A randomized, controlled, multi-centre clinical trial of post-extraction alveolar ridge preservation
Evaluating two extraction socket treatment approaches in cases with substantial socket dehiscenses, this study utilizes histomorphogenic analysis 6 months after the procedure, followed by implant placement. Fourteen percent of implants placed with allograft and a long-term membrane required retreatment whereas no additional procedures were required with the xenogeneic bone and a bi-layer collagen membrane.
  
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