24 March 2018
Int J Med Sci 2015; 12(7):544-551. doi:10.7150/ijms.12217
Cytological Kinetics of Periodontal Ligament in an Experimental Occlusal Trauma Model
1. Department of Oral Health Promotion, Matsumoto Dental University Graduate School of Oral Medicine, Shiojiri, Japan
Using a model of experimental occlusal trauma in mice, we investigated cytological kinetics of periodontal ligament by means of histopathological, immunohistochemical, and photographical analysis methods. Periodontal ligament cells at furcation areas of molar teeth in the experimental group on day 4 showed a proliferation tendency of periodontal ligament cells. The cells with a round-shaped nucleus deeply stained the hematoxylin and increased within the day 4 specimens. Ki67 positive nuclei showed a prominent increase in the group on days 4 and 7. Green Fluorescent Protein (GFP) positivity also revealed cell movement but was slightly slow compared to Ki67. It indicated that restoration of mechanism seemed conspicuous by osteoclasts and macrophages from bone-marrow-derived cells for the periodontal ligament at the furcation area. It was suggested that the remodeling of periodontal ligament with cell acceleration was evoked from the experiment for the group on day 4 and after day 7. Periodontal ligament at the furcation area of the molar teeth in this experimental model recovered using the cells in situ and the bone-marrow-derived cells.
Keywords: Occlusal trauma, Periodontal tissue, Green fluorescent protein (GFP), Ki67, Mouse
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How to cite this article:
Takaya T, Mimura H, Matsuda S, Nakano K, Tsujigiwa H, Tomida M, Okafuji N, Fujii T, Kawakami T. Cytological Kinetics of Periodontal Ligament in an Experimental Occlusal Trauma Model. Int J Med Sci 2015; 12(7):544-551. doi:10.7150/ijms.12217. Available from http://www.medsci.org/v12p0544.htm