Influence of Matrix-Suspended Demineralized Bone on Osseous Repair Using a Critical-Sized Defect in the Rat (Rattus norvegicus) Calvarium

Abstract

Demineralized freeze-dried bone (DFDB) in matrix form must be rehydrated with a carrier medium which allows for easy manipulation during periodontal surgery. The purpose of this study was to evaluate how human DFDB suspended in a polyol matrix affects new bone formation in the rat calvarium critical-sized defect (CSD) model. Fifty-five adult male Harlan Sprague-Dawley rats were assigned to 1 of 5 treatment groups: polyol, 100% DFDB, 47% DFDB/polyol, 47% DFDB, or an unfilled control. They were then placed into 8-m calvarial CSDs. The bone donor source company for the DFDB and DFDB/polyol groups was the same. Calvaria were harvested 10 weeks after surgery and evaluated histomorphometrically. The diameter of bone particles from the 3 groups containing DFDB was measured by scanning electron microscopy. There was no statistically significant difference in the percentage of bone fill between any of the groups, although the 100% DFDB group exhibited the most bone fill. The 47% DFDB/polyol and 47% DFDB groups had similar amounts of bone formation. The average size of the demineralized bone particles from the 100% DFDB group was significantly smaller than that of the other 2 groups containing DFDB. Adding a polyol to DFDB produced similar osseous regeneration in the rat calvarium defect model vs DFDB alone. Yet from a clinical standpoint, the polyol enhanced graft handling and stability. Graft particle size may have an effect on bone fill.

Use of Cuban Granulated Β-Tricalcium Phosphate “Biograft-G” as Maxilar Bone Graft

“…Similar observations have been reported by other authors, e.g. Kalish et al [17], that attribute the granules exfoliation to the Filling of dental sockets 108 60,7…”

Titanium-Enriched Hydroxyapatite–Gelatin Scaffolds with Osteogenically Differentiated Progenitor Cell Aggregates for Calvaria Bone Regeneration

“…1), which have been previously described. [22][23][24] Briefly, 11-to 13-week-old Sprague-Dawley rats (Charles River) were anesthetized and a CSD was created on the calvaria bone using a dental trephine drill. Calvaria defects were assigned to the following experimental groups listed in Table 1.…”

The Effects of Nonvascularized Versus Vascularized Bone Grafting on Calvarial Defect Healing

“…[1][2][3][4][5][6][7][8] It remains uncertain whether bone graft vascularity affects basic mechanisms of dural osteogenesis. Despite this incomplete understanding, the calvarial defect model has been applied within hundreds of basic science studies in the plastic surgery literature, which may confound results when studying the effectiveness of various bone substitutes.…”