Dental implant with interlocking and centering threads

• US 10,441,385 B2
• Filed: 11/17/2016
• Issued: 10/15/2019
• Est. Priority Date: 06/22/2009
• Status: Active Grant

• Current Assignee: Rtg Scientific Inc.
• Original Assignee: RTG Scientific, LLC
• Inventors: Reed, Gary
• Primary Examiner(s): Afzali, Sarang
• Application Number:
  US15/354,429
• Publication Number:
  US 20170135788A1
• Time in Patent Office: 1,062 Days
• CPC Class Codes: A61C 8/0018 characterised by the shape
• CPC Class Codes: A61C 8/0022 Self-screwing A61C8/0028 takes precedence
• CPC Class Codes: A61C 8/005 Connecting devices for joining an upper structure with an implant member, e.g. spacers
• CPC Class Codes: A61C 8/0068 with an additional screw
• CPC Class Codes: A61C 8/0074 with external threads
• CPC Class Codes: A61C 8/0075 Implant heads specially designed for receiving an upper structure if separable from the implant A61C8/005
• CPC Class Codes: A61C 8/0086 with shock absorbing means
• CPC Class Codes: Y10T 29/49567 Dental appliance making

Abstract

A fastener for embedment in bone includes a chevron-shaped thread pattern having a first radial superior surface at an angle beta on a blank relative to a longitudinally extending axis of the fastener, a second radial superior surface at an angle alpha inboard to the first radial superior surface and relative to the longitudinally extending axis such that the two superior surfaces form a V-shape geometry. The fastener further includes a flank surface underlying the second radial superior surface at an angle gamma, the angle gamma defining an angle with the longitudinally extending axis that is 90°, a relief surface underlying the first radial superior surface such that the flank surface and the relief surface form a V-shape geometry, and a radially-outermost surface adjacent to the relief surface and defining a major diameter of the thread pattern, the radially-outermost surface being parallel to the longitudinally extending axis of the fastener.

Claims

1. A fastener for embedment in bone, comprising:

a thread pattern which is chevron-shaped in section and has a first radial superior surface cut at an angle beta relative to a longitudinally extending axis of the fastener and has a second radial superior surface cut at an angle alpha inboard to the first radial superior surface and relative to the longitudinally extending axis such that the two superior surfaces cooperate to form a V-shape geometry;

a flank surface underlying the second radial superior surface relative to a direction of embedment in the bone, and cut at an angle gamma, the angle gamma defining an angle with the longitudinally extending axis that is 90°

;

a relief surface underlying the first radial superior surface relative to the direction of embedment in the bone, and cut at an acute angle outboard to the flank surface and relative to the longitudinally extending axis, such that the flank surface and the relief surface cooperate to form a V-shape geometry; and

a radially-outermost surface adjacent to the relief surface and defining a major diameter of the thread pattern, the radially-outermost surface being parallel to the longitudinally extending axis of the fastener.