The present prospective study will include a total of 40 patients, 20 patients in each of the 2 groups (Emdogain group and control group). All procedures will be elective procedures. After oral and written informed consent, the study will comprise the collection of crevicular fluid sampling and clinical data as well as the filling of a patient questionnaire. The study will be conducted as randomized prospective study. In the treatment group the procedure will be performed with Emdogain, in the control group, root coverage will be performed without, respectively. All procedures will be performed by one experienced operator. Patients will all be treated with the standard surgical procedure of the University of Bern. In the patient group with Emdogain, tissue graft and explantation site will be covered with Emdogain, in the patient group without Emdogain, no Emdogain will be used. After inclusion of the patients, the study duration will last 6 months for each patient.