1. Comparison of Xenogeneic Collagen Matrix vs. Free Gingival Grafts to Increase the Zone of Keratinized Mucosa Around Functioning Implants. Issue 1 (February 2019) Authors: Vellis, Jimmy; Kutkut, Ahmad; Al-Sabbagh, Mohanad Journal: Implant dentistry Issue: Volume 28:Issue 1(2019) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗