Dorion R B
J Forensic Sci. 1987 May;32(3):690-7.
Transillumination of bite mark evidence is a technique whereby the presence of subcutaneous hemorrhage can be visualized without having to section through the bite mark. This is a nondestructive technique. The presence of subcutaneous hemorrhage indicates that the bite mark was inflicted before death or perimortem. In addition, the technique proves invaluable in determining the orientation of the bite mark. This is particularly helpful when a bite mark is poorly defined, barely visible, or obscured by other superimposed bite marks or traumatic injury patterns. Observation of the subcutaneous hemorrhage by transillumination may provide an indication of the horizontal alignment of the aggressor's dentition since the force of occlusion used in delivery of the bite mark is a factor in the presence and intensity of the hemorrhage. Transillumination supports a conclusion that there may be two types of hemorrhagic patterns in bite mark evidence. Lastly, when transillumination is used in conjunction with visual aids, it can facilitate communication of bite mark evidence to other expert witnesses or to the jury in trial presentation or both.
咬痕证据的透照法是一种技术，通过该技术可以在不切开咬痕的情况下观察到皮下出血的存在。这是一种非破坏性技术。皮下出血的存在表明咬痕是在死亡前或濒死期形成的。此外，该技术在确定咬痕的方向方面具有极高价值。当咬痕定义不清、几乎看不见或被其他叠加的咬痕或创伤损伤模式掩盖时，这一点尤其有用。通过透照观察皮下出血可以显示攻击者牙列的水平排列情况，因为咬痕形成时的咬合力量是出血存在及强度的一个因素。透照法支持这样一个结论，即咬痕证据中可能存在两种出血模式。最后，当透照法与视觉辅助手段结合使用时，它可以便于在审判陈述中将咬痕证据传达给其他专家证人或陪审团，或者两者皆可。
