Relevant Aspects Of Implant Design On Periimplant Bone Loss U00f1 5 Years Prospective Clinical Trial

Download or read book Relevant Aspects of Implant Design on Periimplant Bone Loss U00f1 5-years Prospective Clinical Trial written by Oliveira Guilherme and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Background: Periimplant bone loss can jeopardize both the functional and esthetical outcomes of implant treatment. Several biological (i.e. formation of biological width, implant-abutment gap bacterial contamination) and biomechanical (i.e stress/strain concentration caused by an excessive dynamic loading) hypothesis for changes in crestal bone height have been suggested. However, the relative contribution of relevant aspects of implant design on marginal bone loss have not been determined. Aim: to evaluate clinical, bacteriological, and biomechanical parameters related to marginal bone loss, comparing external hex (EH) and Morse-taper (MT) connections, threaded (Th) and non-threaded (nTh) crestal modules and crestal module with and without (wT) surface treatment.Materials and methods: Twelve patients received four custom made u00d8 3.8 x 13 mm implants (MT Th, MT nTh, EH Th, MT Th wT), randomly placed based on a split-mouth design. Clinical parameters were evaluated at 6 sites around the implants, at a 12 month follow-up. The distance from the top of the implant to the first bone-to-implant contact u2013 IT-FBIC was evaluated on standardized digital peri-apical radiographs acquired at 1, 3, 6, 12, 36, and 60 months follow-up. Samples of the subgingival microbiota were collected 1, 3 and 6 months after implant loading. DNA were extracted and used for the quantification of Tf, Aa, Pi and Fn. Comparison among multiple periods of observation were performed using repeated-measures Analysis of Variance (ANOVA), followed by a Tukey post-hoc test, while two-period based comparisons were made using paired t-test. Further, 36 computer-tomographic based finite element (FE) models were accomplished and relevant biomechanical aspects were interpreted by means of ANOVA. Results: After 5 years follow-up, the variation in periimplant bone loss assessed from the radiographs was different between all aspects of crestal module design (p