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Evaluation of the influence of a change in the design of cylindrical and conical implants in primary stability, by insertion torque and pullout test

Grant number: 14/06235-2
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): June 01, 2014
Effective date (End): May 31, 2015
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal researcher:Andréa Cândido dos Reis
Grantee:Beatriz Tostes de Figueiredo
Home Institution: Faculdade de Odontologia de Ribeirão Preto (FORP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil


The primary or initial stability of dental implants, determining for osseointegration, depends on several factors, which may be related to patients as bone volume and density and the implant, such as the shape, surface treatment, prosthetic connection, dimension. It is believed that the main factor related to the implant is its format, however, the literature shows no studies that quantify this influence. The objective of this study is to evaluate and quantify the primary stability, comparing implants with different shapes modified conventional implants. In the study 20 Neodent ® implants are used: 10 cylindrical morse taper (Titamax CM - 4.0 x 11 mm), and 10 tapered cone morse implants (CM Alvim - 4.3 x 10 mm), and 10 cylindrical implants and 10 taper implants modified. The screws will be installed in artificial bone National ® brand densities of 20 and 40 PCF. In the first stage of the project, conventional implants will be subject to the insertion torque, with the aid of a manual ratchet and testing pullout with a universal testing machine Manufacturer Model Emic DL - 10000 and Software Tesc 3.13. In the second step , the design of the implants undergo a change, by making three notches around the bolt body, after this change the implants will be inserted again into the substrate to perform the insertion torque and pullout test. To obtain the results of the statistical processing will receive data in order to make a comparison between the modified and conventional implants.