Abutment screw with spring-washer - Pending Dental Patent Applications

Abutment screw with spring-washer
United States Patent Application 20030224330
Kind Code A1
Aravena, Ines ; et al. December 4, 2003
Inventors: Aravena, Ines; (Camarillo, CA) ; Kumar, Ajay; (Palmdale, CA)
Correspondence Name and Address: Kenneth S. Barrow
CENTERPULSE USA INC.
Suite 1000
12 East Greenway Plaza
Houston
TX
77046
US
Serial No.: 302070
Series Code: 10
Filed: November 22, 2002
Abstract
A dental retaining screw used to secure dental components, such as abutments, copings, and prosthesis to dental implants. The screw has a body formed from titanium and a spring-washer formed from gold. The spring-washer is adapted to prevent the screw from loosening or losing preload once tightened to the implant. The spring-washer includes an annular body with a plurality of flexible legs extending from the annular body; the legs prevent the screw from coming loose during shipping or while attached to an abutment.