Four grafting techniques examined following wound closure
A new in vitrostudy has examined the extent to which wound closure affects graft stability following different grafting procedures. This study concerned one-wall horizontal bone defects.
Bone resorption can occur following augmentation procedures and wound closure can have a further negative impact on bone density. The authors note that this often happens in cases where particulate grafting materials are used.
Four grafting methods were used as part of the study. Implants were placed simultaneously in ten pig mandibles and all grafted defects were outside the mandible’s ridge contour. The techniques used included: guided bone regeneration (GBR) with collagen membrane and particulated xenograft; the same technique plus titanium pins; GBR with non-resorbable titanium-reinforced membrane, particulated xenograft and titanium pins; and lastly an autogenous block graft surrounded by particulated xenograft with collagen membrane.
To test graft stability, cone beam computed tomography (CBCT) scans were taken before and after wound closure. The results showed that wound closure did lead to a significant reduction in horizontal volume in some groups and that GBR procedures with additional membrane fixation showed more favourable outcomes. In terms of graft stability, techniques involving titanium reinforcement or autogenous bone blocks showed the best results.
This study was presented as an e-poster at the 2018 EAO Congress.