Fig. 2From: Three-dimensional changes of a porcine collagen matrix and free gingival grafts for soft tissue augmentation to increase the width of keratinized tissue around dental implants: a randomized controlled clinical studySurgical procedure in the CM group: a preoperative intraoral view indicating a lack of keratinized tissue at implants 35 and 37. b Postoperative view showing the fixation of CM at the recipient site. c Intraoral view of the surgical site after 6 monthsBack to article page