Ahmed Abdussalam M. Elgmati¹, Omar Khashaba², Hesham El-Sharkawy^{3 1} BDS, Faculty of Dentistry, Al-Fateh University, Libya. ² Professor of Oral Medicine, Periodontology, X-Ray & Diagnosis, Faculty of Dentistry, Mansoura University, Mansoura, Egypt. ³ Associate Professor of Oral Medicine, Periodontology, X-Ray & Diagnosis, Faculty of Dentistry, Mansoura University, Mansoura, Egypt. Abstract: Objectives: Evaluate the effectiveness of acellular dermal matrix allograft (ADMA) in comparison to subepithelial connective tissue graft (SCTG) in the treatment of Miller's class I and II gingival recession. Methods: A total of fourteen systemically healthy patients having Miller's Class I and II gingival recessionsaged between 22 to 42 years were selected to participate in the present study. Patients were randomly divided in two groups; test group (ADMA) and control group (SCTG). Clinical parameters including gingival index (GI), plaque index (PI), papillary bleeding index (PBI), probing depth (PD), clinical attachment level (CAL), gingival recession width (GRW),gingival recession length (GRL), width of keratinized gingiva (WKG), percentage of root coverage and patient satisfaction scores were recorded. All measurements were recorded at baseline and evaluated at 3 months postoperatively. Results: There were no statistically significant in any of the parameters between both ADMA and SCTG groups postoperatively.The root coverage obtained with SCTG group was 83.3 % at 3 months, while for ADMA group was 80.2 % at 3 months. Conclusions: ADMA may be suggested as an acceptable substitute for connective tissue graft to achieve predictable root coverage. Keywords:Gingival recession; acellular dermal matrix allograft; subpithelial connective tissue graft..