Journal of clinical periodontology | 2021
Clinical evaluation of xenogeneic collagen matrix versus free gingival grafts for keratinized mucosa augmentation around dental implants: a randomized controlled clinical trial.
Abstract
AIM\nTo evaluate the outcomes of an apically repositioned flap (ARF) plus xenogeneic collagen matrix (XCM) in augmenting keratinized mucosa width (KMW) around dental implants when compared with ARF plus free gingival grafts (FGG).\n\n\nMATERIAL AND METHODS\nTwenty-six participants with at least one site with KMW ≤2\u2009mm were randomized into FGG or XCM group. Clinical examinations were performed at baseline, 2 and 6\u2009months after surgery, including KMW, keratinized mucosa thickness (KMT), gingival index (GI) and probing depth (PD). Postoperative pain and patient satisfaction were also evaluated.\n\n\nRESULTS\nAt 6\u2009months, FGG attained a greater increase of KMW and thicker mucosa than XCM (4.1\u2009±\u20091.6\u2009mm vs. 1.8\u2009±\u20091.0\u2009mm, p\u2009<\u20090.001; 1.7\u2009±\u20090.6\u2009mm vs. 1.2\u2009±\u20090.3\u2009mm, p\u2009<\u20090.01). Regarding GI, PD, postoperative pain, aesthetic outcomes and patient satisfaction, no significant difference could be detected. Moreover, the operation time of XCM group was shorter (60\u2009±\u20099\u2009minutes vs. 39\u2009±\u20098\u2009minutes, p\u2009<\u20090.001).\n\n\nCONCLUSIONS\nFGG could result in greater increase of KMW than XCM, though both could increase KMW, maintain peri-implant health and attain comparable aesthetic outcomes. The use of XCM was associated with reduced operation time.