上顎異所性犬歯と切歯歯根吸収および歯列不正の発生頻度と関連性

Frequency and association of maxillary ectopic canine with incisor root resorption and dental agenesis.

抄録

目的:

上顎の異所性犬歯が頬側および口蓋側に移動し、切歯歯根吸収や歯列不正を起こす頻度を評価することである。

OBJECTIVE: To assess the frequency of maxillary ectopic canine both buccally and palatally displaced with incisor root resorption and dental agenesis.

方法:

横断研究は、2019年4月8日から6月29日まで、カラチのDr. Ishrat Ul Ebad Khan Institute of Oral Health Sciences, and Dow Dental College, Dow University Of Health Sciencesの矯正科で実施し、上顎外犬歯萌出と診断された矯正患者から構成した。歯根吸収と歯根端切除はパノラマフィルムで診断された。歯根吸収は、歯根周囲X線写真でさらに確認された。データはSPSS 21を使用して分析した。

METHODS: The cross-sectional study was conducted from April 8 to June 29, 2019, at the Department of Orthodontics, Dr. Ishrat Ul Ebad Khan Institute of Oral Health Sciences, and Dow Dental College, Dow University Of Health Sciences, Karachi, and comprised orthodontic patients diagnosed with maxillary ectopic canine eruption. Root resorption and agenesis were diagnosed on panoramic films. Root resorption was further confirmed by periapical radiographs. Data was analysed using SPSS 21.

結果:

98人のうち、86人(87.8%)は頬側に犬歯が移動しており、そのうち38人(44.2%)は歯根吸収を伴っていた。一方12人(12.2%)は口蓋側に犬歯が移動しており、そのうち10人(83.3%)に歯根吸収が見られた（p＝0.011）。側切歯が30(30.6%)、中切歯と側切歯が7(7.1%)、小臼歯が5(5.1%)、側切歯と小臼歯が6(6.1%)で吸収されている。無歯顎症は10名(10.2%)に認められた(p=0.62)．

RESULTS: Of the 98 subjects, 86(87.8%) had buccally displaced canines of which 38(44.2%) were associated with root resorption, while 12(12.2%) patients had palatally displaced canines of which 10(83.3%) had root resorption (p=0.011). Overall, 30(30.6%) lateral incisors were resorbed, 7(7.1%) both central and lateral incisors, 5(5.1%) premolars, and 6(6.1%) both lateral incisors and premolars were resorbed. Agenesis was detected in 10 (10.2%) subjects (p=0.62).

結論:

上顎異所性犬歯と切歯歯根吸収および歯列不正との関連はないことが判明した。

CONCLUSIONS: There was found to be no association of maxillary ectopic canines with incisor root resorption and dental agenesis.