Preoperative inflammatory markers will be assessed at the preoperative examination and two days after surgery by dipping paper points into the crevicular fluid. Furthermore the investigators will assess whether remnants of Emdogain are still traceable two days after surgery. Wound healing after root coverage procedure is assessed using the "early wound healing index (EHI)" defined by Wachtel et al. According to Wachtel et al., wound healing is quantified and graded into 5 stages.