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US4744755A Expired / Lapsed US ⏱️ 0.0 years remaining

Dental implant and method for installing same

Assignee: Ross Systems Corp
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Filing: 1986-08-13
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Granted: 1988-05-17
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Expires: 2006-08-13
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Abstract

Abstract A dental implant is adapted to be installed in a predrilled bore formed in jaw bone tissue for retaining a dental prosthesis. The implant comprises a generally cylindrical body defining a longitudinal axis and including an outer periphery. The body is open at a front end thereof and includes a front cylindrical cavity for receiving a cylindrical bone core. A plurality of through-holes is formed in the body and communicates with the front cavity to accommodate the growth of bone tissue therethrough. The body is open at a rear end thereof and includes a rear cavity communicating with the open rear end for receiving a prosthesis attachment. The outer periphery of the body includes a plurality of longitudinally spaced, reservoir-defining structures, each of which includes a recessed surface facing toward one of the longitudinal ends of the implant and arranged to store blood adjacent the surrounding bone to promote the growth of new bone tissue.

Inventors

  • 👤 Stanley E. Ross

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 23:52
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0018; A61C8/0037; A61C8/0039

Claims Analysis

Total Claims: 14
Claim 1
Independent Claim 303 words
A dental implant adapted to be installed in a predrilled bore formed in jaw bone tissue for retaining a dental prosthesis, said implant comprising a generally cylindrical body defining a longitudinal axis, said body being open at a front end thereof and including a cylindrical front cavity communicating with said open front end for receiving a cylindrical bone core, said front cavity being surrounded by a front portion of said body, said front portion including a plurality of circumferentially and radially spaced through-holes extending radially completely therethrough to accommodate the growth of bone tissue therethrough, said body being open at a rear end thereof and including an internally threaded cylindrical rear cavity which communicates with said open rear end and adapts said rear cavity to receive externally threaded prosthesis-attachment means, said rear cavity being surrounded by a rear portion of said body, said rear portion being non-apertured, said front and rear portions of said body including front and rear outer peripheries, respectively, each of which including a plurality of outwardly projecting longitudinally spaced, circumferentially extending ribs, each rib lying in a plane extending transversely to said longitudinal axis, at least some of said ribs on said rear outer periphery surrounding said rear cavity, said ribs on said front and rear outer peripheries including outer surfaces of the same diameter to define a maximum outer diameter of said implant, at least some of said ribs including a front surface facing toward said front end and a rear surface facing toward said rear end, at least one of said front and rear surfaces being offset longitudinally relative to said outer periphery of said rib in a direction away from the respective implant end toward which said one surface faces in order to define an annular reservoir adapted to store blood adjacent to surrounding bone tissue.
Claim 2
Dependent Claim 303 words
A dental implant adapted to be installed in a predrilled bore formed in jaw bone tissue for retaining a dental prosthesis, said implant comprising a generally cylindrical body defining a longitudinal axis, said body being open at a front end thereof and including a cylindrical front cavity communicating with said open front end for receiving a cylindrical bone core, said front cavity being surrounded by a front portion of said body, said front portion including a plurality of circumferentially and radially spaced through-holes extending radially completely therethrough to accommodate the growth of bone tissue therethrough, said body being open at a rear end thereof and including an internally threaded cylindrical rear cavity which communicates with said open rear end and adapts said rear cavity to receive externally threaded prosthesis-attachment means, said rear cavity being surrounded by a rear portion of said body, said rear portion being non-apertured, said front and rear portions of said body including front and rear outer peripheries, respectively, each of which including a plurality of outwardly projecting longitudinally spaced, circumferentially extending ribs, each rib lying in a plane extending transversely to said longitudinal axis, at least some of said ribs on said rear outer periphery surrounding said rear cavity, said ribs on said front and rear outer peripheries including outer surfaces of the same diameter to define a maximum outer diameter of said implant, at least some of said ribs including a front surface facing toward said front end and a rear surface facing toward said rear end, at least one of said front and rear surfaces being offset longitudinally relative to said outer periphery of said rib in a direction away from the respective implant end toward which said one surface faces in order to define an annular reservoir adapted to store blood adjacent to surrounding bone tissue.
Claim 3
Dependent Claim 17 words
A dental implant according to claim 1, wherein said at least one surface comprises said front surface.
Claim 4
Dependent Claim 19 words
A dental implant according to claim 2, wherein said front surfaces are inclined rearwardly obliquely from their outer circumferences.
Claim 5
Dependent Claim 34 words
A dental implant according to claim 3, wherein said obliquely oriented front surfaces are oriented at an angle of from 10 to 60 degrees relative to a plane disposed perpendicularly to said longitudinal axis.
Claim 6
Dependent Claim 13 words
A dental implant according to claim 4, wherein said angle is 15 degrees.
Claim 7
Dependent Claim 17 words
A dental implant according to claim 1, wherein said at least one surface comprises said rear surface.
Claim 8
Dependent Claim 19 words
A dental implant according to claim 6, wherein said rear surfaces are inclined forwardly obliquely from their outer circumferences.
Claim 9
Dependent Claim 34 words
A dental implant according to claim 7, wherein said obliquely inclined rear surfaces are oriented at an angle of from 10 to 60 degrees relative to a plane disposed perpendicularly to said longitudinal axis.
Claim 10
Dependent Claim 13 words
A dental implant according to claim 7, wherein said angle is 15 degrees.
Claim 11
Dependent Claim 20 words
A dental implant according to claim 1, wherein said at least one surface comprises both said front and rear surfaces.
Claim 12
Dependent Claim 20 words
A dental implant according to claim 1, wherein said body includes a divider wall separating said front and rear cavities.
Claim 13
Dependent Claim 21 words
A dental implant according to claim 1, including a plurality of ribs disposed longitudinally between longitudinally spaced ones of said through-holes.
Claim 14
Dependent Claim 13 words
A dental implant according to claim 1, wherein said ribs extend circumferentially endlessly.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-05-17 1991-11-16 1992-05-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-05-17 1995-11-16 1996-05-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-05-17 1999-11-16 2000-05-17 $7700.00 Window Closed / Lapsed

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