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- W2386618400 abstract "Objective:To evaluate the effects of bone density and bone structure of extraction sites on tooth movement and the histological change when tooth moving into extraction sites in different time,selecting optimal time of tooth movement into extraction sites clinically. Method: Extraction of upper first molars were performed on 30 male Sprague-Dawley rats divided equally into 3 groups. Orthodontic appliance were placed at different time after tooth extraction in order to mesially move the maxillary second molars into the extraction spaces. Undecalcified mesio-distal specimens and decalcified specimens were prepared. The samples were assessed with histology and histomorphometry. The quantification of bone density and bone structure in extraction sites at different time were performed by computer image analysis ?Result: The bone density and bone structure would getting denser and denser with long intervals before tooth moving into extraction sites which could delay the tooth movement. But tooth movement into extraction sites immediately after tooth extraction could do more harm to apical periodontal tissues and bring more root resorption. Conclusion: (1) Orthodontic retraction into extraction sites should be initiated at an early stage after tooth extraction.(2)The optimal time of tooth movement into extraction sites clinically was about a week after tooth extraction." @default.
- W2386618400 created "2016-06-24" @default.
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- W2386618400 date "2004-01-01" @default.
- W2386618400 modified "2023-09-27" @default.
- W2386618400 title "Histomorphometric and histologic study on tooth movement into extraction sites" @default.
- W2386618400 hasPublicationYear "2004" @default.
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