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AimTo evaluate the non‐inferiority of the adjunct of a xenogeneic collagen matrix (CMX) or connective tissue graft (CTG) to coronally advanced flaps (CAF) for coverage of multiple adjacent recessions and compare superiority in patient‐reported outcomes (PROM).Material and methodsOne hundred and eighty‐seven subjects (92 CMX) with 485 recessions in 14 centres were randomized and followed up for 6 months. Patients filled daily diaries for 15 days to monitor patient‐reported experience. The primary outcome was changed in position of the gingival margin. Multilevel analysis used centre, subject and tooth as levels and baseline parameters as covariates.ResultsAverage baseline recession was 2.5 ± 1.0 mm. The surgery was 15.7 min shorter (95%CI from 11.9 to 19.6, p < .0001) and perceived lighter (11.9 VAS units, 95%CI from 4.6 to 19.1, p = .0014) in CMX subjects. Time to recovery was 1.8 days shorter in CMX. Six‐month root coverage was 1.7 ± 1.1 mm for CMX and 2.1 ± 1.0 mm for CTG (difference of 0.44 mm, 95%CI from 0.25 to 0.63 mm). The upper limit of the confidence interval was over the non‐inferiority margin of 0.25 mm. Odds of complete root coverage were significantly higher for CTG (OR = 4.0, 95% CI 1.8–8.8).ConclusionReplacing CTG with CMX shortens time to recovery and decreases morbidity, but the tested generation of devices is probably inferior to autologous CTG in terms of root coverage. Significant variability in PROMs was observed among centres.

The outcomes of this study show that the ImageJ analysis is a reliable, reproducible method to evaluate the percentage of root coverage after periodontal plastic surgery, when a midfacial linear measurement is used.

Objective The aim of the present study was (a) to evaluate the relationship between dental implant mucosa and dental implant papilla levels; and (b) to identify the clinical parameters associated with peri‐implant soft tissue stability over time. Materials and methods This is a retrospective study on a cohort of patients seeking a single‐tooth implant therapy in a private practice in the Paris area. Two independent examiners analyzed photographs and radiographs taken the day of definitive crown load (baseline) and the last follow‐up visit (at least 12 months later) in order to measure four peri‐implant soft and hard tissue parameters. Results Seventy‐four patients corresponding to 90 implants were analyzed. During a mean follow‐up of 53.88 months, five implants (5.6%) presented with an apical displacement of the mid‐facial marginal mucosal level of at least 1 mm. Changes in the mid‐facial mucosa level were explained by changes in (a) the keratinized tissue height over time (p < .0001); (b) changes in the papilla height (p < .0001); and (c) by the periodontal phenotype (p = .007). A significant difference between papillae that gain in height (n = 85) and papilla that lost height (n = 78) was observed concerning (a) the timing of the implant placement (p = .019); and (b) the presence of an incomplete papilla fill (distance from the top of the papilla to the contact point) at baseline (p = .004). Conclusions The present findings indicate a dependent association between dental implant mucosa and dental implant papilla levels. Stability of peri‐implant soft tissues depends on periodontal phenotype, keratinized tissue height and papilla height.