Armando Lopes1, Paulo Maló1, Miguel de Araújo Nobre2, Elena Sanchez-Fernández3. 1. Department of Oral Surgery, Maló Clinic, Lisbon, Portugal. 2. Research and Development, Maló Clinic, Lisbon, Portugal. 3. Oral Surgery and Implant Dentistry Department, School of Dentistry, University of Granada, Granada, Spain.
Abstract
BACKGROUND: There is a need for long-term studies on complete edentulous flapless rehabilitations. PURPOSE: This study aimed to evaluate the long-term outcomes of the rehabilitation of completely edentulous jaws for immediate function with the All-on-4® treatment concept using a computer-guided surgical protocol (NobelGuide®, Nobel Biocare, Göteborg, Sweden). MATERIALS AND METHODS: This prospective clinical study included 23 totally edentulous patients rehabilitated between February 2005 and May 2006 with 92 implants with the All-on-4 treatment concept using NobelGuide. Outcome measures were implant survival, marginal bone loss at 1, 3, and 5 years, and the incidence of mechanical and biological complications. Survival was calculated using life-table analysis. RESULTS: Two dropouts occurred. The cumulative implant survival rate was 96.6% at 5 years of follow-up. Prosthetic survival was 100%. The average marginal bone loss was 1.7 mm (standard deviation 1.4 mm) at 1 year, 1.7 mm (standard deviation 0.9 mm) at 3 years, and 1.9 mm (standard deviation 1.1 mm) at 5 years. Seven patients experienced fracture of the definitive prosthesis (6 patients were heavy bruxers), and abutment screw loosening occurred in 2 patients. Two implants in 2 patients showed peri-implant pathology. CONCLUSIONS: Within the limitations of this study, it is possible to conclude that this treatment modality for completely edentulous jaws is safe and predictable with good long-term outcomes.
BACKGROUND: There is a need for long-term studies on complete edentulous flapless rehabilitations. PURPOSE: This study aimed to evaluate the long-term outcomes of the rehabilitation of completely edentulous jaws for immediate function with the All-on-4® treatment concept using a computer-guided surgical protocol (NobelGuide®, Nobel Biocare, Göteborg, Sweden). MATERIALS AND METHODS: This prospective clinical study included 23 totally edentulouspatients rehabilitated between February 2005 and May 2006 with 92 implants with the All-on-4 treatment concept using NobelGuide. Outcome measures were implant survival, marginal bone loss at 1, 3, and 5 years, and the incidence of mechanical and biological complications. Survival was calculated using life-table analysis. RESULTS: Two dropouts occurred. The cumulative implant survival rate was 96.6% at 5 years of follow-up. Prosthetic survival was 100%. The average marginal bone loss was 1.7 mm (standard deviation 1.4 mm) at 1 year, 1.7 mm (standard deviation 0.9 mm) at 3 years, and 1.9 mm (standard deviation 1.1 mm) at 5 years. Seven patients experienced fracture of the definitive prosthesis (6 patients were heavy bruxers), and abutment screw loosening occurred in 2 patients. Two implants in 2 patients showed peri-implant pathology. CONCLUSIONS: Within the limitations of this study, it is possible to conclude that this treatment modality for completely edentulous jaws is safe and predictable with good long-term outcomes.
Authors: Otávio Augusto Luitz Jaros; Geraldo Alberto Pinheiro De Carvalho; Aline Batista Gonçalves Franco; Simone Kreve; Paulo Augusto Batista Lopes; Sergio Cândido Dias Journal: J Int Soc Prev Community Dent Date: 2018-10-08