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KMID : 0354619940060010081
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Journal Dankook Dental Research Institute
1994 Volume.6 No. 1 p.81 ~ p.90
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THE EFFECTS OF DIFFERENT ROOT TREATMENT ON CONNECTIVE TISSUE REGENERATION TO PERIODONTALLY DISEASED ROOTS
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Abstract
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Recent reserach has focused on development of proditable procedures aimed at obtaining new connective tissue attachment to previously diseased root surfaces. Citric acid & tetracycline HCl treatment ef exposed root stufaces have been shown to demineralize dentia and thus domineralization of the root surface resulted in greater all attachment. The pupose of this study is to compare the effects of tetracycline HCl and citric acid root treatments on the aspect of apical migration of epithelial cell, the degree of attachment of connective tissue, the new cementum formation & the degree of new alveolar bone formation around the grafted materials. When additionally the root surface is treated with citric acid or tetracycline & the Hydroxyapatite is graft during the flap operation surgical alveolar defect was formed in lower right & left premolar area of adult dog Experimental chronic periodontitis is induced by ligation the surgical alveolar defect with orthodontic wirt. The control group is only performed flap
oeration while additional use of tetracycline or citric acid on m surface in the experimental group. Thereafter the experimental animals were sacrificed at 1,2,4,8 weeks. After the histologic assessment was perfomed, the following results were acquired.
1. The control group is similar to experimental group by the first week but thereafter apical migration of epithelium were seen and new bone formation were not distinct.
2. The new cementum formation & fibrous connective tissue attachment on the root surface were seen in citric - acid group & tetracyclin group and apical migration of epithelium was very delayed. There was no dish difference between the two experimental groups.
3. In both group, new bone formation surrounding the graft material was observed but the rate of new bone formation of tetracycline group was superior to the citfc acid group.
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KEYWORD
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