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- W2374311700 abstract "Objective To study the periodontal ligament (PDL) remodeling on tension side of moved-tooth through distraction osteogenesis with different distracting rate and find a suitable rate of distraction under a fixed distracting frequency. Methods The bilateral mandible of 7 male dogs were randomly divided into five groups according to the frequency of distraction : 0.2, 0.6, 1.0 mm / day group, conventional control group and blank group. In experimental groups, the distractors were activated with a rate of 0.2, 0.6 and 1.0 mm / day respectively, once a day for one week; In conventional control group, the NiTi coil spring with 150 g force was used for tooth movement. The histological change of PDL was observed with HE and Mallory's trichrome stain. Results The histological study revealed that the periodontal ligament on tension side widened significantly in 0.2 mm / day and 0.6 mm / day groups compared with conventional control group. Fibroblasts and osteoblasts enriched in PDL and new bone spicules formed actively. Periodontal ligament lesions were observed and no new bone was formed in 1.0 mm group.Conclusions Distraction osteogenesis can accelerate the remodeling of periodontal ligament on tension side compared with conventional control group. Within the physiological load bearing capacity, the periodontal ligament remodeled more actively with the increasing rate. Above the load bearing capacity, periodontal ligament remodeling stops and permanent damage can be caused." @default.
- W2374311700 created "2016-06-24" @default.
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- W2374311700 date "2008-01-01" @default.
- W2374311700 modified "2023-09-27" @default.
- W2374311700 title "A study on periodontal ligament remodeling in the tension side of moved-tooth by distraction osteogenesis with different distracting rate" @default.
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