Patent ID: 11877908
Assignee: nan
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A tooth replacement assembly for affixing a dental prosthesis to a dental implant affixed to a jaw bone of a patient, the tooth replacement assembly comprising:
(a) an abutment having a first end configured to securely engage with the dental implant and having a second end with a female threading surrounded by a tapered upper profile wall;
(b) the dental prosthesis having, at a first end facing the abutment, an outwardly tapering opening shaped and dimensioned so as to be snugly engageable with the tapered upper profile wall of the abutment and, at a second end, a receiving surface, the outwardly tapering opening and receiving surface connected by a receiving channel having a channel diameter; and
(c) an abutment screw comprising:
a head; and
a body,
the body comprising:
a shank having a smooth portion immediately proximate the head and having a first diameter that is about the same as the channel diameter, and
a threaded portion axially aligned with, and distally spaced from, the smooth shank portion, the threaded portion beginning at a point along the shank which is most distal the head, the threaded portion having a second diameter, wherein the first diameter is greater than the second diameter; and

the head comprising:
an upper surface, having a drive at a central portion thereof and a curved surface, and
an underside surface having a convex radiused curvature extending until it meets the shank, the convex radiused curvature being configured to conform to a corresponding concave curvature of the receiving portion of the prosthesis,
and

wherein the screw is configured to be tightened, by application of twisting force to the drive, so that the threaded portion of the body of the screw threadingly engages the female threading of the abutment, thus causing the convexed radiused curvature of the screw head to securely mate with the corresponding concave curvature of the receiving portion of the prosthesis.