第三大臼歯に関する肉眼的および放射線学的観察

概要

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Third molars are the teeth known to degenerate most, and to their inisdence of extraction is high. In this report we observed wisdom teeth by macro findings and rotational panoramic radiography. The investigation was carried out on clinical students, 99 males and 19 females, in a photograph study. The existence or presence of wisdom teeth, present teeth number, past histology of exodontia and the location, as well as the conditions of erupution, plantation and formation were determined. The investigation showed 50.0% complete erupution, as 13.5% half eruption and 36.5% uneruputed in the upper jaw, this was 36.5%, 30.4% and 33.3% in the lower jaw and condition of plantation was vertical 81.7%, tiped 15.9%, horizontal 0.8% and else 1.6% in the upper jaw, in the lower jaw it was 46.7%, 20% and 33.3%. The condition of formation was mainly over 2/3 in both upper and lower jaws.
北海道医療大学の論文
1992-06-30