Premium
Randomized controlled clinical study assessing two membranes for guided bone regeneration of peri‐implant bone defects: 3‐year results
Author(s) -
Basler Tobias,
Naenni Nadja,
Schneider David,
Hämmerle Christoph H. F.,
Jung Ronald E.,
Thoma Daniel S.
Publication year - 2018
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/clr.13147
Subject(s) - dentistry , medicine , implant , resonance frequency analysis , buccal administration , peri , radiography , dental implant , nuclear medicine , surgery
Objectives To assess two‐ and three‐dimensional changes of the peri‐implant tissues as well as clinical, biological, and radiological outcomes of implants having been treated with resorbable or nonresorbable membranes at 3 years. Materials and methods Twenty‐three patients were re‐examined after having received a single‐tooth implant in the esthetic zone in conjunction with guided bone regeneration ( GBR ) using either a resorbable ( RES ) or a titanium‐reinforced nonresorbable membrane (N‐ RES ) and demineralized bovine bone mineral. Volumetric and linear as well as clinical and radiographic measurements were performed at crown insertion (baseline), at 1 year ( FU ‐1) and 3 years ( FU ‐3). Statistics were performed by means of parametric and nonparametric tests. Results Minor, but ongoing buccal volume loss was observed in both groups during the 3‐year follow‐up. A slightly higher volume loss was observed in group RES (−0.22 mm) compared to N‐ RES (−0.14 mm) at 1 year ( FU ‐1), but aligned at 3 years ( FU ‐3) RES (−0.30 mm) N‐ RES (−0.32 mm). All changes over time were statistically significantly different within ( p < .05), but not between the groups ( p > .05). Stable median interproximal bone levels after 3 years ( FU ‐3); 0.26 mm (0.04; 0.36) ( RES ) and 0.14 mm (0.08; 0.20) (N‐ RES ) and healthy tissues ( BOP , PD ) were obtained with both membranes. Conclusions Both treatment modalities resulted in minor, but ongoing contour changes of the peri‐implant tissues. Stable interproximal bone levels and healthy tissues can be obtained with membranes up to 3 years.