Retention Strength of Conical Welding Caps for Fixed Implant-Supported Prostheses

Purpose: This study evaluated the retention strength of welding caps for Ankylos standard abutments using a pull-out test. Materials and Methods: Each sample consisted of an implant abutment and its welding cap. The tests were performed with a Zwick Roell testing machine with a 1-kN load cell. Results: The retention strength of the welding caps increased with higher abutment diameters and higher head heights and was comparable or superior to the values reported in the literature for the temporary cements used in implant dentistry. Conclusion: Welding caps provide a reliable connection between an abutment and a fixed prosthesis without the use of cement.