Study of Root Coverage With Acellular Dermal Matrix: Puros® Dermis Versus Alloderm®

Inclusion Criteria: * Male or female, of any ethnicity, between 18 and 99 years of age. * No known allergies to study material. * Able to communicate with the investigator and read, understand, and sign the informed consent form. * Maxillary incisor, canine, or premolar with at least one Miller's Class I or II gingival recession defects that are not adjacent to one another. * Depth of the gingival recession defects of 2mm or greater. * No gingival surgery within the past 12 months at the defect site. No prior antibiotic use within 3 months with less than 2 weeks durations. * Ability to maintain good oral hygiene. Exclusion Criteria: * Patients taking any medications known to cause gingival enlargement. * Patients with unstable systemic diseases. * Patients with compromised immune systems or unstable bleeding disorders. * Patients with active infectious diseases (e.g. hepatitis, tuberculosis, HIV, etc.). * Patients with a mental disability that may hinder participation in the study (e.g. inability to follow through with oral hygiene instructions, postoperative instructions, follow-up commitments, etc.). * Patients taking steroid medications. * Tobacco use or smoking within 1 year of screening visit (e.g. cigarettes, pipes, cigars, chew). * Pregnant females or females attempting to get pregnant. * Other conditions the investigator feels would inhibit from a good candidate for the study.