Dimitrios Papapetros1, Vassilis Karagiannis2, Antonis Konstantinidis1, Danae A Apatzidou1. 1. Lab of Preventive Dentistry, Periodontology and Implant Biology, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, Greece. 2. School of Mathematics, Aristotle University of Thessaloniki, Thessaloniki, Greece.
Abstract
AIM: To determine tissue changes at implants placed either conventionally or in combination with a connective tissue graft (CTG). MATERIALS AND METHODS:Forty-eightpartially edentulous subjects were randomized into two treatment Groups, and 46 completed the study. Group-A (NA = 23) received crestal implant placement. In Group-B (NB = 23), a CTG harvested from the palate was stabilized over the implant neck. At the time of implant placement (T0), Groups were categorized as having thin mucosa ≤ 2.5 mm at the surgical site (NS ubgroup- AI = 12, NS ubgroup- BI = 11) or thick mucosa > 2.5 mm (NS ubgroup- AII = 11, NS ubgroup- BII = 12). Mucosa thickness, width of keratinized tissue (WKT), crestal bone levels and relative bone thickness were determined at T0 and at the two-stage surgery (T1). RESULTS: At T1, on the alveolar crest, mucosa thickness significantly decreased in the thick mucosa Subgroups (-AII/-BII, both p = 0.001), but increased at thin mucosa grafted sites (p = 0.049). No significant changes were noted in the WKT for either group. Thin mucosa grafted Subgroups (-AI/-BI) demonstrated significant decreases in crestal bone levels (both p ≤ 0.008). Crestal relative bone thickness decreased in all Subgroups (p ≤ 0.027 for significant changes). CONCLUSIONS:Connective tissue grafting resulted in smaller reductions of mucosa thickness on the alveolar crest and appeared to have the greater effects at sites with initially thin mucosa.
RCT Entities:
AIM: To determine tissue changes at implants placed either conventionally or in combination with a connective tissue graft (CTG). MATERIALS AND METHODS: Forty-eight partially edentulous subjects were randomized into two treatment Groups, and 46 completed the study. Group-A (NA = 23) received crestal implant placement. In Group-B (NB = 23), a CTG harvested from the palate was stabilized over the implant neck. At the time of implant placement (T0), Groups were categorized as having thin mucosa ≤ 2.5 mm at the surgical site (NS ubgroup- AI = 12, NS ubgroup- BI = 11) or thick mucosa > 2.5 mm (NS ubgroup- AII = 11, NS ubgroup- BII = 12). Mucosa thickness, width of keratinized tissue (WKT), crestal bone levels and relative bone thickness were determined at T0 and at the two-stage surgery (T1). RESULTS: At T1, on the alveolar crest, mucosa thickness significantly decreased in the thick mucosa Subgroups (-AII/-BII, both p = 0.001), but increased at thin mucosa grafted sites (p = 0.049). No significant changes were noted in the WKT for either group. Thin mucosa grafted Subgroups (-AI/-BI) demonstrated significant decreases in crestal bone levels (both p ≤ 0.008). Crestal relative bone thickness decreased in all Subgroups (p ≤ 0.027 for significant changes). CONCLUSIONS: Connective tissue grafting resulted in smaller reductions of mucosa thickness on the alveolar crest and appeared to have the greater effects at sites with initially thin mucosa.
Authors: Ronald E Jung; Kathrin Becker; Stefan P Bienz; Christer Dahlin; Nikos Donos; Christian Hammächer; Gerhard Iglhaut; Antonio Liñares; Alberto Ortiz-Vigón; Nerea Sanchez; Ignacio Sanz-Sánchez; Daniel S Thoma; Cristina Valles; Dietmar Weng; José Nart Journal: Clin Oral Implants Res Date: 2022-06 Impact factor: 5.021