DOI: 10.36347/sjds.2019.v06i08.003

Pages: 368-372

Passive and precise fit in the implant/ abutment connection is an important and primordial parameter for the longevity of implant-supported prostheses. This paper presents a long follow up of tight tolerances on dental implants and abutments tolerances in order to guarantee the repeatability of the parts measurement and their perfect adjustment. The aim of this study is to: 1) Measure the implant and abutment hexagonal dimensions. 2) Measure the rotational misfit between implant and abutments. 3) Verify the stability of the dimensions during a long run production.The quality of the connection between an implant and an abutment is depending of the surface finish of the six facets sides, the circumscribed circle dimension and their tolerances. The follow up indicate that with high level of quality control you can assure in long-term a high accuracy of all the components that is one of the parameters that induce to a significantly better long-term stability in the clinical application.