Biomaterial to Counteract Ridge Reduction Following the Removal of Multiple Adjacent Teeth.

Inclusion Criteria:intact extraction sockets following removal of the natural teeth defined by: * a marginal dehiscence defect of any of the facial bone walls of 3 mm * no facial fenestration present in the apical of the marginal bone crest Exclusion Criteria: * untreated rampant caries and uncontrolled periodontal disease * uncontrolled diabetes or any other systemic or local disease or condition that would compromise post-operative healing * unable or unwilling to return for follow-up or unlikely to be able to comply with study procedures according to investigators judgement.