Bone regeneration in rabbit sinus lifting associated with bovine BMP

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Oral and Maxillofacial Surgery

Background:

• Autogenous bone is the gold standard for sinus lifts but causes donor site morbidity.
• Existing techniques using native tissue often require additional grafting materials.
• Biomaterials derived from human or animal sources are alternatives.

Purpose of the Study:

• To evaluate the efficacy of morphogenetic bovine bone protein (BMPb) in augmenting the maxillary sinus floor.
• To compare the osteogenic potential of BMPb combined with various graft materials against controls.

Main Methods:

• Four grafting materials were tested: lyophilized bovine bone powder, collagen flakes, natural HA, and synthetic HA.
• Rabbits were divided into two groups: graft material alone and graft material with 0.5 mg BMPb.
• New bone deposition was assessed over 8 weeks using polyfluorochrome tracers and microscopic examination.

Main Results:

• BMPb-treated animals exhibited 33.34% greater newly formed bone compared to control groups.
• Graft material resorption was generally increased with BMPb, except for natural HA which showed no significant change.
• BMPb demonstrated osteoinductive properties, promoting new bone formation.

Conclusions:

• Morphogenetic bovine bone protein (BMPb) enhances new bone formation in sinus floor augmentation.
• While BMPb shows promise as an alternative to autogenous bone, it may not induce sufficient bone formation alone.
• Further research could optimize BMPb application to mitigate patient discomfort associated with autogenous bone harvesting.