Marco Degidi1, Diego Nardi2, Gianluca Sighinolfi1, Adriano Piattelli3. 1. Private Practice, Bologna, Italy. 2. Department of Neuromotory and Biomedical Sciences (DIBINEM), University of Bologna, Italy. 3. Department of Medical, Oral, and Biotechnological Sciences, University of Chieti-Pescara, Italy.
Abstract
PURPOSE: The use of the conical coupling connection to support definitive restorations was evaluated in cases involving full acrylic resin or hybrid acrylic resin-composite prostheses. The aim of this study was to evaluate the performance of definitive fixed partial prostheses made with lithium disilicate and supported by coupling connection abutments and healed implants. MATERIALS AND METHODS: The prostheses were placed in the posterior regions of partially edentulous patients; 65 patients received fixed lithium disilicate restorations splinted with conical coupling connections to two implants. Implants were placed into healed sites and fresh extraction sockets. The prostheses were placed after healing periods of 3 months: restorations were followed yearly for 3 years. At each follow-up visit, peri-implant bone levels and pocket depths were recorded. Esthetic, functional, and biologic United States Public Health Services (USPHS) parameters modified by the FDI World Dental Federation study design were assessed at the last follow-up appointments. RESULTS: Two prostheses (3.07%) fractured: one was related to framework design error; one was caused by a car accident. Three patients reported small chips: these restorations were immediately polished. No significant difference involving peri-implant bone and probing levels between the experimental times were found. None of the prostheses became loose. CONCLUSIONS: The results of this research indicated that abutment-prostheses coupling connections were successful within the timeframe of this study.
PURPOSE: The use of the conical coupling connection to support definitive restorations was evaluated in cases involving full acrylic resin or hybrid acrylic resin-composite prostheses. The aim of this study was to evaluate the performance of definitive fixed partial prostheses made with lithium disilicate and supported by coupling connection abutments and healed implants. MATERIALS AND METHODS: The prostheses were placed in the posterior regions of partially edentulouspatients; 65 patients received fixed lithium disilicate restorations splinted with conical coupling connections to two implants. Implants were placed into healed sites and fresh extraction sockets. The prostheses were placed after healing periods of 3 months: restorations were followed yearly for 3 years. At each follow-up visit, peri-implant bone levels and pocket depths were recorded. Esthetic, functional, and biologic United States Public Health Services (USPHS) parameters modified by the FDI World Dental Federation study design were assessed at the last follow-up appointments. RESULTS: Two prostheses (3.07%) fractured: one was related to framework design error; one was caused by a car accident. Three patients reported small chips: these restorations were immediately polished. No significant difference involving peri-implant bone and probing levels between the experimental times were found. None of the prostheses became loose. CONCLUSIONS: The results of this research indicated that abutment-prostheses coupling connections were successful within the timeframe of this study.
Authors: Peter Gehrke; Philip Hartjen; Ralf Smeets; Martin Gosau; Ulrike Peters; Thomas Beikler; Carsten Fischer; Carolin Stolzer; Jürgen Geis-Gerstorfer; Paul Weigl; Sogand Schäfer Journal: Int J Mol Sci Date: 2021-01-17 Impact factor: 5.923
Authors: Peter Gehrke; Simon Burg; Ulrike Peters; Thomas Beikler; Carsten Fischer; Frank Rupp; Ernst Schweizer; Paul Weigl; Robert Sader; Ralf Smeets; Sogand Schäfer Journal: Clin Oral Investig Date: 2021-08-16 Impact factor: 3.573