US4713006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial tooth root
Assignee: Olympus Corp
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Filing: 1986-03-26
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Granted: 1987-12-15
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Expires: 2006-03-26
Abstract
Abstract An artificial tooth root is divided into a tooth root body and a root holder. The material for the artificial tooth root body is selected in consideration of its strength. The outer surface of the root holder that is in contact with the alveolar bone is formed of a biologically activated material for providing strong adhesion between the root holder and the alveolar bone. An impact reducing material is provided between the artificial tooth root body and the root holder to reduce the impact force placed on the tooth root body so that the force applied to the alveolar bone portion is reduced.
Inventors
- 👤 Yasuharu Hakamatsuka
- 👤 Nobuyuki Yokoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:41
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/111; A; A61; A61C; A61C8/00; A61C8/0012; A61C8/0048; A61C8/005; A61C8/0057; A61C8/0065; A61C8/0069; A61C8/0086; C04B35/48; C04B35/486; A61C8/0013; A61C8/0054; C04B2111/00; C04B2111/00474; C04B2111/00836
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
133 words
An artificial tooth root implantable in a recess formed in an alveolar bone portion, comprising: an artificial tooth root body; a root holder, which is insertable into said alveolar bone recess, at least that portion of an outer surface of said root holder that is in contact with the alveolar bone portion being formed of biologically activated material, said root holder having walls defining a receiving recess in said root holder and into which said artificial tooth root body is fitted; and an impact reducing means including a silicon rubber impact absorbing material and an adhesive provided between said artificial tooth root body and said walls of said root holder defining said receiving recess, for elastically boding said tooth root body to said root holder and for reducing impact on said root holder.
Claim 2
Dependent Claim
133 words
An artificial tooth root implantable in a recess formed in an alveolar bone portion, comprising: an artificial tooth root body; a root holder, which is insertable into said alveolar bone recess, at least that portion of an outer surface of said root holder that is in contact with the alveolar bone portion being formed of biologically activated material, said root holder having walls defining a receiving recess in said root holder and into which said artificial tooth root body is fitted; and an impact reducing means including a silicon rubber impact absorbing material and an adhesive provided between said artificial tooth root body and said walls of said root holder defining said receiving recess, for elastically boding said tooth root body to said root holder and for reducing impact on said root holder.
Claim 3
Dependent Claim
38 words
An artificial tooth root according to claim 1, wherein said root holder is made of a material selected from the group of Al 2 O 3 --ZrO 2 and Al 2 O 3 --Y 2 O 3 .
Claim 4
Dependent Claim
27 words
An artificial tooth root according to claim 1, wherein said biologically activated material is a material selected from the group of β-TCP, hydroxyapatite and a compound thereof.
Claim 5
Dependent Claim
66 words
An artificial tooth root according to claim 1, wherein said artificial tooth root body is formed of at least one material of a group comprising a compound material which uses a ceramic of the calcium phosphate group, an apatite ceramic, a polymethyl metacrylate, titanium, Co--Cr--Mo alloy, Al 2 O 3 , ZrO 2 , Si 3 N 4 , SiC or a free cutting crystallized glass.
Claim 6
Dependent Claim
17 words
An artificial tooth root according to claim 1, wherein said impact absorbing material is a ceramic fiber.
Claim 7
Dependent Claim
32 words
An artificial tooth root according to claim 1, wherein said adhesive comprises an adhesive layer which adheres said impact absorbing material to the root holder and to the artificial tooth root body.
Claim 8
Dependent Claim
22 words
An artificial tooth root according to claim 6, wherein Young's modulus of said adhesive layer is less than 0.14 kg/mm 2 .
Claim 9
Dependent Claim
23 words
An artificial tooth root according to claim 7, wherein said adhesive layer is a MMA-PMMA compound to which tri-n-butyl boron has been added.
Claim 10
Dependent Claim
18 words
An artificial tooth root according to claim 1, wherein said root holder is made of a porous material.
Claim 11
Dependent Claim
26 words
An artificial tooth root according to claim 9, wherein said porous material is a material selected from the group of β-TCP, hydroxyapacite and a compound thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |