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US5087200A Expired / Lapsed US ⏱️ 0.0 years remaining

Spacer for dental implants

Assignee: Nobel Biocare AB
•
Filing: 1990-11-16
•
Granted: 1992-02-11
•
Expires: 2010-11-16
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Abstract

Abstract The disclosure relates to a spacer for dental implants of a bio-compatible material. The spacer includes an inner sleeve-shaped spacer element (4) of titanium which is part of a screw connection between an anchorage element (fixture) (1) implanted in the maxillary beneath the gingiva, and a dental prosthesis construction whose joint surface (11) is located above the gingiva and which is disposed to absorb the loading of the screw connection. The spacer further includes an outer spacer sleeve (12) of porcelain or ceramics which wholly or partly encloses the inner sleeve-like spacer element (4). The ceramic or porcelain sleeve may, by grinding and coating with porcelain of different colors, by caused by visually approximate a dental cervix and gingiva and, thereby, not contrast with the natural dental cervix color and gingival color to the same extent as does the titanium material.

Inventors

  • 👤 Izidor Brajnovic
  • 👤 Lars Jorneus

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 04:42
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0048; A61C8/005; A61C8/0068

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 137 words
An angulated spacer element adapted at its one end for attachment to a fixture defining therein a threaded aperture, said fixture being intended for implantation in the maxillary, and said spacer element being adapted at its other end to support a dental prosthesis, said spacer element comprising: a unitary member having a first portion with an end surface thereof permitting abutting engagement with the protruding end of the implanted fixture, said first portion also having a through bore defining an internal ledge to enable a screw to pass through said bore, abut said ledge, and threadably engage the threaded aperture in the fixture; and said unitary member having a second portion having means for supporting and securing to said unitary member said dental prosthesis, said second portion forming an acute angle with respect to said through bore.
Claim 2
Dependent Claim 137 words
An angulated spacer element adapted at its one end for attachment to a fixture defining therein a threaded aperture, said fixture being intended for implantation in the maxillary, and said spacer element being adapted at its other end to support a dental prosthesis, said spacer element comprising: a unitary member having a first portion with an end surface thereof permitting abutting engagement with the protruding end of the implanted fixture, said first portion also having a through bore defining an internal ledge to enable a screw to pass through said bore, abut said ledge, and threadably engage the threaded aperture in the fixture; and said unitary member having a second portion having means for supporting and securing to said unitary member said dental prosthesis, said second portion forming an acute angle with respect to said through bore.
Claim 3
Dependent Claim 22 words
The spacer element of claim 1, in which said through bore defines an opening extending through the wall of said second portion.
Claim 4
Dependent Claim 28 words
The spacer element as claimed in claim 2, further comprising: a covering sleeve adapted for insertion over said second portion of said unitary member to cover said opening.
Claim 5
Dependent Claim 28 words
The spacer element as claimed in claim 3, wherein said covering sleeve abuts against an outwardly-extending flange formed between said first and second portion of said unitary member.
Claim 6
Dependent Claim 18 words
The spacer element as claimed in claim 4, wherein said covering sleeve is made of porcelain or ceramics.

References Cited (Backward Citations)

US3732621A Cited
WO1983000616A1 Cited
US4531915A Cited
US4547157A Cited
US4713003A Cited
EP0216031A1 Cited
US4645453A Cited
US4842518A Cited
US4713004A Cited
WO1988003007A1 Cited
US4780080A Cited
US5000685A Cited
US5000685B1 Cited
US4854872A Cited
US4854872B1 Cited
US4907969A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1995-02-10 1995-08-12 1996-02-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-02-10 1999-08-12 2000-02-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-02-10 2003-08-12 2004-02-11 $7700.00 Window Closed / Lapsed

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