This study wanted to assess if one layer vs double layer membrane to cover the grafting site in post-extractive socket may have a different efficacy profile. The experiments were conducted in six dogs. Each dog received the extraction of 4 teeths per side in the lower-jaw. Three post extractive alveoli were filled with bone substitute of equine origin and then covered with: collagen bioresorbable membrane of porcine origin; collagen bioresorbable membrane of equine origin; pericardial bioresorbable membrane of equine origin. After healing period, biopsies were taken and analysed histologically. Results show that resorbable membranes placed in two layers resulted in a higher degree of bone regeneration compared to those where resorbable membranes were placed in one layer.
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