移植のための第三大臼歯抜歯時の歯周障害発生に及ぼす歯根発育と歯根解剖学的構造の影響：組織学的研究

Influence of root development and root anatomy on the occurrence of periodontal damage during removal of third molars for transplantation: a histometric study.

抄録

本研究の目的は、移植前の第三大臼歯の抜歯によって外科的に誘発される歯周障害に及ぼす根の発育と根の解剖学的構造の影響を明らかにすることである。30本の衝撃を受けた第三大臼歯を慎重な手技で除去し、別の30本は通常の前庭骨切り術で除去し、対照とした。歯周組織の損傷は、歯根全体の連続切片で組織学的に評価され、歯根膜繊維、セメント芽細胞、セメント質層の損傷の程度を示す5つのカテゴリーに従って分類された。その結果、歯根の発育段階が成熟しているほど、歯根膜の損傷がより広範囲に及ぶことが示された。歯根の解剖学的構造が歯根膜損傷の発生に及ぼす統計学的有意差は認められなかった．

The purpose of this study was to determine the influence of root development and root anatomy on surgically induced periodontal damage to third molars resulting from removal prior to transplantation. Thirty impacted third molars were removed by a careful technique, whereas another 30 were removed by the usual vestibular osteotomy and served as controls. Periodontal damage was histometrically evaluated on serial cross sections of the whole root and classified according to five categories describing the extent of damage to periodontal fibers, cementoblasts, and the cementum layer. The results showed more extensive damage to the periodontal membrane in the more mature stages of root development. A statistically significant influence of root anatomy on the occurrence of periodontal damage was not found.