Soft‐tissue dimensional change following guided bone regeneration on peri‐implant defects using soft‐type block or particulate bone substitutes: 1‐year outcomes of a randomized controlled clinical trial

• Published in: Journal of clinical periodontology Vol. 50; no. 2; pp. 147 - 157
• Main Authors: Song, Young Woo, Bienz, Stefan P., Benic, Goran I., Cha, Jae‐Kook, Hämmerle, Christoph H. F., Jung, Ui‐Won, Jung, Ronald E.
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.02.2023
• Subjects: Alveolar Ridge Augmentation - methods; Bone biomaterials; Bone growth; Bone Regeneration; Bone Substitutes - therapeutic use; Calcium phosphates; Collagen; Computed tomography; Dehiscence; dental implant; Dental Implantation, Endosseous - methods; Dental Implants; guided bone regeneration; Guided Tissue Regeneration, Periodontal - methods; Humans; intra‐oral scan; Minerals - therapeutic use; Mucosa; randomized controlled clincial trial; Regeneration; Surgery; synthetic bone substitute; guided bone regeneration; intra-oral scan; synthetic bone substitute; randomized controlled clincial trial; dental implant
• ISSN: 0303-6979; 1600-051X; 1600-051X
• DOI: 10.1111/jcpe.13738

Aim To compare the peri‐implant soft‐tissue dimensional changes following guided bone regeneration between particulate (particle group) and collagenated soft‐block‐type (block group) biphasic calcium phosphate (BCP). Materials and Methods This study investigated 35 subjects: 18 in the particle group and 17 in the block group. Cone‐beam computed tomography obtained at 6 months post surgery and optical impressions taken periodically (before surgery, 6 months post surgery, and 1 year post surgery) were superimposed. The ridge contour changes over time and the peri‐implant mucosal thicknesses were measured diagonally and horizontally, and analysed statistically. Results The increases in diagonal (1.12 ± 0.78 mm) and horizontal (2.79 ± 1.90 mm) ridge contour of the block group were significantly higher than those in the particle group during the first 6 months (p < .05); however, the contour hardly changed thereafter (diagonal: 0.07 ± 0.75 mm; horizontal: −0.34 ± 1.26 mm), resulting in the 1‐year contour changes similar between the two groups. Regardless of the type of BCP, the ridge contour increased significantly over 1 year when the dehiscence defect had a contained configuration (p < .05). Conclusions The increase in soft‐tissue dimensions for 1 year was similar between the two groups. The mucosal contour increase was larger when the surgery was conducted in a more contained defect, and this was not influenced by the type of BCP.