|Support type:||Scholarships in Brazil - Doctorate|
|Effective date (Start):||January 01, 2011|
|Effective date (End):||June 30, 2014|
|Field of knowledge:||Health Sciences - Dentistry|
|Principal Investigator:||Eduardo Piza Pellizzer|
|Grantee:||Joel Ferreira Santiago Junior|
|Home Institution:||Faculdade de Odontologia (FOA). Universidade Estadual Paulista (UNESP). Campus de Araçatuba. Araçatuba , SP, Brazil|
The scientific literature is still scarce about the influence of different surfaces biomechanics of implants in bone types III and IV. It is known that the geometries of morse-taper implants and switching platform may decrease bone loss, yet no studies on bone of low quality. Separate assessments of dental implants in the distribution of tensions over the implant surface and different geometries are also not reported in the literature, its manifestations and implications in clinical practice has not been completely clarified, and the scientific basis needed, since the bones III and IV show the highest loss rate of dental implants. The objective of this research is to evaluate the influence of different surfaces of dental implants unitary system with connection extern hexagonal, Platform Switching and cone Morse in bone type III and IV using the finite element method in three dimensions. For the study, will be developed 12 models, each model represents a section of the bone mandibular (cancellous and cortical bone) with the presence of only one implant (Master Screw Connection, São Paulo, Brazil) hexagonal of 5.00 x 10 mm (8 models) and morse-taper implant of 5.00 x 10 mm (four models) with feldspathic porcelain crowns. Will simulate two types of implant surface (machined and anodized) and different types of geometry (extern hexagonal, platform switching and Morse taper). For the fabrication of models will be used assisted design programs: Rhinoceros ® 3D 3.0 (NURBS Modeling for Windows, USA) and SolidWorks ® 2006 (SolidWorks Corp., Massachusetts, USA). The three-dimensional drawings will be exported to the finite element program NEI Nastran ® 9.0 (Noran Engineering, Inc, USA) for discrimination of the regions, mesh generation, load application and analysis. The results will be displayed through maps of Von Mises stress and Maximum Principal Stress of each model, to assess individual variations in the distribution of stresses in the implant, crown and bone.