Threaded implant design criteria.

The amount and quality of available bone dictate the size and type of root form implants to be placed by the clinician. This paper discusses the engineering mechanics of the 3.25 mm and 3.8 mm threaded implants, including the rationale of the thread design, surface area comparison, material strength, mechanical fatigue analysis, the optimum torque worench settings required for tightening the screws, and the results of threaded implant torque-out tests using a baboon model.