The purpose of this study was to evaluate by histology and histomorphometry, thirty human osseous biopsies sampled from fifteen patients (2 biopsies per patient) following 3 months of implantation. This study is part of a splitting-blind clinical investigation to compare the performance and safety of INION GTRTM Biodegradable Membrane System to resorbable bilayer Bio-Gide®-membrane of Geistlich biomaterials in enhancing bone regeneration after removal of wisdom teeth.