Análisis In Vitro de la precisión de ajuste de pilares fabricados por Técnica de Adición y Sustracción sobre Implantes, comparación de microfiltración

Abstract

Introduction The literature reveals a high success rate for dental implants as a long-term treatment option for the rehabilitation of missing teeth. However, even when good results are shown, different factors may influence the marginal bone loss of the implant, among which are the design of the implant, platform exchanges, surface treatment, the type of implant-abutment connection and biofilm formation in the micro-gap at the implant-abutment interface. Objective Analyze the precision of the manufactured pillars, with CAD/CAM technology, using the addition and subtraction technique corresponding to laser sintering and machining processes. Materials and method: The methodological design will be experimental in vitro, because the intentional manipulation of the variables is necessary. The sample is made up of eighteen (18) internal hexagonal connection implants, of which 6 abutments are manufactured by means of CAD/CAM and a subsequent laser sintering process, 6 abutments manufactured by means of CAD/CAM and a subsequent machining process. and 6 abutments of the commercial house Bio-horizons. Results: the pillars were observed once submerged in methylene blue, where it was possible to determine that 12 (66.7%) of the pillars in the sample did not present filtration, of which five (41.7%) correspond to the group of the precast pillars, four (33.3%) to the group of machined pillars and, finally, three (25%) of the pillars belong to the group of laser sintered ones. Regarding the pillars that presented leakage, it was evidenced that three (50%) correspond to the pillars that were manufactured by the laser sintering technique, two (33.3%) were part of the group of machined pillars and only one (16, 7) corresponded to the precast group. The data was evaluated using the Fisher's exact statistical test and it is important to highlight that no statistically significant differences were found. Conclusions: When analyzing the precision of the manufactured pillars, with CAD/CAM technology, by means of the addition and subtraction technique corresponding to laser sintering and machining processes, it is possible to conclude that the pillar had a better performance, in terms of filtration. of machined titanium than that of chromium-cobalt made by laser synthesis, without presenting statistically significant differences