Histological and Histomorphometric analysis of Ti implants with surfaces modified by anodic spark deposition in Ca and P

Author(s)

Gustavo Cavalcanti de Albuquerque

• Document type: Master's Dissertation
• Press: Ribeirão Preto.
• Institution: Universidade de São Paulo (USP). Faculdade de Odontologia de Ribeirão Preto (PCARP/BC)
• Defense date: 2010-12-20

Examining board members

Adalberto Luiz Rosa; Márcio Mateus Beloti; Walter Martins Junior

• Advisor: Adalberto Luiz Rosa

Abstract

Surface modification of Ti have been attracted the attention of the researchers for existing great interest in treatments that can speed up the physiological process of repair of the bone contact. Aiming to improve the osseointegration of Ti implants several surface treatments have been proposed including those obtained by anodic spark deposition technique (anodic spark discharge ASD). This treatment allows to developing a thin and porous surface layer enriched with selected ions from the electrochemical solution. This study was designed to analyze bone repair adjacent to and in contact with Ti implants with surfaces modified by acid etching (AE) and anodic spark deposition (ASD). Surface modification of Ti implants was carried out by three methods: AE, ASD in calcium and phosphate solution (ASD-AK), and ASD in calcium, phosphate and silicon solution followed by alkali etching in NaOH (SiB-Na). Ten mongrel dogs were submitted to premolar extraction and after 12 weeks AE, BS, and SiB-Na self-screw Ti implants were placed into edentulous areas. Animals were killed at 3 and 8 weeks (five per period) and bone fragments with implants harvested and processed to obtain thin ground sections. Histomorphometric analysis was carried out to determine the bone-implant contact (BIC), bone area between threads (BABT), and bone area adjacent to threads (BAAT). The results had shown that all the treatments (AE, ASD-AK and SiB-Na) had allowed bone formation in direct and adjacent contact to the surface, without qualitative and quantitative difference in the standard of bone repair. Therefore, these surface treatments would have clinically to be evaluated in the implant-supported rehabilitation of total edentulous or patients partial. (AU)

• FAPESP's process: 07/06901-9 - Histological and histomorphometric analysis of Ti fixtures with surface modifications by anodization and Ca and P deposition
• Grantee: Gustavo Cavalcanti de Albuquerque
• Support Opportunities: Scholarships in Brazil - Master