In order to describe molar enamel thickness more accurately, a new measurement method using a laser triangulation system has been developed and itsrepeating accuracy was tested. The method was then applied to investigate the changing pattern of lateral enamel thickness along the distal protoconid crest. The results indicated that lateral enamel thickness at different sections tends to be comparable in relation to distance from the dentine tip. We expect this method to become an effective tool to investigate not only thickness of enamel but also its three-dimensional morphology.

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