الفهرس Only 14 pages are availabe for public view
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Abstract
Background: In horizontal ridge augmentation procedures the clinicians should achieve a passive flap closure through flap release techniques {u2013}mostly periosteal releasing incisions. However, coronal advancement of the tissues might place the thin, non-keratinized tissues at or near the crest of the ridge that later on might have a deleterious effect on the esthetics and function of the implant-based prosthesis. Objectives: To test the efficacy of the xenogeneic collagen matrix in increasing the thickness of the peri-implant soft tissue and widening the zone of keratinized tissue, when used in conjunction with crest-split technique and simultaneous implant placement. Materials and methods: This study involved 20 candidates for horizontal ridge augmentation with split-crest technique and simultaneous implant placement in the anterior maxilla. The participants were randomized and allocated to 2 equal groups. group (A) was the test group, and its members received the xenogeneic collagen matrix in addition to the augmentation procedure, while group (B) was the control group and its members received only the augmentation procedure. The primary outcome was the soft tissue thickness measured by an endodontic file and ruler at baseline, 3 and 6-months post-operatively. The secondary outcome was the width of keratinized tissue measured by a periodontal probe at baseline, 2, 3 and 6-months post-operatively