title: A Four-Year Survival Rate Multicenter Prospective Clinical Study on 377 Implants: Correlations Between Implant Insertion Torque, Diameter, and Bone Quality.
abstract: The purpose of this study was to evaluate the survival rate and incidence of prosthetic complications in 377 implants with a double octagon connection. Furthermore, the correlations among implant dimensions (diameter and length), bone quality, and insertion torque were investigated. A 4-year multicenter prospective clinical study was designed to evaluate the survival rate of 377 dental implants inserted in 189 patients between January 2004 and April 2010. After an average follow-up of 46 months, the implant survival rate was 99.7%, and the incidence of complication was 0.53%. Moreover, insertion torque was statistically related in a significant way to implant diameter. The connection system seemed to reduce the risk that the prosthetic component screw would loosen. Within the limits of this study, it was observed that a wider diameter corresponded to a higher implant primary stability. Implant length did not seem to be critical in obtaining higher primary stability.
authors: 1  Oral Surgery and Implantology, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milano, University of Milan, Milan, Italy.
authors: Carlo
authors: C
authors: Maiorana
authors: 2  Department of Implantology, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milano, University of Milan, Milan, Italy.
authors: Davide
authors: D
authors: Farronato
authors: 2  Department of Implantology, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milano, University of Milan, Milan, Italy.
authors: Stefano
authors: S
authors: Pieroni
authors: 3  Department of Human Pathology, Dental School, University of Messina, Messina, Italy.
authors: Marco
authors: M
authors: Cicciu
authors: 2  Department of Implantology, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milano, University of Milan, Milan, Italy.
authors: Dario
authors: D
authors: Andreoni
authors: 4  Dental Clinic, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milano, University of Milan, Milan, Italy.
authors: Franco
authors: F
authors: Santoro
mesh_terms: D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D006801:Humans; D011446:Prospective Studies; D019415:Torque
chemical_list: D015921:Dental Implants
keywords: bone quality; dental implants; torque