Irregular Facets of Neanderthal Teeth (image) University of Kansas Share Print E-Mail Caption Toothpick grooves, irregular interproximal facets and other anomalies on the left P4. a. mesial face with a small toothpick groove on the mesial-lingual edge. Above it is a very lingually positioned interproximal wear facet (arrow); b. distal surface with a deep toothpick groove and an interproximal wear facet that has an abnormal lingual location (arrow); c. chips from the occlusal/lingual margin; d. probing striations on the mesial/buccal facet. Credit David Frayer, University of Kansas Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.