BACKGROUND: A recently introduced implant, the NobelDirect (Nobel Biocare AB, Göteborg, Sweden), has previously been documented with substantial bone resorption in a large number of operated cases. PURPOSE: The aim of this study was to evaluate the failure rate of NobelDirect implants in a retrospective multicenter survey. MATERIALS AND METHODS: A total of 550 NobelDirect implants consecutively placed in over 269 patients at 18 centers were evaluated with regard to failure rate after an average follow-up of about 1 year. RESULTS: The overall failure percentage was 10.9% (59 failures). The 58 implants not loaded directly showed only one failure (1.7%) versus 58 failures (11.8%) of those implants that were loaded directly. A chemical x-ray photoelectron spectroscopy analysis of an implant from the original batch showed up to 3.5% silicon at parts of the implants. A retrieval analysis of one implant removed at 2 years after placement demonstrated bone resorption down to the level of the fifth thread. CONCLUSIONS: It is concluded that the NobelDirect implant, if placed with a punch procedure, ground down in situ, and loaded directly, shows an unusually high failure rate at 1 year.
BACKGROUND: A recently introduced implant, the NobelDirect (Nobel Biocare AB, Göteborg, Sweden), has previously been documented with substantial bone resorption in a large number of operated cases. PURPOSE: The aim of this study was to evaluate the failure rate of NobelDirect implants in a retrospective multicenter survey. MATERIALS AND METHODS: A total of 550 NobelDirect implants consecutively placed in over 269 patients at 18 centers were evaluated with regard to failure rate after an average follow-up of about 1 year. RESULTS: The overall failure percentage was 10.9% (59 failures). The 58 implants not loaded directly showed only one failure (1.7%) versus 58 failures (11.8%) of those implants that were loaded directly. A chemical x-ray photoelectron spectroscopy analysis of an implant from the original batch showed up to 3.5% silicon at parts of the implants. A retrieval analysis of one implant removed at 2 years after placement demonstrated bone resorption down to the level of the fifth thread. CONCLUSIONS: It is concluded that the NobelDirect implant, if placed with a punch procedure, ground down in situ, and loaded directly, shows an unusually high failure rate at 1 year.
Authors: Tomas Albrektsson; Pentti Tengvall; Luis Amengual-Peñafiel; Pierluigi Coli; Georgios Kotsakis; David L Cochran Journal: Clin Implant Dent Relat Res Date: 2022-05-31 Impact factor: 4.259
Authors: José Luis Calvo-Guirado; Carlos Pérez-Albacete; Antonio Aguilar-Salvatierra; José E de Val Maté-Sánchez; Rafael A Delgado-Ruiz; Marcus Abboud; Eugenio Velasco; Gerardo Gómez-Moreno; Georgios E Romanos Journal: Clin Oral Investig Date: 2014-12-11 Impact factor: 3.573
Authors: Michelle Bowers; Daniel Yoo; Charles Marin; Luiz Gil; Nour Shabaka; Matt Goldstein; Malvin Janal; Nick Tovar; Ronaldo Hirata; Estevam Bonfante; Paulo Coelho Journal: Med Oral Patol Oral Cir Bucal Date: 2016-03-01