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KMID : 0362320000250030338
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Journal of Korean Academy of Operative Dentistry
2000 Volume.25 No. 3 p.338 ~ p.358
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THE EFFECT OF TWO KINDS OF PERIODONTAL LIGAMENT MANAGEMENT UPON PERIODONTAL HEALING AND ROOT RESORPTION AFTER REPLANTATION IN RATS
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Kwon So-Ran
Kum Kee-Yeon
Lee Seung-Jong
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Abstract
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The effect of bench drying or removal of the periodontal ligament with NaOCl upon periodontal healing and root resorption after replantation of molars was studied in rats. A total of 40 Sprague-Dawley female rats were used and fed a powdered purina rat chow diet containing 0.4% beta-aminoproprionitrile. The maxillary first molars were extracted and the periodontal ligaments were removed either by bench drying for 15 minutes or by immersion in 2.5% NaOCl solution. The rats were sacrificed at 5, 10, and 21 days by heart infusion. In order to observe the effect of 0.5% stannous fluoride, 10 ?4 M 10?4M , 10 ?2 M 10?2M , and 1M etidronate disodium on the early stage of periodontal healing, the periodontal ligament was removed with 2.5% NaOCl followed by immersion of the molar in the respective solutions for 5 minutes. The rats were sacrificed after 10 days and the following results were obtained. 1. The removal of the periodontal ligament with 2.5% NaOCl seemed to be more effective than bench drying, since the resorption area in the NaOCl treated group showed a gradual increase whereas a decline in resorption area from 5 days to 21 days was observed in the bench dried group. 2. The application of 0.5% stannous fluoride seemed to enhance the periodontal ligament attachment and active migration of fibroblasts could be observed. 3. The application of 10 ?4 M 10?4M , 10 ?2 M 10?2M , and 1M etidronate disodium led to a good periodontal ligament attachment. No evident areas of root resorption were found. 4. The use of β β -APN made it possible to extract the maxillary first molar with all five roots intact.
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KEYWORD
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Periodontal ligament management, Periodontal healing, Root resorption, Beta-aminoproprionitrile, Stannous fluoride, Etidronate disodium
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