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Tightening characteristics for screwed joints in osseointegrated dental implants
R L Burguete1, R B Johns, T King
1Department of Mechanical and Process Engineering, University of Sheffield, England.
The Journal of Prosthetic Dentistry
|June 1, 1994
Abstract:
The significance of tightening abutment screws and gold cylinders to osseointegrated fixtures with the correct torque is demonstrated, and a simple relationship between applied torque and screw preload is derived by use of mechanical engineering principles. The principles of a number of tightening methods are outlined and assessments made of their accuracy. The difference between optimum and design torque is highlighted. The necessity and means of achieving optimum torque to ensure a reliable joint in clinical practice is discussed.