Elise G Zuiderveld1, Henny J A Meijer1,2, Arjan Vissink1, Gerry M Raghoebar1. 1. Department of Oral and Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands. 2. Department of Implant Dentistry, Dental School, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
Abstract
BACKGROUND: Soft-tissue grafting to thicken the soft tissue around dental implants was proposed to ameliorate the esthetic outcome. Traditionally, connective tissue is used as a grafting material, but a xenogeneic collagen matrix was introduced as an alternative to reduce patient morbidity. METHODS: A total of 60 patients randomly received eitherno graft (n = 20, NG group), a connective tissue graft (n = 20, CTG group), or a xenogeneic collagen matrix (n = 20, XCM group) when an implant was placed in a preserved alveolar ridge. Changes in mid-buccal mucosal level (MBML) at 1 (T1 ) and 12 (T12 ) months after final implant crown placement were compared to the pre-extraction level. Additionally, esthetics, marginal bone level, clinical peri-implant parameters, and patient satisfaction were assessed. RESULTS: At T12 , mean changes in MBML were -0.48 ± 1.5 mm, -0.04 ± 1.1 mm, and -0.17 ± 1.3 mm in the NG, CTG, and XCM groups (P = 0.56), respectively. Regarding the other outcome variables, no significant intergroup differences were observed. CONCLUSIONS:Soft-tissue grafting at single implant placement in preserved alveolar ridges does not result in a better esthetic outcome or in better peri-implant health and should not be considered as a standard procedure.
RCT Entities:
BACKGROUND: Soft-tissue grafting to thicken the soft tissue around dental implants was proposed to ameliorate the esthetic outcome. Traditionally, connective tissue is used as a grafting material, but a xenogeneic collagen matrix was introduced as an alternative to reduce patient morbidity. METHODS: A total of 60 patients randomly received either no graft (n = 20, NG group), a connective tissue graft (n = 20, CTG group), or a xenogeneic collagen matrix (n = 20, XCM group) when an implant was placed in a preserved alveolar ridge. Changes in mid-buccal mucosal level (MBML) at 1 (T1 ) and 12 (T12 ) months after final implant crown placement were compared to the pre-extraction level. Additionally, esthetics, marginal bone level, clinical peri-implant parameters, and patient satisfaction were assessed. RESULTS: At T12 , mean changes in MBML were -0.48 ± 1.5 mm, -0.04 ± 1.1 mm, and -0.17 ± 1.3 mm in the NG, CTG, and XCM groups (P = 0.56), respectively. Regarding the other outcome variables, no significant intergroup differences were observed. CONCLUSIONS: Soft-tissue grafting at single implant placement in preserved alveolar ridges does not result in a better esthetic outcome or in better peri-implant health and should not be considered as a standard procedure.
Authors: Stefan P Bienz; Miha Pirc; Spyridon N Papageorgiou; Ronald E Jung; Daniel S Thoma Journal: Clin Oral Implants Res Date: 2022-06 Impact factor: 5.021