Department of Oral Radiology, Affiliated Stomatological Hospital of Sun Yet-sen University, Guangzhou, China.
Int J Legal Med. 2010 Mar;124(2):119-23. doi: 10.1007/s00414-009-0379-y. Epub 2009 Nov 12.
In order to study the chronology of age of third molar mineralization of Han in southern China, Demirjian staging method was used to determine the stage of four third molars (18, 28, 38, 48) mineralization in 3,100 Han in southern China aged 4.1-26.9 years based on radiological evidence from digital orthopantomograms. The mean age of the 3,100 patients was 15.96 +/- 4.73 years, including 1,200 male (mean age, 15.32 +/- 4.62) and 1,900 female (mean age, 16.35 +/- 4.76). Results show that there was no significant difference in mineralization between 18 and 28 and 38 and 48 of male or female. However, significant difference was observed between 28 and 38 of female at stage C; 28 was 0.25 years earlier than 38. In male, at stage G, 38 was 0.61 years earlier than 28, and 48 was 0.62 years earlier than 18. At stages D, E, F, G, and H, male 48 was 0.34, 0.66, 0.72, 1.34, and 0.76 years earlier than that of female, respectively. At stages A, D, E, F, G, and H, male 38 was 0.73, 0.26, 0.56, 0.91, 1.29, and 0.70 years earlier than that of female, respectively. At stages B, E, F, G, and H, the mineralization mean age of male 18 was 0.54, 0.50, 0.76, 0.92, and 0.58 years earlier than that of female, respectively. At stages E, F, G, and H, the mineralization mean age of male 28 was 0.51, 0.76, 0.92, and 0.49 years earlier than that of female, respectively. After reviewing the literature, the chronological mineralization age of 48, at stages D to G, of Han in southern China was 1 to 4.6 years earlier than that of Japanese and 1 to 3 years earlier than that of German. The mean age at stage H of 48 of Han in southern China was similar to Turkish, Black African, Japanese, and German, but was later than Spanish. Finally, the conclusions are: (1) in the same gender group of Han in southern China, the mineralization ages between two sides in upper or lower jaw are very similar, and (2) the chronology mean age and complete time of third molar mineralization of male were earlier than that of female.
为了研究中国南方汉族第三磨牙矿化的年龄分期，我们采用 Demirjian 分期法，根据数字化曲面体层片的影像学证据，对 3100 名年龄在 4.1-26.9 岁的中国南方汉族人的四颗第三磨牙（18、28、38、48）的矿化分期进行了研究。3100 名患者的平均年龄为 15.96 +/- 4.73 岁，其中男性 1200 名（平均年龄 15.32 +/- 4.62），女性 1900 名（平均年龄 16.35 +/- 4.76）。结果表明，男性和女性的 18 和 28 以及 38 和 48 的矿化之间没有显著差异。然而，在女性的 C 期，28 比 38 有显著差异；28 比 38 早 0.25 年。在男性中，在 G 期，38 比 28 早 0.61 年，48 比 18 早 0.62 年。在 D、E、F、G 和 H 期，男性 48 比女性分别早 0.34、0.66、0.72、1.34 和 0.76 年。在 A、D、E、F、G 和 H 期，男性 38 比女性分别早 0.73、0.26、0.56、0.91、1.29 和 0.70 年。在 B、E、F、G 和 H 期，男性 18 的矿化平均年龄比女性早 0.54、0.50、0.76、0.92 和 0.58 年。在 E、F、G 和 H 期，男性 28 的矿化平均年龄比女性早 0.51、0.76、0.92 和 0.49 年。在回顾文献后，我们发现中国南方汉族人 48 牙在 D 至 G 期的矿化年龄比日本人早 1-4.6 年，比德国人早 1-3 年。中国南方汉族人 48 牙在 H 期的平均年龄与土耳其人、黑非洲人、日本人、德国人相似，但晚于西班牙人。最后得出结论：（1）在同一性别组的中国南方汉族人中，上下颌两侧的矿化年龄非常相似；（2）男性第三磨牙矿化的平均年龄和完成时间早于女性。
