Study of prosthetic connections in implantology with tapered conventional and experimental screws: analysis by DNA Checkerboard technique

• Grant number: 14/25400-4
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): March 01, 2015
• Effective date (End): February 29, 2016
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Vinícius Pedrazzi
• Grantee: Isabela Mirales Pires
• Host Institution: Faculdade de Odontologia de Ribeirão Preto (FORP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

Despite the reliability and high success rates related to treatment with implants, failures of implant-supported oral rehabilitation are still persistent. These failures can cause both mechanical damage, such as loosening the retaining screw connections due to instability, as biological damage, such as inflammatory reactions in periimplants tissues due to the occurrence of bacterial leakage along the implant/abutment interface and the subsequent colonization of within the implant and its components. The mechanisms responsible for these mechanical/biological failures of implant systems are not fully elucidated, and changes to the models of prosthetic connections and retaining screws have been developed in order to increase the stability of connections and solve these problems. However, the literature on the ideal of these changes and their determinants involved setting is inconclusive. The objective of this study is to microbiologically evaluate by the DNA Checkerboard hybridization technique, the occurrence of bacterial infiltration from the external environment to the interior of the implant through these different implant/abutment interface in two different implant systems, external hexagonal (HE) and internal triangle (TI), with conventional plane screws and experimental tapered screws of abutments retention.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PITA, MURILLO S.; DO NASCIMENTO, CASSIO; DOS SANTOS, CARLA G. P.; PIRES, ISABELA M.; PEDRAZZI, VINICIUS. Experimental conical-head abutment screws on the microbial leakage through the implant-abutment interface: an invitro analysis using target-specific DNA probes. Clinical Oral Implants Research, v. 28, n. 7, p. e68-e75, JUL 2017. (14/25400-4)