Implants sites with concomitant bone regeneration using a resorbable or non‐resorbable membrane result in stable marginal bone levels and similar profilometric outcomes over 5 years

Objectives To assess clinical and radiographic outcomes as well as the profilometric contour alterations of peri‐implant hard and soft tissues around single implants treated with simultaneous guided bone regeneration (GBR) at 5 years. Materials and Methods Twenty‐seven patients presenting with a single tooth gap in the esthetic zone received a two‐piece implant. GBR was randomly performed using a resorbable (RES) or a non‐resorbable membrane (N‐RES) combined with a bone substitute material. Follow‐up examinations were performed at baseline (BL = crown insertion), 1 year (FU‐1), 3 years (FU‐3), and at 5 years (FU‐5) including clinical and radiographic parameters as well as profilometric changes. Statistics were performed by means of parametric and nonparametric tests. Results At 5 years, 20 out of 27 patients (9 RES, 11 N‐RES) were re‐examined. Median values for probing depth changed insignificantly between BL and FU‐5 in both groups. The median marginal bone levels were located 0.23 mm (0.06; 0.46; RES) and 0.17 mm (0.13;0.28; N‐RES) below the implant shoulder at FU‐5 (changes over time p