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Fresh-frozen allografts combined with bovine bone mineral enhance bone formation in sinus augmentation

2014; SAGE Publishing; Volume: 29; Issue: 7 Linguagem: Inglês

10.1177/0885328214552709

1530-8022

Felipe Perraro Sehn, Rafael Rodrigues Dias, Thiago de Santana Santos, Erick Ricardo Silva, Luiz Antônio Salata, Gavriel Chaushu, Samuel Porfírio Xavier,

Orthodontics and Dentofacial Orthopedics

We evaluated histologically, histomorphometrically, and tomographically the effects of the association of fresh-frozen bone allograft (FFB) with bovine bone mineral (BBM) in maxillary sinus floor augmentation. In total, 34 maxillary sinuses from 29 patients, with a mean age of 51.32 (±6.44) years, underwent sinus augmentation. Patients were divided into control and test groups (17 sinuses each). The controls were grafted with allograft bone, and the test group received a combination of FFB and BBM at a 2:1 ratio. After 6 months, bone samples were collected for histological and histomorphometric examinations. The implant survival rates were 93.02% (control group) and 100% (test group) at 6 months after functional loading. Median volumetric reductions of 28.32% (17.05–44.05) and 12.62% (5.65–16.87) were observed for the control and test groups, respectively. Statistically significant histomorphometric differences were found between the control and test groups regarding newly formed bone 12.54% (10.50–13.33) vs. 24.42% (17.62–35.92), p < 0.001, total bone 48.34% (39.03–54.42) vs. 61.32% (50.61–64.96), p = 0.007, and connective tissue 51.66% (45.57–60.97) vs. 39.30% (35.03–49.37), p = 0.007. The addition of BBM to allograft bone in maxillary sinus augmentation resulted in higher percentages of new bone formation and total bone, and permitted implant placement with a low rate of osseointegration failure at the 6-month follow-up.