Perda óssea marginal de implantes em levantamento de seio maxilar com 100% de matriz óssea bovina inorgânica : avaliação clínica e radiográfica de até 4 anos

• Ano de defesa: 2015
• Autor(a) principal: Dinato, Thiago Revillion
• Orientador(a): Grossi, Márcio Lima
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Pontifícia Universidade Católica do Rio Grande do Sul
• Programa de Pós-Graduação: Programa de Pós-Graduação em Odontologia
• Departamento: Faculdade de Odontologia
• País: Brasil
• Palavras-chave em Português: ODONTOLOGIA; IMPLANTODONTIA; TRANSPLANTE ÓSSEO; MAXILARES - CIRURGIA; REPARAÇÃO ÓSSEA (ODONTOLOGIA)
• Área do conhecimento CNPq: CIENCIAS DA SAUDE::ODONTOLOGIA
• Link de acesso: http://tede2.pucrs.br/tede2/handle/tede/6191

Aims: To evaluate survival rates for implants after maxillary sinus augmentation using anorganic bovine bone (ABB) by means of clinical and radiographic evaluation; evaluate the marginal bone loss (MBL) around implants placed in this grafted areas; and compare the implants MBL with the clinical variables gathered. Methods: Subjects seeking implant placement in the posterior maxilla with bone availability ≤7mm were selected for this retrospective study in a private clinic in Porto Alegre, Brazil. A total of 55 implants (morse tapered) were placed in 30 grafted maxillary sinuses of 24 patients (mean age 59.3 years). The clinical variables were age, sex, ABB quantity per sinus, implant length and diameter, height of prosthetic abutment, teeth replaced, timing of implant placement, flap elevation, and type of restoration. Two periapical radiographs were evaluated after the distortion rate calculation for the implant MBL measurement (0-6 months after implant placement and the most recent). Results: The survival rate was 98.2%, with only one implant lost (100% survival rate after loading) with a mean follow-up time of 2 years ± 0.9 years. The MBL ranged from 0 to 2.85mm; 75.9% of mesial and 83.4% of distal sites showed <1 mm of MBL, while 35.2% of mesial and 37% of distal sites exhibited no bone loss. The MBL was greater in open flap surgery than in flapless surgery, with statistical significance difference. Conclusion: Within the limitations of this study we can conclude that maxillary sinus elevation with 100% anorganic bovine bone has predictable result; the result of 98.2% implant survival rate encourage to perform implant placement in grafted sinus; flapless surgery results in less marginal bone loss when compared to traditional open flap surgery.