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Journal of clinical periodontology v.44 no.2, 2017년, pp.185 - 194   SCI SCIE
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Soft tissue volume augmentation at dental implant sites using a volume stable three‐dimensional collagen matrix – histological outcomes of a preclinical study

Thoma, Daniel S. (Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center of Dental Medicine, University of Zurich, Zurich, Switzerland ) ; Naenni, Nadja (Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center of Dental Medicine, University of Zurich, Zurich, Switzerland ) ; Benic, Goran I. (Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center of Dental Medicine, University of Zurich, Zurich, Switzerland ) ; Hämmerle, Christoph H. F. (Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center of Dental Medicine, University of Zurich, Zurich, Switzerland ) ; Jung, Ronald E. (Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center of Dental Medicine, University of Zurich, Zurich, Switzerland ) ;
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    Abstract Aim The aim of this study was to test whether or not soft tissue augmentation with a collagen matrix (VCMX) leads to a similar increase in ridge width around dental implants compared to the use of an autogenous subepithelial connective tissue graft (SCTG). Materials and Methods In 12 dogs, immediate dental implants were placed with simultaneous guided bone regeneration. Three months later, soft tissue volume augmentation was performed by randomly allocating three treatment modalities to these sites [VCMX, SCTG, sham‐operated group (control)]. Dogs were sacrificed at 1 ( n = 4), 2 ( n = 4) or 6 months ( n = 4). Descriptive histology and histomorphometric measurements for soft tissue thickness were performed on non‐decalcified sections. Results The horizontal soft tissue thickness was maximal at the most coronal level (alveolar crest) at 1 month (VCMX: 2.1 ± 1.6 mm; SCTG: 2.5 ± 1.7 mm; p = 0.877) and decreased until 6 months. At 6 months, the greatest mucosal thickness was at a level 3.5 mm below the crest (VCMX: 0.8 ± 0.3 mm; SCTG: 0.7 ± 0.2 mm) ( p = 0.754). Control sites revealed no relevant soft tissue augmentation at any level and any time‐point. Tissue integration for VCMX and SCTG were favourable with minimal inflammatory reactions. Conclusions Soft tissue volume augmentation at implant sites was obtained to a similar extent using VCMX and SCTG up to 2 months. Thereafter, degradation and remodelling processes were enhanced leading to a minimal increase in soft tissue thickness at 6 months for VCMX and SCTG.


  • 주제어

    collagen‐based matrix .   dental implants .   guided bone regeneration .   soft tissue augmentation .   soft tissue volume .   subepithelial connective tissue graft.  

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