Implant and prosthetic factors associated to peri‐implantitis prevalence

Abstract

Background : Currently, Morse taper (MT) connection implants have gained popularity due to their biological and mechanical advantages. However, other factors related to implant installation and prosthetic features which, mainly, depends of the treatment planning could trigger inflammatory response of the surrounding peri-implant tissues. In order to optimize the long-term prognostic of the treatment with dental implants, there is a need for further analysis of the possible impact of these factors. Aim/Hypothesis : The present cross-sectional multicenter study aimed to assess the association of implant and prosthetic factors to periimplantitis (PI) prevalence in dental treatments with two-pieces MT implants with at least 1 year in function. Materials and Methods : PI was diagnosed based on a stablished case definition, i.e. radiographic marginal bone loss(MBL) *3 mm, bleeding on probing(BOP) and/or a probing depth(PD) *6 mm. The prosthetic factors evaluated were: abutment (width and angulation), transmucosal abutment height, emergence profile (shape and angle), prosthetic fixture distance to the most apical point (peri-implant bone), type of retention (cemented or screwed), artificial gingiva (yes or not), type of prostheses (unitary, multiple, total), radiographic prostheses-abutment gap (ill/well-fitting). The assessed implant factors were: length and diameter, distance to adjacent teeth/implant (adequate or not), implant placement and loading time (immediate/delayed). A logistic regression was performed to determine the significant association to each factor with PI. Firstly, univariate analysis was performed of each independent variable (P < 0.05), and then was expressed by the adjusted odds ratio (OR) and corresponding 95% CI (P < 0.20).