Source: http://www.google.com/patents/US5989026?dq=5,987,610
Timestamp: 2017-05-25 21:21:59
Document Index: 798630809

Matched Legal Cases: ['art. 27', 'art 10', 'art 10', 'art 60', 'art 100', 'art 60', 'art 60', 'art 100', 'arts 60']

Patent US5989026 - Ceramic two-piece dental abutment - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA two-piece abutment system is disclosed. The first part includes a tapering inner surface which is part of a bore extending entirely through the first part. The first part includes a socket for mating with a boss or post on a dental implant. The elongated second part includes a threaded stem for engaging...http://www.google.com/patents/US5989026?utm_source=gb-gplus-sharePatent US5989026 - Ceramic two-piece dental abutmentAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS5989026 APublication typeGrantApplication numberUS 09/179,493Publication dateNov 23, 1999Filing dateOct 26, 1998Priority dateMay 25, 1995Fee statusPaidPublication number09179493, 179493, US 5989026 A, US 5989026A, US-A-5989026, US5989026 A, US5989026AInventorsDan Paul Rogers, Gale R. Brown, Daniel Y. SullivanOriginal AssigneeImplant Innovations, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (102), Non-Patent Citations (19), Referenced by (67), Classifications (15), Legal Events (9) External Links: USPTO, USPTO Assignment, EspacenetCeramic two-piece dental abutment
13. The abutment of claim 1, wherein said predetermined angle is in the range from about 5° to about 20° for providing a locking taper between said first and second parts.
26. An abutment for attaching to a dental implant embedded in living jawbone and having an upper surface with a fitting, said abutment comprising:a tubular first part with a metallic core and a ceramic outer portion surrounding said metallic core, said tubular first part having a bore extending therethrough along a central axis, said bore including a tapered portion tapering at an angle between about 5° and about 20°, said metallic core having a lower flanged portion for engaging said upper end of said implant; and an elongated part extending through said bore of said tubular first part and having a threaded stem for engaging a threaded bore of said implant and a post protruding above said first part, said elongated part including a tapered outer surface that tapers at said angle for forming a locking taper with said tubular first part. 27. The abutment of claim 26, wherein said metallic core includes at least two separate metallic pieces.
40. An abutment for attaching to a dental implant embedded in living jawbone and having an upper surface with a fitting, said abutment comprising:a tubular first part with a metallic core and a ceramic outer portion surrounding said metallic core, said tubular first part having a bore extending therethrough along a central axis, said bore including a tapered portion tapering at an angle between about 5° and about 20°, said metallic core having a lower flanged portion for engaging said upper end of said implant; an elongated part extending through said bore of said tubular first part and having a threaded stem for engaging a threaded bore of said implant and a post protruding above said first part, said elongated part including a tapered outer surface that tapers at said angle for forming a locking taper with said tubular first part; and a lubricant at an interface of said tapered outer surface and said tapered portion of said bore. 41. An abutment for supporting a dental prosthesis, said abutment being attached to a dental implant that is integrated with living jawbone, said dental implant including a threaded bore and a boss protruding away from an upper portion thereof, said abutment comprising:a first part constructed of a metallic core and a ceramic outer piece positioned around said metallic core and attached thereto, said first part including a bore extending therethrough along a central axis and a socket for receiving said boss of said implant, said metallic core including at least two separate metallic pieces; and a second part for extending through said bore of said first part and holding said first part on said implant, said second part including a lower portion for threadably engaging said threaded bore of said implant and a head portion for engaging said first part in said bore. 42. The abutment of claim 41, wherein one of said two metallic pieces of said metallic core forms a portion of said bore and the other of said two metallic pieces forms said socket.
The first part 10 shown in FIG. 1 comprises a tubular body 11 having a socket 12 at its lower section 14. The socket 12 extends upwardly into the body 11 from its lower wall 16 and has a regular polygonal (hexagonal) transverse shape for intermitting non-rotationally on a matching boss of a typical dental implant (illustrated in FIGS. 11-15). Externally, the lower section 14 of the body 11 has an expanding transverse size as it proceeds away from the lower wall 16 and an upper section 18 of contracting transverse size as it proceeds further away from the lower wall 16. Where the lower and uppers sections 14 and 18 are joined, the upper section 18 is smaller transversely than the lower section 14 which provides for a shoulder 20 facing away from the implant. The upper section has a female locking taper 22 which opens into the socket 12. The female locking taper 22 and the socket 12 form a part of a bore through the first part 10. The female locking taper 22 diverges at an angle α which is generally in the range from about 5° to about 20°.
FIGS. 11A-11B illustrate the first part 60 of FIG. 7 and the second part 100 of FIG. 9 mounted on an implant 130. The implant 130 has an upper table 132 on which the lower surface 76 of the first part 60 mates. The socket 66 of the first part 60 captures the correspondingly shaped boss 134 on the implant 130. As the threaded shaft 102 of the second part 100 is screwed into a threaded bore 136 in the implant 130, the locking tapered surfaces 104 and 72 engage and tighten. Typically, the torque required to complete the assembly of the first and second parts 60 and 100 on the implant 120 is in the range from about 30 N·cm to about 40 N·cm. Once assembled, the two-piece abutment serves numerous functions as is described below.
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