Lingual markings of anterior teeth as seen in human bite marks

A review of the available literature does not reveal a plausible explanation as to why the incisal edges of maxillary anterior teeth do not always mark clearly. Generally, the mandibular incisal edges do mark with some consistency. This paper demonstrates through test bites on skin that the answer lies in the position of the mandible.     

A tale of two cities

The authors are respectively parttime professor sociology at the University of Texas (San Antonio) as well as lecturer at the medical faculty of the State University Limburg (section psychiatry) and researcher at the Research and Documentation Centre of the Ministry of Justice, Schedeldoekshaven 100, 2511 EX The Hague, The Netherlands. Dorette Courtar, a mobility programme exchange student at the University of Maastricht and the Stockholm University, assisted in the basic research. We would like to thank Paulina Loennroth and the mayor of Hulst, dr. A.A.L.G.M. Kessen, both connected to the ECAD and Paul Vasseur, Urban Weber, Suzanne Schardt, all connected to the ECDP for their information and comments.     

Comparison of fingernail striation patterns in identical twins.

The fingernail ridge patterns of a pair of identical twins were compared to each other, their parents, and an unrelated subject. The patterns of the twins' nails showed regions of strong similarity but were distinguishable from one another. Fewer similarities were found when comparing the nails to those of the parents and the unrelated control. The twins were shown to be monozygotic by means of DNA profiling. This therefore represents the first demonstration of unique fingernail ridge patterns in subjects shown conclusively to be identical twins. When the fingernail ridge patterns were examined with a scanning electron microscope, the backscattered electron (BEI) images were found to have superior contrast when compared to the secondary electron (SEI) images.