The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 1997
Filed:
Aug. 11, 1995
Gordon D Blacklock, Albuquerque, NM (US);
Other;
Abstract
An anchor for a dental implant, having a compact cavity for receiving the post of a post and core, and a tapered threaded end having tapered, self-tapping threads. The cavity is configured to have flat walls forming a hexagonal or other polygonal interior surface. This interior surface also has screw threads superimposed on the polygonal surface. The anchor is thus of reduced axial length than prior art anchors having threads and polygonal surfaces not superimposed. The tapered threads formed on the tapered threaded end engage different areas of bone tissue. Since bone tissue may not be homogeneously strong and resilient, this arrangement helps assure that some threads will engage strong, resilient bone tissue. This threading preferably comprises buttress type threads. A pitched relief groove extends across all convolutions of the external, self-tapping threads formed on the tapered end. These self-tapping threads are buttress threads. The pitch of the relief groove is angled to vary from that of the threads, so that the groove intersects all threads, but the pitch is inclined in the same direction as that of the threads. The groove thus complements screwing action of the self-tapping threads.