Document Classification

Section Type: RESULTS

Text: Guided tissue regeneration with collagen (COLL) and collagen + DFDBA (COBA) both resulted in statistically significant (P < 0. 05) reductions in recession depth (2. 1 + / - 0. 9 mm and 2. 5 + / - 0. 5 mm), recession width (1. 5 + / - 1. 7 mm and 2. 2 + / - 1. 6 mm), increase in keratinized tissue (0. 7 + / - 0. 8 mm and 1. 2 + / - 1. 0 mm), and gain of clinical attachment level (2. 1 + / - 1. 0 mm and 3. 0 + / - 1. 0 mm), when comparing 6-month data to baseline.