The procedures of augmenting soft tissues are usually carried out to increase the width of the keratinized gingiva, the width of the gingival tissue, as well as to cover recessions. In addition, these procedures are undertaken if a patient feels discomfort while brushing and/or chewing due to the proximity of the alveolar mucosa; if during the planning period of orthodontic tooth movement it can be expected that the final position will be related to the dehiscence of alveolar bone, and if in the area of the thin marginal tissue there are subgingival restorations. Controversies arise in the sense of the necessity of a certain amount of keratinized gingiva around teeth to maintain healthy periodontium. A recent consensus of opinion is that the height and width of the gingiva are not required to preserve a healthy periodontium if oral hygiene is good. Since it is not always possible to obtain an environment without a dental plaque in a clinical situation, a sufficient amount of keratinized gingiva may be needed to overcome a patient’s bad oral hygiene. Recent studies have shown that an inadequate height and width of peri-implant keratinized gingiva may lead to a greater accumulation of dental plaque, mucosal inflammation, greater risk of losing the peri-implant alveolar bone, dehiscence of the soft tissue, and tissue attachment loss. The most common method used to augment the volume of the soft tissue is free connective tissue graft (CTG). CTG is considered the gold standard and achieves clinically anticipated results. However, the inclusion of the intraoral donor site can cause discomfort to the patient due to several treatment areas and a relatively longer procedure. In order to reduce patient morbidity and due to the other treatment sites, xenogeneic collagen matrices (XCM) have been developed. Due to their biocompatibility, satisfactory tissue integration, unlimited quantity and good clinical outcomes, XCM can be used as an adequate alternative to CTG for soft tissue volume augmentation. Keywords: