Maxillary sinus floor augmentation in rabbits: a comparative histologic-histomorphometric study between rhBMP-2 and autogenous bone.
The present study was designed to compare recombinant human bone morphogenetic protein-2 (rhBMP-2) impregnated on an absorbable collagen sponge (ACS) with particulate cancellous bone and marrow (PCBM) harvested from the iliac crest in an animal model of maxillary sinus floor augmentation. Bilateral sinus floor augmentation procedures were performed in 30 adult Japanese white rabbits. rhBMP-2/ACS or PCBM was grafted to each maxillary sinus. Animals were sacrificed at 2, 4, or 8 weeks after grafting, and bone formation in response to each implant was evaluated histologically and histometrically. Histometric results compared by analysis of variance revealed no statistically significant difference in the bone volume at augmented areas between the two types of implant (P > 0.05). Histologic evaluation documented that the trabeculae with a lamellar structure were embedded in fatty marrow at 8 weeks in both implant sites. These results suggest that sinus floor augmentation with rhBMP-2/ACS or PCBM induces comparable histologic and histometric evidence of bone formation in rabbits.
Wada
K
K
Department of Oral and Maxillofacial Surgery, Nagoya University Postgraduate School of Medicine, Nagoya, Japan.
Niimi
A
A
Watanabe
K
K
Sawai
T
T
Ueda
M
M
D000540:Alveolar Ridge Augmentation / Q000379:methods*; D000704:Analysis of Variance; D000818:Animals; D016026:Bone Marrow Transplantation / Q000473:pathology; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins / Q000627:therapeutic use*; D016025:Bone Transplantation / Q000473:pathology; D004337:Drug Carriers; D005500:Follow-Up Studies; D005781:Gelatin Sponge, Absorbable; D006801:Humans; D008297:Male; D008437:Maxilla / Q000473:pathology / Q000601:surgery*; D008443:Maxillary Sinus / Q000473:pathology / Q000601:surgery*; D023421:Models, Animal; D010012:Osteogenesis / Q000502:physiology; D011817:Rabbits; D011994:Recombinant Proteins; D018709:Statistics, Nonparametric; D016212:Transforming Growth Factor beta / Q000627:therapeutic use*; D014182:Transplantation, Autologous
C525718:BMP2 protein, human; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins; D004337:Drug Carriers; D011994:Recombinant Proteins; D016212:Transforming Growth Factor beta; C499469:recombinant human bone morphogenetic protein-2