The aim of the study was to evaluate whether the use of a xenograft is not inferior to the use of xenograft and autogenous bone chips in treating dehiscences at implant placement. Materials and Methods: After implant placement, leaving a dehiscence, control sites were treated using a composite graft (autogenous bone chips and xenograft) and at the test sites 100% xenograft was used. Both sites were covered with a resorbable collagen membrane. Dehiscences were measured clinically at implant placement and at re-entry. CBCT was taken immediately after implant placement and after 4 months. Results: In total, 28 GBR procedures were performed in 14 patients. On average, the change in vertical defect height was 2.07 mm (46.7%-test group) and 2.28 mm (50.9%-control group) (p > .05). The horizontal defect width at the implant shoulder change on average 1.85 mm (40.5%-test group) and 1.75 mm (40.9%-control group) (p > .05). On average, a loss in augmentation thickness of 0.45 mm (68.9%-test group) and 0.64 mm (55.5% control group) between implant placement and augmentation and abutment surgery was obtained at the implant shoulder. Conclusion: Both treatment modalities seem to work to a certain extent. At implant shoulder level, the augmentation thickness seems to be disappeared after the healing phase. (NCT03946020).

Background : Although the results of Type 2 placement with simultaneous contour augmentation are very beneficial, there still is debate about the need to combine autogenous bone chips with a graft material. Whereas the addition of autologous bone chips might increase the bone formation, the resorption of a xenograft is slightly inferior compared to the combination of a xenograft and autologous bone.Aim/Hypothesis : The aim of the present study was to clinically and radiologically evaluate whether the use of a xenograft is not inferior to the use of a xenograft combined with autogenous bone chips for the treatment of bony dehiscences at implant placement.

Aim: To assess, in vitro, variables potentially influencing implant blooming using a human-like imaging phantom and 3D-printed mandibles.Material and Methods: Sixty implants were inserted in 3D-printed mandibles in 26 different configurations in order to examine the impact of implant diameter, presence of a cover screw, implant design/material, implant position, and the presence of additional implants on implant blooming using two cone-beam computed tomography (CBCT) devices (Accuitomo [ACC] and NewTom [NWT]). Two observers measured the amount of implant blooming in both buccolingual and mesiodistal directions.Inter-rater agreement and descriptive statistics, grouped by implant characteristic and CBCT device, were calculated. Results:Both CBCT devices increased implant diameter (a mean increase of 9.2% and 11.8% for titanium, 20.3% and 24.4% for zirconium, for ACC and NWT, respectively).An increase in implant diameter did not increase the amount of blooming, whereas placing a cover screw did (from 8.0% to 10.9% for ACC, and from 10.0% to 15.6% for NWT). Moreover, implant design, anatomical region, and the presence of another implant also affected the extent of the blooming.Conclusions: Dental implants show a clear diameter increase on CBCT, with the effect being more pronounced for zirconium than for titanium implants. Similar effects are likely to occur in the clinical setting, potentially masking nonosseointegration, reducing the dimensions of peri-implant defects, and/or causing underestimation of the buccal bone thickness.

BackgroundThe importance of an adequate amount of peri‐implant keratinized tissue (KT) and attached mucosa has recently been emphasized. This manuscript presents preliminary findings of a novel approach for increasing the width of keratinized mucosa (KM) around dental implants using a mesh free gingival graft (mesh‐FGG).MethodsTwo healthy adults were treated as part of this study. After implant placement, a large edentulous alveolar ridge with shallow vestibule and minimal amount of KM was treated in both subjects (1 in the posterior mandible, and 1 in the anterior mandible) with the combination of an apically positioned flap (APF) and a mesh‐FGG. Clinical, esthetic and patient‐reported outcomes were observed at approximately 4‐month time points.ResultsAll sites healed uneventfully after the treatments. In both cases, increased vestibule depth, soft‐tissue thickness and width of peri‐implant KM were obtained. The patients did not report any accessory discomfort. 4 months following the grafting procedure, good overall esthetic outcome was observed with minimal color disparity and graft demarcation.ConclusionsWidth of KM around dental implants can be increased using a mesh‐FGG. Randomized controlled clinical studies comparing mesh‐FGG to conventional FGG and other commonly applied techniques are required to assess the long‐term efficacy of this novel technique in terms of soft‐tissue thickness, width of peri‐implant KM and patient‐reported outcomes.This article is protected by copyright. All rights reserved