artificial tooth system according to claim 1 characterized in that the central shaft has a porous surface layer adjacent the gap and the intermediate component is engaged in the voids thereof.
Claim 9
Dependent Claim
32 words
The artificial tooth system according to claim 3 characterized in that the outer component has a porous surface layer adjacent the gap and the intermediate component is engaged in the voids thereof.
Claim 10
Dependent Claim
21 words
The artificial tooth system according to claim 1 characterized in that the outer component is porous to permit bone growth therein.
Claim 11
Dependent Claim
23 words
The artificial tooth system according to claim 1, characterized in that the modulus of elasticity of the outer component approximates that of bone.
Claim 12
Dependent Claim
32 words
The artificial tooth system according to claim 6, characterized in that the modulus of elasticity of the outer component is in the range of about 0.5 - 2 times that of bone.
References Cited (Backward Citations)
GB1291470A
Cited
DE2247721A1
Cited
DE2253338B2
Cited
CH561052A5
Cited
DE2411617B2
Cited
DE2413883A1
Cited
FR2290880A1
Cited
US3934347A
Cited
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