NDLI: Granule size-dependent bone regenerative capacity of octacalcium phosphate in collagen matrix.

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Granule size-dependent bone regenerative capacity of octacalcium phosphate in collagen matrix.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Tanuma, Yuji Anada, Takahisa Honda, Yoshitomo Kawai, Tadashi Kamakura, Shinji Echigo, Seishi Suzuki, Osamu
Description	Country affiliation: Japan Author Affiliation: Tanuma Y ( Division of Oral Surgery, Graduate School of Dentistry, Tohoku University, Aoba-ku, Sendai, Japan.)
Abstract	The present study was designed to determine whether the osteoconductivity of octacalcium phosphate-collagen (OCP/Col) composite can be improved by controlling the granule size of OCP. The granules of synthetic OCP, with diameters in the range of 53 to 300, 300 to 500, and 500 to 1000 µm, were used as an inorganic source of composite materials mixed with atelo-Col. After vacuum dehydrothemal treatment, OCP/Col disks were implanted into critical-sized calvaria defects in Wistar rats for 4, 8, and 12 weeks and examined radiographically, histologically, histomorphometrically, and histochemically. The materials were characterized according to mercury intrusion porosimetry and scanning electron microscopy. X-ray diffraction was performed before and after implantation. The dissolution of OCP crystals in a Col matrix was determined by immersing OCP/Col disks in a culture medium. OCP/Col had a constant pore size (~30 µm) regardless of OCP granule size. OCP in the Col matrix tended to convert to hydroxyapatite (HA) during the implantation. OCP/Col with the smallest granules of OCP enhances both bone regeneration and biodegradation the most through tartrate-resistant acid phosphatase (TRAP)-positive osteoclastic cellular resorption of OCP granules. The smallest OCP granules in the Col matrix showed the highest dissolution and had the greatest potential to form HA. The results indicated that the size of the included OCP granules can controll the osteoconductivity of OCP/Col. The overall results suggest that the physicochemical property of OCP crystals is a factor that determines the bone regenerative capacity of OCP/Col in critical-sized calvaria large bone defects in rats.
File Format	HTM / HTML
ISSN	21524947
e-ISSN	21524955
DOI	10.1089/ten.TEA.2011.0349
Journal	Tissue Engineering Part A
Issue Number	5-6
Volume Number	18
Language	English
Publisher	Mary Ann Liebert, Inc.
Publisher Date	2012-03-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Biotechnology Bone Regeneration Bone Substitutes Chemistry Calcium Phosphates Collagen Materials Testing Skull Injuries Animals Metabolism Extracellular Matrix Rats, Wistar Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article

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Granule size-dependent bone regenerative capacity of octacalcium phosphate in collagen matrix.

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