両側下顎第一大臼歯のエナメル突起による根分岐部病変の治療経過

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  • Curing Furcation Involvement Caused by Bilateral Enamel Projections.

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Sickly change around root divergence is determined to be a morbid state where tooth-surrounding tissues of a compound root tooth have been destroyed. A compound root tooth has a rather complicated shape when compared to a single root tooth, and it is therfore difficult to treat surrounding teeth.<BR>Causes of root divergent morbid changes are considered to be pocket formations due to the progress of chronic marginal periodontitis, abnormal states of a tooth crown such as enamel promontories, floor of pulp chamber, and lateral branch caused by pulpitis, and incomplete treatment of inside teeth. Injuries due to tooth occlusion are also considered to be a secondary cause of these morbid changes, with it is believed, occur due to a single or complex combination of the above factors.<BR>Enamel promontories, regarded as one cause of morbid change around root divergence, arrest compound tissue attachment, friggring plaque accumulation. This leads to attachment loss, followed by periodontitis. Because of this Master and Hoskins divided the cause of enamel promontories into 3 stages.<BR>Because root morbid divergent changes have many different causes, Grickman suggested that this stage should be divided into 4 stages while Lindhe & Nyman suggested division into 3 stages.<BR>Initial treatment was conducted against morbid changes in root divergence of the first molar in the lower chin on both sides, caused by enamel promontories appearing with the frequency of 30% in clinical cases in this study. Since Lindhe and Nyman suggested 2 classifications for morbid root divergence chages of the first molar on the left side of the lower chin, treatment was done using a classifications of 2-3 degrees. Al though Lindhe and Nyman sugested 3 degrees, we foused on using their 1 degree classification in treatment. We report the favorable treatment progress. J. Jpn. Soc. Periodontol., 43: 25-32, 2001

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