Abstract
Objectives
Despite promising results have shown by osteogenic cell-based demineralized bone matrix composites, they need to be optimized for grafts that act as structural frameworks in load-bearing defects. The aims of this study is attempt to assess the effects of laser perforations on osteoinduction in cortical bone allografts.
Methods
Sixteen wistar rats were divided into two groups according to the type of structural bone allograft; the first: partially demineralized only (Donly) and the second: partially demineralized laser-perforated (DLP). Trans-cortical holes were achieved by Er:YAG laser at a wave length of 2.94 µm in four rows of three holes approximated cylindrical holes 0.5 mm in diameter, with centres 2.5 mm apart. Histologic and histomorphometric analysis were performed at 12 weeks.
Results
Statistical analysis showed significant differences between the 2 groups at 3 months. Results showed that partially demineralized laser-perforated grafts had substantially higher incorporation by woven bone than partially demineralized grafts; yet this difference at the interface gap remained insignificant. In DLP allografts healing at the junction was more complete and a wider area was in contact with host and graft surfaces.
Conclusions
Based on the results of this study, it may be concluded that surface changes induced by Er:YAG laser, accelerated bone healing with good osteoinduction results and the process might have improved, if they could have been supplemented with the proper stipulations.
