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.

The bone defect and alveolar cavity were augmented with Spongostan® dental 1x1x1cm, Johnson & Johnson, Spreitenbach, Switzerland. The extraction sites were covered on one side with an INION GTRTM Biodegradable Membrane System and on the other with Geistlich resorbable bilayer Bio-Gide®-membrane.

This study was conducted in adaptation to the ISO 10993 Standard : Biological Evaluation of Medical Devices, Part 6 (2007): Tests for Local Effects after Implantation.

This study was conducted in accordance with the requirements of the FDA (Department of health and human services) Good Laboratory Practice (GLP) Regulations, 21 CFR 58 (revised as of April 01, 2005) and in accordance with the requirements of the OECD Good Laboratory Practices, reference ENV/MC/CHEM (98) 17, adapted by council on November 26th 1997.

• Trial with medical device

Inclusion criteria: Females or males between the age of 18 to 30 Subject for extraction of both lower fully impacted wisdom teeth Signed informed consent Able and willing to comply with all study procedures

Exclusion criteria: Heavy smoker (>20/day) Insulin dependant diabetes Pregnant or nursing