牙龄估计：下颌磨牙根管宽度的模式识别。18岁阈值处的一种新型下颌成熟度标志物。
Dental Age Estimation: Pattern Recognition of Root Canal Widths of Mandibular Molars. A Novel Mandibular Maturity Marker at the 18-Year Threshold.
作者信息
Roberts Graham J, Lucas Victoria S, Andiappan Manoharan, McDonald Fraser
机构信息
Department of Orthodontics, King's College London Dental Institute, Guy's Campus, London, SE1 9RT, UK.
Biostatistics and Research Methods Centre, Division of Patient and Population Health, King's College London, Denmark Hill Campus, London, SE5 9RW, UK.
出版信息
J Forensic Sci. 2017 Mar;62(2):351-354. doi: 10.1111/1556-4029.13287. Epub 2016 Dec 1.
The final stage of third molar development is used to assign a subject to above the 18-year threshold. Some subjects exhibiting this final stage are less than 18 years. Radiographs from 1000 females and 1000 males age 16.00-25.99 years were examined. Each half-year age band comprised 50 females and 50 males. Three categories of root canal widths (RCW) of the LL6, LL7, and LL8 [FDI 36, 37, and 38] were defined. Reproducibility was achieved by re-assessing the same subjects 12 months apart. For females, the minimum value for RCW-A was 16.33 years, RCW-B 17.23 years, and RCW-C 18.45 years. For males, the minimum values were RCW-A 17.16 years, RCW-B 18.29 years, and RCW-C 18.16 years. The presence of RCW-C in a female, and the presence of RCW-B or RCW-C in a male is compelling evidence that the subject is above the 18-year threshold.
第三磨牙发育的最后阶段用于判定一个人是否超过18岁的年龄界限。一些处于这一最后阶段的人年龄小于18岁。对年龄在16.00至25.99岁之间的1000名女性和1000名男性的X光片进行了检查。每个半年年龄组包括50名女性和50名男性。定义了LL6、LL7和LL8[FDI 36、37和38]的三类根管宽度（RCW）。通过在相隔12个月的时间对相同的受试者重新评估来实现可重复性。对于女性，RCW-A的最小值为16.33岁，RCW-B为17.23岁，RCW-C为18.45岁。对于男性，最小值分别为RCW-A 17.16岁，RCW-B 18.29岁，RCW-C 18.16岁。女性中出现RCW-C以及男性中出现RCW-B或RCW-C是该受试者超过18岁年龄界限的确凿证据。
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