根面の滑沢化および不良肉芽組織除去がＧＴＲ法による歯周組織再生に及ぼす効果に関する組織学的研究

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  • Histological Study of Effects of Root Planing and Removal of Inflammatory Granulation Tissues on Periodontal Tissue Regeneration by GTR.

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The aim of this study was to evaluate effects of root planing and removal of inflammatory granulation tissue on periodontal tissue on guided tissue regenaration (GTR) using expanded polytetrafluoroethylene (ePTFE) membrane (Gore-Tex® periodontal material). The gingival flaps were elevated and the buccal bone was reduced to approximately 5 mm from alveolar crest on five mongrel adult dogs. The experimental region was divided into four groups and treated by the root planing and/or the removal of inflammatory granulation tissue. A notch was marked at the level of the crest of the remaining alveolar bone. After the root surfaces of the defects were conditioned with 10% Acromycin, the membranes were placed. The gingival flaps were repositioned and sutured. After 4 weeks, the membranes were removed. At the 24 weeks after surgery, the dogs were sacrificed. The results indicated that the amount of periodontal tissue regeneration in the group of only root planing was more than that in the group of only removal of inflammatory granulation tissue. And no significant difference of the amount of periodontal tissue regeneration was observed between group of both the root planing and the removal of inflammatory granulation tissue and group of only root planing. These results suggested that root planing than removal of inflammatory granulation tissue were more important for periodontal tissue regeneration on GTR. J. Jpn. Soc. Periodontol., 41: 409-416, 1999.

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