SYSTEM AND METHOD FOR IMPROVING CEMENT RETENTION IN IMPLANT-SUPPORTED ABUTMENT

摘要

The current disclosure is directed to a dental implant system and method that modifies the screw access channel of an implant-supported abutment in order to improve cement retention within the abutment chamber and to improve retention strength of prosthesis. The cement-retaining system comprises an abutment screw and a longitudinal extension of the abutment screw that channels excess cement into the chamber. The extension may be made from a variety of materials, including metal alloys, plastic materials, or materials that have a low melting point and can be removed in order to allow easy access to the screw head. In one implementation, the extension is affixed at the head of an abutment screw. In other implementations, the extension and the abutment screw are a continuous unit. Experiments demonstrate that the extension increases the volume of cement within the abutment chamber and improves the retention ability of the abutment-restoration complex.

主权项

1. A cement-retaining abutment screw comprising:
a shaft having a head and a threaded end, the threaded end having external threading that is adapted to engage with a threaded socket in a dental implant; and an extension, at the head of the shaft, which channels excess cement into an abutment chamber.