Interface osso-implante dental de titânio produzida por cirurgia piezoelétrica

• Ano de defesa: 2011
• Autor(a) principal: Kfouri, Flávio de Ávila [UNIFESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de São Paulo (UNIFESP)
• Palavras-chave em Português: Eletrocirurgia; Implantes dentários; Regeneração óssea; Técnicas histológicas; Osteointegração; Coelhos
• Link de acesso: http://repositorio.unifesp.br/handle/11600/9771

INTRODUCTION: Regarding the success of osseointegration, injuries and traumas caused to bone tissues during the placement of titanium implants are clinical concerns. Drills commonly used in the procedures may generate excessive heat, leading to necrosis. The new piezoelectric technique was tested to determine whether it is less damaging to the surrounding tissues. OBJECTIVE: To evaluate bone remodelling at the interface bone-implant using ultrasound in rabbit tibiae, and compare with results using conventional technique. METHODS: Ninety-six implants were installed and assessed on postoperative days (PO) 7, 14, and 28 by histomorphometry. Trabecular thickness, number, and separation, and area and volume of periimplant bone were measured using specific software. RESULTS: Bone volume was similar for both techniques, with a trend toward an increase for the piezoelectric technique on PO 28. Reduction in trabecular thickness was observed in both methods, but then returning to normal values. Trabecular number increased up to PO 14, and remained constant afterwards. The contact area remained constant for the piezoelectric technique at the 3 time points; for the conventional technique, it was small at first, but showed no difference in values between techniques on PO 28. CONCLUSION: The piezoelectric technique induced bone formation for osseointegration of titanium implants, was not associated with occurrence of bone necrosis, and provided results similar to those using the conventional technique. Therefore, the piezoelectric ultrasound technique can be considered a viable alternative for clinical use in implantology.