Complicaciones mecánicas en prótesis fijas implantosoportadas

Abstract

Fixed partial dentures on implants is a common therapeutic option. Mechanical complications are the most common of all the problems that can be found in this type of prostheses. Study the mechanical complications of fixed dental prostheses on implants placed on the Postgrade of Oral Implantology of the University of the Basque Country. These implants were placed between 2005 and 2010. Analise the mechanic complications of the different implant brands and of the different types of restaurations that could be either cemented or screwed. A clinical, observational and transversal investigation study was designed. It is also considered a retrospective study because we obtained information from the case history of each patient. The sample consisted of all the patients that had a fixed partial prostheses from the years 2005 to 2010. Hybrid prostheses were excluded. 60 patients took part of the study with a total of 171 implants. The risk of complications is of 60%. The main complication was the fracture of the porcelain with a cumulative incidence of 30%. The descementation had a cumulative incidence of 22% and the loosening of the screw had a 6% of incidence. The risk of the rest of events is very low. There are no significant differences between the two implant brands included on the stud, Straumann and Nobel Biocare, in relation to having a complication with a Chi squared of 0,89 and a p=0,3467. No difference was found between the screwed prostheses and the cemented prostheses with a Chi squared of 0,13 and a p of 0.7222 considering the result non significant.