Thick vs. Thin Acellular Dermal Matrix (ADM)

Inclusion Criteria: A. At least one Miller Class I or II mucogingival defect ≥ 3 mm (Miller 1985). B. The mucogingival defect must be on a non-molar tooth. C. Patients must be ≥ 18 years of age. Exclusion Criteria: A. Patients with debilitating systemic or diseases that significantly affect the periodontium. B. Patients with a known allergy to any of the materials that will be used in the study, including systemic antibiotics (tetracycline and doxycycline). C. Patients requiring antibiotic prophylaxis. D. Root surface restorations at the site of recession. E. No detectable CEJ F. Patients who fail to maintain acceptable oral hygiene levels at the test and adjacent teeth. G. Patients who are pregnant or lactating. H. Patients who use tobacco products (smoking or smokeless tobacco). I. Patients with alcohol abuse problems. J. Patients undergoing long-term steroid therapy. K. History of previous root coverage procedures, graft or GTR, on the test teeth. L. Patients who fail to complete the informed consent form.