Braga S, Pereira M L, Sampaio-Maia B, Caldas I M
Faculdade de Medicina da Universidade do Porto, Portugal.
Faculdade de Medicina Dentária da Universidade do Porto, Portugal.
J Forensic Odontostomatol. 2020 Sep 30;38(2):40-46.
Lip print patterns are referred to as unique to each individual, but controversy exists surrounding twins. In this study, the lip prints of 19 pairs of monozygotic and 47 pairs of dizygotic twins were studied. The left lower lip was photographed and the furrows were classified using Renaud's classification. Results showed the same lip pattern was found only in one monozygotic pair (5.3%) and in 4 dizygotic pairs (8.5%), and no significant statistical differences were found between groups (p > 0.05). In monozygotic twins only type C furrows presence displayed statistical significant differences (p=0.034). As for dizygotic twins, there were statistical significant differences in the frequency of type A (p=0.005) and type G furrows (p=0.018). As for the most common types, both groups displayed a higher prevalence of vertical furrows (type B: 97.4% and 96.8%, type A: 86.8% and 87.2%, in monozygotic and dizygotic, respectively). The least frequent furrow type was type I and type E in monozygotic (2.6% and 5.3%, respectively) and types E, F and I, in dizygotic (6.4%, 7.4%. and 7.4%, respectively). Our results seem to point out that lip print patterns should be useful carefully in twins' identification.
唇纹模式被认为对每个人来说都是独特的，但围绕双胞胎存在争议。在本研究中，对19对同卵双胞胎和47对异卵双胞胎的唇纹进行了研究。拍摄左下唇照片，并使用雷诺分类法对皱纹进行分类。结果显示，仅在一对同卵双胞胎（5.3%）和4对异卵双胞胎（8.5%）中发现了相同的唇纹模式，两组之间未发现显著的统计学差异（p>0.05）。在同卵双胞胎中，仅C型皱纹的存在显示出统计学显著差异（p=0.034）。对于异卵双胞胎，A型（p=0.005）和G型皱纹的频率存在统计学显著差异（p=0.018）。至于最常见的类型，两组中垂直皱纹的患病率都较高（同卵双胞胎中B型分别为97.4%和96.8%，A型分别为86.8%和87.2%；异卵双胞胎中B型分别为97.4%和96.8%，A型分别为86.8%和87.2%）。同卵双胞胎中最不常见的皱纹类型是I型和E型（分别为2.6%和5.3%），异卵双胞胎中是E型、F型和I型（分别为6.4%、7.4%和7.4%）。我们的结果似乎表明，唇纹模式在双胞胎识别中应谨慎使用。
