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Annals of the Academy of Medicine, Singapore ; : 911-919, 2007.
Article in English | WPRIM | ID: wpr-348368

ABSTRACT

<p><b>OBJECTIVE</b>This study was designed to investigate the optimal combination of known osteogenic biomaterials with shape conforming struts to achieve calvarial vault reconstruction, using a canine model.</p><p><b>METHODS</b>Eighteen adolescent beagles were divided equally into 6 groups. A critical size defect of 6 x 2 cm traversed the sagittal suture. The biomaterials used for calvarial reconstruction were demineralised perforated bone matrix (DBM), recombinant human bone morphogenetic protein-2 (rhBMP2) and autogenous platelet-rich plasma (PRP). The struts used were cobalt chrome (metal) or resorbable plate. The groupings were as follows: 1) DBM + metal, 2) DBM + PRP + metal, 3) DBM + PRP + resorbable plate, 4) DBM + rhBMP2 + metal, 5) DBM + rhBMP2 + PRP + metal, and 6) DBM + rhBMP2 + resorbable plate. Animals were euthanised at 3 months post-surgery. There was no mortality or major complications. Analysis was performed macroscopically, histologically, and with computed tomography (CT).</p><p><b>RESULTS</b>There was complete bony regeneration in the rhBMP2 groups only. Non-rhBMP2 groups had minimal bony ingrowth from the defect edges and on the dural surface, a finding confirmed by CT scan and histology. PRP did not enhance bone regeneration. Shape conformation was good with both metal and resorbable plate.</p><p><b>CONCLUSION</b>rhBMP2 but not PRP accelerated calvarial regeneration in 3 months. The DBM in the rhBMP2 groups were substituted by new trabecular bone. Shape molding was good with both metal and resorbable plate.</p>


Subject(s)
Animals , Dogs , Biocompatible Materials , Bone Morphogenetic Protein 2 , Bone Morphogenetic Proteins , Pharmacology , Bone Regeneration , Physiology , Models, Animal , Postoperative Care , Recombinant Proteins , Pharmacology , Plastic Surgery Procedures , Skull , Pathology , General Surgery , Transforming Growth Factor beta , Pharmacology
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