ブラジル人成人におけるKvaal法とCameriere法による年齢推定

Age estimation in Brazilian adults by Kvaal's and Cameriere's methods.

• Joyce Campos de Miranda
• Alana de Cássia Silva Azevedo
• Marcos Rocha
• Edgard Michel-Crosato
• Maria Gabriela Haye Biazevic

抄録

本研究の目的は、ブラジル人成人におけるKvaal法とCameriere法の2つの年齢推定法の精度と適用性を検証することであった。ブラジルの成人320名の犬歯の歯周X線写真からなるサンプルを分析し、性別（男性と女性）と年齢群（20-29歳、30-39歳、40-49歳、50-59歳）に分けて分析した。各犬歯の総合評価では，左上の犬歯（23番歯）を除き，Kvaal法はCameriere法と比較して良好な結果を示したが，平均誤差（ME）は両法間に統計的に有意な差はなかった（Kvaal: ME = 7.43, p = 0.4991，Cameriere: ME = 7.55, p = 0.6982）．年齢階級別の評価では、20-29歳と30-39歳に適用した場合、Kvaalの方法はCameriereの方法と比較して、実年齢と推定年齢の間の変動が小さいことが示された。また、40～49 歳と 50～59 歳については、Cameriere の方法の方が Kvaal の方法の結果よりも優れた性能を示した。KvaalとCameriereが提案した年齢推定法は、単純で非破壊的であり、再現性と信頼性が実証されている。20-29歳と30-39歳の年齢層ではKvaal法の方が精度が高く、40歳以上ではCameriere法の方が最も精度が高かった。

The aim of this study was to verify the precision and applicability of two methods of age estimation, Kvaal's and Cameriere's methods, among Brazilian adults. A sample composed of periapical radiographs of canine teeth belonging to 320 Brazilian adults was analyzed, divided into groups according to sex (male and female) and age group (20-29 years, 30-39 years, 40-49 years and 50-59 years). Kvaal's method presented better results when compared to the results of Cameriere's method in the general evaluation of each canine tooth, except for the upper left canine (tooth 23), which presented a mean error (ME) with no statistically significant difference between the methods (Kvaal: ME = 7.43, p = 0.4991, Cameriere: ME = 7.55, p = 0.6982). In the evaluation by age groups, Kvaal's method presented a lower variation between the real age and estimated age when applied to the age groups of 20-29 years and 30-39 years compared to the results provided by Cameriere's method. With respect to the groups aged 40 to 49 years and 50 to 59 years, Cameriere's method presented better performance than the results provided by Kvaal's method. The methods of estimating age proposed by Kvaal and Cameriere are simple and nondestructive and have demonstrated reproducibility and reliability. The Kvaal method was more accurate for the age groups of 20-29 and 30-39 years, and for those over 40 years, the Cameriere method was the most accurate.