Abstract
The aim of this study was to investigate histologically the amount of peri-implant tissue augmentation after volume-stable porcine collagen matrix transplantation. Six male beagle dogs were used in the experiment. P2, P4, and M1 distal roots were extracted under general anesthesia. After 6 months, implants were placed in the same sites, and volume-stable porcine collagen matrix transplantation was performed. Impressions were taken at 1 and 2 weeks and at 1, 2, and 3 months after transplantation. The dogs were euthanized at 3 months, and their mandibles were removed and scanned using micro-computed tomography. Standard Triangulated Language data were also obtained. Using preoperative models as a reference, the data for all time points were compared, and changes in the thickness of the cross-section of the implant sites were measured. The model created at 3 months was then compared with the mandible data, and the thickness of collected peri-implant soft tissue was measured under optical microscopy. Increased thickness was found at some of the sites on the buccal side. Regarding the peri-implant soft tissue, the thickness of the measured sites on the buccal side was significantly increased at 3 months in the experimental group. Histological observations of the internal structures of the tissue in the experimental group revealed irregular collagen fibers and a remnant collagen matrix. Endogenous tissue was observed within the collagen matrix, indicating good fusion with the surrounding autologous tissue. These results suggest that volume-stable porcine collagen matrix transplantation promotes peri-implant tissue augmentation on the buccal side.
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Acknowledgements
The authors would like to express their heartfelt thanks to Professor Mikio Ishiyama of the Second Department of Anatomy, Nippon Dental University School of Life Dentistry at Niigata, for his guidance and cooperation in regard to this study. The authors would also like to thank Shofu, Inc. (Kyoto, Japan) for providing the specimens.
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Sasagawa, A., Igarashi, K., Ueda, K. et al. Peri-implant tissue augmentation by volume-stable collagen matrix transplantation: a study of dog mandibles. Odontology 110, 81–91 (2022). https://doi.org/10.1007/s10266-021-00639-8
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DOI: https://doi.org/10.1007/s10266-021-00639-8