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  • Title: Clinical evaluation of acellular allograft dermis for the treatment of human gingival recession.
    Author: Aichelmann-Reidy ME, Yukna RA, Evans GH, Nasr HF, Mayer ET.
    Journal: J Periodontol; 2001 Aug; 72(8):998-1005. PubMed ID: 11525450.
    Abstract:
    BACKGROUND: Periodontal root coverage procedures to treat recession areas are indicated for unesthetic, exposed, and/or painful root surfaces. Many methods, most using autogenous soft tissue grafts, have been utilized, but with associated morbidity at the donor sites. An alternative donor material would reduce the morbidity and provide for sufficient available donor tissue. METHODS: An acellular allogeneic dermal connective tissue matrix (AD) and autogenous palatal connective tissue (CT) were compared as subepithelial grafts for the treatment of gingival recession. Twenty-two patients with similar isolated gingival recession of > or = 2 mm on 2 separate teeth were treated with the subepithelial graft technique. Exposed roots were hand root planed only and, by random allocation, either a fitted AD or fitted CT graft was secured in place and covered by coronally positioned flaps. RESULTS: Mann Whitney U test analysis found the following changes at 6 months for AD and CT, respectively, compared to presurgical conditions: root coverage of 1.7 +/- 1.2 (65.9%) and 2.2 +/- 1.1 mm (74.1%) (both P<0.01), increase in keratinized tissue (KT) of 1.2 +/- 1.3 and 1.6 +/- 1.9 (both P<0.01), and an increase in gingival thickness with both; 83.2% of expected root coverage was obtained with AD and 88.6% with CT (P= 0.43). There were no significant differences between treatments for any parameter. Global assessments by clinicians and patients suggested a more esthetic clinical result with AD. CONCLUSIONS: These results suggest that acellular allogeneic dermal matrix may be a useful substitute for autogenous connective tissue grafts in root coverage procedures.
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