Straumann® Emdogain® is a unique gel containing enamel matrix derivative. This mixture of natural proteins can induce biological pro­cesses that usually take place during the development of the peri­odontium and may stimulate certain cells involved in the healing process of soft and hard tissues. Straumann® PrefGel is a neutral EDTA formulation intended for topical application onto exposed root surfaces during periodontal surgery in order to remove the smear-layer.