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A Clinical Study of 406 Sinus Augmentations With 100% Anorganic Bovine Bone
Author(s) -
Ferreira Carlos E.A.,
Novaes Arthur B.,
Haraszthy Violet I.,
Bittencourt Márcio,
Martinelli Carolina B.,
Luczyszyn Sonia M.
Publication year - 2009
Publication title -
journal of periodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.036
H-Index - 156
eISSN - 1943-3670
pISSN - 0022-3492
DOI - 10.1902/jop.2009.090263
Subject(s) - medicine , dentistry , radiography , maxillary sinus , sinus (botany) , biopsy , survival rate , significant difference , stage (stratigraphy) , implant , surgery , radiology , biology , paleontology , botany , genus
Background: The aim of the present study is to evaluate the use of anorganic bovine bone (ABB) associated with a collagen membrane (CM) for a sinus graft by means of clinical, histologic, and radiographic parameters in cases with bone availability ≤7 mm. A preliminary evaluation consisted of a clinical examination, computed tomography (CT), and a panoramic x‐ray. Methods: Ninety‐two patients requiring bilateral sinus grafts and 222 requiring unilateral procedures (total: 406 sinuses) participated in this study. A total of 1,025 implants were placed in the grafted sinuses. A total of 118 implants were placed simultaneously with the sinus graft (one stage), and 907 implants were placed in a subsequent surgery (two stages), 6 to 12 months after the graft was performed. In seven cases, a biopsy was harvested for histomorphometric analysis. Recall appointments were scheduled every 6 months, and panoramic and periapical x‐rays were required every year for 3 years. Results: Among 1,025 implants, 19 were lost (survival rate: 98.1%). The difference in survival rates for implants placed in native bone ≤3 mm (98.1%), >3 to ≤5 mm (98.6%), and >5 to ≤7 mm (97.0%) was not statistically significant ( P = 0.3408). The survival rates for implants with rough and machined surfaces (98.6% and 97.0%, respectively) were not statistically significant ( P = 0.0840). The histomorphometric analysis showed new bone formation (39.0% ± 12%), marrow space (52.9% ± 9.3%), and residual ABB (8% ± 2.7%). Conclusion: Our results indicated that 1,025 implants placed in sinuses grafted exclusively with ABB combined with CM led to an excellent and predictable survival rate of 98.1%.