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Survival Rate of Ultrawide Diameter Implants Placed Into Molar Postextraction Sockets

Now online in the Journal of Prosthodontics, a retrospective study of ultrawide implants co-authored by ACP member, Carl Drago DDS, MS, FACP.

Innovations in macroimplant design, specifically ultrawide implants 7.0 mm or greater in diameter, have allowed immediate molar replacement. This retrospective study assessed the survival rates of ultrawide diameter implants (7.0, 8.0, 9.0 mm) immediately placed into molar extraction sockets.

Five hundred forty-four patients (225 male; 319 female) had 563 implants placed. Implants (7.0, 8.0, and 9.0 mm diameter) were selected to best fit within each extraction socket with the narrowest ultrawide diameter implant that achieved primary stability. Five hundred thirty-five of five hundred sixty-three (535/563) implants survived and 28 failed, resulting in a clinical survival rate of 95.03%. Most of the implants (68%) were followed for 1-6 years and all failures occurred within the first year of implant placement.

Over time, notable difference were observed in survival rates of 7.0 mm diameter implants (98%) versus 8.0 mm (94%) and 9.0mm (92%), respectively, and the treatment protocol was modified to select 7.0 mm implants first.

The results of this clinical series indicate that these site-specific, ultrawide diameter implants are viable options for immediate placement following molar extractions. Benefits of this protocol include reduced treatment time for restoration of missing molars, decreased costs, decreased surgical morbidity, potentially improved caries resistance for adjacent teeth, and quicker return to normal masticatory function.

Will MJ, Drago C. Survival rate of ultrawide diameter implants placed into molar postextraction sockets and in function for up to 144 months. J Prosthodont 2022; Accepted Author Manuscript. https://doi.org/10.1111/jopr.13534

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