Effect of different designs of short implants on stress distribution of implant-supported prosthesis

• Grant number: 12/21522-2
• Support type: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): July 01, 2013
• Effective date (End): December 31, 2013
• Field of knowledge: Health Sciences - Dentistry - Dental Clinics
• Principal researcher: Marcelo Coelho Goiato
• Grantee: Taynara Maria Toito de Lima
• Home Institution: Faculdade de Odontologia (FOA). Universidade Estadual Paulista (UNESP). Campus de Araçatuba. Araçatuba , SP, Brazil

Abstract

The bone loss due to tooth loss does result of installing the implant in these areas a challenge. Seeking solution for these cases, many researches have been conducted with implants of shorter length than the conventional. One big question has been how the charge distribution occurs in the use of short implants, which casts doubts as to its longevity after loading. Thus, this study will evaluate, by photoelastic analysis, the biomechanical behavior of screwed prosthesis implant with different types of implants short, larger diameter, with crowns single and 3-unit piece, compared with conventional implants. For this purpose, will be made in six models photoelastic PL-2 resin, four with implant (Osteofit), hexagonal (HE) of 5 x 5 mm cylindrical and conical (Flexcone)and two of 5x11,5mm cylindrical implants. For each type of implant will be made crowns single and 3-unit piece. Models will be positioned in a circular polariscope and 100-N axial and oblique (45 degrees) loading will applied in the occlusal surface of the crowns by using a universal testing machine (EMIC). The stresses were photographically recorded and qualitatively analyzed using a software (Adobe Photoshop). The photographic records of the samples will be analyzed to determine the direction of propagation and intensity of stress, according to the qualitative analysis. To facilitate the analysis will be divided as follows: in accordance with the number of fringes of high intensity (green transition pink) in accordance with the area of stress distribution.