The objective of the present study was the comparative assessment of the effectiveness of the methods for the formation of the attached keratinized gingiva based on the results of the histological investigation. The study material was a mucosal biopsy specimen taken with a mucotome at the stage of implant uncovering procedure. 4—6 mcm microtome sections were examined under a light microscope. The results yielded by different methods suggest the formation of keratinized many-layer squamous epithelium. However, the best results were obtained with the use of the collagen-based matrix. This method can be recommended as an alternative to the transplantation of the free gingival graft.