الفهرس 
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Abstract
The treatment of buccal gingival recession is a common requirement due to aesthetic concern or root sensitivity in patients with high standards of oral hygiene. The ultimate goal of a root coverage procedure is the complete coverage of the recession defect with good appearance related to adjacent soft tissues and minimal probing depth (PD) (Miller 1985, Roccuzzo et al. 2002, Clauser et al. 2003). The coronally advanced flap (CAF) procedure is a very common approach for root coverage. This procedure is based on the coronal shift of the soft tissues on the exposed root surface (Allen & Miller 1989, Pini Prato et al. 2000). This approach may be used alone or in combination with soft tissue grafts (Wennström & Zucchelli 1996), acellular dermal matrix (ADM) (Harris 1998) and platelet-rich plasma (PRP) (Marx et al. 1998).
This study evaluated the clinical changes in terms of Gingival recession depth, Probing Depth (PD), Clinical Attachment Level (CAL), Width of keratinized gingiva, Plaque Index (PI), Gingival index (GI) before and after treatment of gingival recession by using the acellular dermal matrix graft or “Alloderm”& use of growth factors by use of PRP with coronally positioned flap .
The present study was designed as a clinical trial for treatment of gingival recession defects. Fourteen subjects were selected from the outpatient clinic, Department of Oral Medicine, Periodontology and Diagnosis, Ain Shams University. With an age ranged from 20 to 45 years.
Recession defects were exposed by a trapezoidal flap. Seven patients received acellular dermal matrix (ADM) soaked in platelet-rich plasma (PRP); while the other seven patients received prp then coronal reposition for flap is done.
The results of this study revealed a highly significant reduction in the recession depth with in each group separatly, but with no significant difference between two groups. Moreover, there was a statistically significant decrease in mean Probing depth at the end of the study in both groups but there was no statistically significant difference between the two groups through all periods. Clinical attachment level (CAL). Comparison between the two groups, there showed no statistically significant differences through all periods however there was a statistically significant decrease in mean CAL between the two groups through all periods. Furthermore, results showed in Group 1, there was no statistically significant increase in mean width of keratinized gingiva through all periods and in Group 2, there was a statistically significant increase in mean width of keratinized gingiva through all periods but on Comparison between the two groups there was no statistically significant difference through all periods. Comparison between the Plaque index (PI) in the two groups revealed no statistically significant difference between the two groups through all periods and also there was no statistically significant decrease in mean PI on both groups. The gingival index showed no statistically significant decreased in mean GI through all periods.