Osteoproductivity in Experimentally Induced Cranial Bone Defects in Rabbits

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Oral and Maxillofacial Surgery

Background:

• Autogenous bone grafts are standard in maxillofacial surgery but have limitations like donor site morbidity and unreliable incorporation.
• Alternative bone graft substitutes are needed, with eggshell powder emerging as a viable option.
• Ostrich eggshell particles were investigated for their potential as a bone substitute material.

Purpose of the Study:

• To evaluate the biocompatibility, resorption kinetics, and osteoproductivity of unprocessed, CMC-coated, and gelatin-coated ostrich eggshell particles.
• To compare the efficacy of different ostrich eggshell particle preparations in bone regeneration.

Main Methods:

• Calvarial defects were created in animal models.
• Defect sites were assessed clinically, radiologically, histologically, and histomorphometrically at 1 and 3 months post-implantation.

Main Results:

• Coating ostrich eggshell particles with CMC and gelatin improved surgical handling and promoted new bone formation.
• Unprocessed eggshell particles showed a higher rate of new bone formation at 3 months compared to coated particles.
• CMC coating demonstrated superior bone modeling compared to gelatin coating.

Conclusions:

• Ostrich eggshell particles, in their native form or coated with CMC, can serve as effective bone fillers.
• These materials support new bone formation and enhance healing in osseous defects.
• Ostrich eggshell particles represent a promising alternative to traditional bone grafts.