J Korean Acad Periodontol JKAPE The Journal of the Korean Academy of Periodontology 0250-3352 2093-0747 Korean Academy of Periodontology 10.5051/jkape.2009.39.3.349 Original Article The effect of the freeze dried bone allograft and gel/putty type demineralized bone matrix on osseous regeneration in the rat calvarial defects Kim Deug-Han Hong Ji-Youn Pang Eun-Kyoung Department of Periodontology, Graduate School of Medicine, Ewha Womans University, Korea. Correspondence: Dr. Eun-Kyoung Pang. Department of Periodontology, Graduate School of Medicine, Ewha Womans University, 911-1, Mok-Dong, Yangcheon-Gu, Seoul, Korea. ekpang@ewha.ac.kr, Tel: 02-2650-2679, Fax: 02-2650-5764 09 2009 30 09 2009 39 3 349 358 25 07 2009 17 09 2009 Copyright © 2009 Korean Academy of Periodontology 2009 Purpose

This study was aimed to evaluate the effect of the Freeze Dried Bone Allograft and Demineralized Bone Matrix on osseous regeneration in the rat calvarial defects.

 Methods

Eight mm critical-sized calvarial defects were created in the 80 male Sprague-Dawley rats. The animals were divided into 4 groups of 20 animals each. The defects were treated with Freeze Dried Bone Allograft(SureOss™), Demineralized Bone Matrix(ExFuse™ Gel, ExFuse™ Putty), or were left untreated for sham-surgery control and were evaluated by histologic and histomorphometric parameters following a 2 and 8 week healing intervals. Statistical analysis was done between each groups and time intervals with ANOVA and paired t-test.

 Results

Defect closure, New bone area, Augmented area in the SureOss™, ExFuse™ Gel, ExFuse™ Putty groups were significantly greater than in the sham-surgery control group at each healing interval(P < 0.05). In the New bone area and Defect closure, there were no significant difference between experimental groups. Augmented area in the ExFuse™ Gel, ExFuse™ Putty groups were significantly greater than SureOss™ group at 2weeks(P < 0.05), however there was no significant difference at 8 weeks.

 Conclusions

All of SureOss™, ExFuse™ Gel, ExFuse™ Putty groups showed significant new bone formation and augmentation in the calvarial defect model.

 alveolar bone loss bone regeneration bone transplantation transplantation, homologous

This study was supported by HANS BIOMED.

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Schematic drawing of calvarial osteotomy defect showing the histomorphometric analysis.

Representative photomicro graph of defect site receiving the sham-surgery at 2 weeks (arrow heads : defect margin ; HE stain, magnification × 20).

Representative photomicro graph of defect site receiving the sham-surgery at 2 weeks (defect margin, PB : pre-existing bone, NB : new bone ; HE stain, magnification × 100).

Representative photomicro graph of SureOss™ at 2 weeks (arrow heads : defect margin ; HE stain, magnification × 20).

Representative photomicro graph of SureOss™ at 2 weeks (defect margin, PB : pre-existing bone, NB : new bone ; HE stain, magnification × 100).

Representative photomicro graph of ExFuse™ Gel at 2 weeks (arrow heads : defect margin ; HE stain, magnification × 20).

Representative photomicro graph of ExFuse™ Gel at 2 weeks (defect margin, PB : pre-existing bone, NB : new bone ; HE stain, magnification × 100).

Representative photomicro graph of ExFuse™ Putty at 2 weeks (arrow heads : defect margin ; HE stain, magnification × 20).

Representative photomicro graph of ExFuse™ Putty at 2 weeks (defect margin, PB : pre-existing bone, NB : new bone ; HE stain, magnification × 100).

Representative photomicro graph of defect site receiving the sham-surgery at 8 weeks (arrow heads : (defect margin ; HE stain, magnification × 20).

Representative photomicro graph of defect site receiving the sham-surgery at 8 weeks (defect margin, PB : pre-existing bone, NB : new bone ; HE stain, magnification × 100).

Representative photomicro graph of SureOss™ at 8 weeks (arrow heads : defect margin ; HE stain, magnification × 20).

Representative photomicro graph of SureOss™ at 8 weeks (defect margin, NB : new bone ; HE stain, magnification × 100).

Representative photomicro graph of ExFuse™ Gel at 8 weeks (arrow heads : defect margin ; HE stain, magnification × 20).

Representative photomicro graph of ExFuse™ Gel at 8 weeks (defect margin, NB : new bone ; HE stain, magnification × 100).

Representative photomicro graph of ExFuse™ Putty at 8 weeks (arrow heads : defect margin ; HE stain, magnification × 20).

Representative photomicro graph of ExFuse™ Putty at 8 weeks (defect margin, NB : new bone ; HE stain, magnification × 100).

Defect Closure (group means ± SD; n=10, %)

*Statistically significant difference compared to surgical control group (P < 0.05).

†Statistically significant difference compared to 2 weeks (P < 0.05).

New Bone Area (group means ± SD; n=10, mm2)

*Statistically significant difference compared to surgical control group (P < 0.05).

†Statistically significant difference compared to 2 weeks (P < 0.05).

Augmented Area (group means ± SD; n=10, mm2)

*Statistically significant difference compared to surgical control group (P < 0.05).

§Statistically significant difference compared to SureOssTM group(P < 0.05).