Sheets H David, Bush Peter J, Brzozowski Cynthia, Nawrocki Lillian A, Ho Phyllis, Bush Mary A
Department of Physics, Canisius College, 2001 Main Street, Buffalo, NY, USA.
J Forensic Sci. 2011 May;56(3):621-6. doi: 10.1111/j.1556-4029.2011.01731.x. Epub 2011 Mar 1.
Forensically identifying a suspect's dentition from a bitemark in an open population requires the supposition that every person's dental alignment is different. There have been few studies that have tested this claim. Four hundred and ten lower anterior dentitions from a selected population and 110 lower anterior dentitions from one that was orthodontically treated were measured using geometric morphometric analysis, allowing comparison of arch shape. Dental match rates of 1.46% and 42.7% of individuals were found in the respective populations, given an established measurement error. Orthodontic treatment had a strong effect on match rate suggesting that treated or naturally well-aligned dentitions may be indistinguishable. Sexual dimorphism was found to be only slightly significant. Principal shape variation in both populations was degree of arch curvature. Results of studying these populations show that dental matches can occur, and that statements of certainty concerning individualization in such populations should be approached with caution.
在公开人群中通过咬痕对嫌疑人的牙列进行法医鉴定，需要假定每个人的牙齿排列都不同。很少有研究对这一说法进行验证。使用几何形态测量分析对从选定人群中获取的410例下颌前牙列以及110例接受过正畸治疗人群的下颌前牙列进行测量，以便比较牙弓形状。在既定测量误差情况下，在各自人群中发现个体的牙齿匹配率分别为1.46%和42.7%。正畸治疗对匹配率有很大影响，这表明经过治疗或自然排列良好的牙列可能难以区分。发现性别二态性仅略有显著性。两个群体的主要形状变化都是牙弓弯曲程度。对这些人群的研究结果表明，牙齿匹配可能会发生，对于此类人群中个体化的确定性陈述应谨慎对待。
