Journal
INTERNATIONAL JOURNAL OF PERIODONTICS & RESTORATIVE DENTISTRY
Volume 42, Issue 4, Pages 515-522Publisher
QUINTESSENCE PUBLISHING CO INC
DOI: 10.11607/prd.5840
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- Geistlich Pharma (Wolhusen, Switzerland)
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The objective of this study was to assess the changes in buccal mucosal thickness at implant sites following soft tissue augmentation with a volume-stable collagen matrix (VCMX). The results showed minimal changes in soft tissue thickness at 1 mm and 3 mm apical to the mucosal margin. Additionally, soft tissue augmentation increased the ridge profile, but there was a decrease in ridge contour during the healing process.
The objective of this study was to assess volumetric and linear changes of buccal mucosal thickness at implant sites following soft tissue augmentation with a volume-stable collagen matrix (VCMX). Soft tissue augmentation using a VCMX was performed in 12 patients at the time of implant placement. Hydrocolloid impressions were taken prior to surgery and at 1 and 6 months postsurgery. Stone cast models were scanned, and stereolithography (STL) files from the three time points were uploaded to an image-analysis software. At all time points, linear and volumetric measurements of the contour changes up to 3 mm apical to the mucosal margin were performed and were analyzed statistically. At 1 mm apical to the mucosal margin, the change in soft tissue thickness between presurgery (T1) and 1 month (T2) amounted to 0.21 +/- 1.22 mm, and the change between T1 and 6 months (T3) was 0.08 +/- 1.47 mm. At 3 mm apical to the mucosal margin, the change in soft tissue thickness was 1.92 +/- 1.70 mm between T1 and T2 and 0.31 +/- 1.26 mm between T1 and T3. Contour (volumetric) changes revealed an increase of 0.58 +/- 0.73 mm between T1 and T2 and an overall gain of 0.55 +/- 0.73 mm between T1 and T3. Soft tissue augmentation with VCMX increased the ridge profile. The increase in ridge width was greater at 3 mm below the ridge crest than at 1 mm below the ridge crest. Remodeling processes during healing showed a decrease in the ridge contour between 1 and 6 months.
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