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Comparative study on bone regeneration by synthetic octacalcium phosphate with various granule sizes

Paper ID Volume ID Publish Year Pages File Format Full-Text
2532 114 2010 7 PDF Available
Title
Comparative study on bone regeneration by synthetic octacalcium phosphate with various granule sizes
Abstract

The present study was designed to investigate whether the granule size of synthetic octacalcium phosphate (OCP) and the resultant intergranular spaces between the granules formed by the filling affect its osteoconductive and biodegradable characteristics in a mouse calvaria critical-sized defect up to 10 weeks after implantation. Mercury intrusion porosimetry showed that OCP granules having distinct diameter sizes ranging from 53 to 300 (S-OCP), 300 to 500 (I-OCP) and 500 to 1000 μm (L-OCP) produced distinct intergranular spaces between OCP granules ranging from 28.8 to 176.6 μm. The dissolution rate of OCP, estimated by the phosphate concentration in the culture medium, was the highest in S-OCP, followed by I-OCP and L-OCP, while the specific surface area of OCP decreased. Histological and histomorphometric analyses showed that bone formation around the implanted granules increased significantly with increasing granule size coupled with activating the appearance of TRAP- and cathepsin K-positive osteoclastic cells. The rate of new bone formation formed with L-OCP was two times higher than that formed with S-OCP at 10 weeks after implantation. The results indicated that the osteoconductive and biodegradable properties of OCP can be augmented by increasing the granule size, most probably by thus providing enough spaces between the granules, suggesting that the intergranular spaces formed by the granules may work similarly to pores, as reported in porous ceramic materials. It seems likely that the enhancement of bone formation by OCP is accompanied by simultaneous activation of osteoclastic resorption of OCP.

Keywords
Octacalcium phosphate; Granule; Bone regeneration; Biodegradation; Osteoclasts
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Comparative study on bone regeneration by synthetic octacalcium phosphate with various granule sizes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 6, Issue 4, April 2010, Pages 1542–1548
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us