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The effect of simvastatin on bone formation and ceramic resorption in a peri-implant defect model

Paper ID Volume ID Publish Year Pages File Format Full-Text
1980 96 2008 7 PDF Available
Title
The effect of simvastatin on bone formation and ceramic resorption in a peri-implant defect model
Abstract

Experimental use of statins as stimulators of bone formation suggests they may have widespread applicability in the field of orthopaedics. With their combined effects on osteoblasts and osteoclasts, statins have the potential to enhance resorption of synthetic materials and improve bone ingrowth. In this study, the effect of oral and local administration of simvastatin to a β tricalcium phosphate (βTCP)-filled defect around an implant was compared with recombinant human bone morphogenetic protein 2 (rhBMP2). On hundred and sixty-two Sprague–Dawley rats were assigned to treatment groups: local application of 0.1, 0.9 or 1.7 mg of simvastatin, oral simvastatin at 5, 10 or 50 mg kg−1 day−1 for 20 days, local delivery of 1 or 10 μg of rhBMP2, or control. At 6 weeks rhBMP2 increased serum tartrate-resistant acid phosphatase 5b levels and reduced βTCP area fraction, particle size and number compared with control, suggesting increased osteoclast activity. There was reduced stiffness and increased mechanical strength with this treatment. Local simvastatin resulted in a decreased mineral apposition rate at 6 weeks and increased fibrous area fraction, βTCP area fraction, particle size and number at 26 weeks. Oral simvastatin had no effect compared with control. Local application of rhBMP2 increased resorption and improved mechanical strength whereas simvastatin was detrimental to healing. Oral simvastatin was ineffective at promoting either ceramic resorption or bone formation. The effect of statins on the repair of bone defects with graft substitute materials is influenced by its bioavailability. Thus, further studies on the optimal delivery system are needed.

Keywords
Bioceramic; Statin; Implant interface; Bone defect
First Page Preview
The effect of simvastatin on bone formation and ceramic resorption in a peri-implant defect model
Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 4, Issue 1, January 2008, Pages 149–155
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering