RZ Wang, S Weiner, J Biomechanics 1998Feb;31(2):135-141 “Strain-Structure Relations in Human Teeth using Moire Fringes” See Journal


Teeth are subjected to stress during normal function. The manner in which the resulting strain is distributed within the tooth is related to its structure. The Moiré fringe technique was used to map the in-plane strain distribution in slices from human tooth crowns under compression. The strain inside enamel is much less than in dentin, and there is a roughly 200 μm thick zone in dentin beneath the dentin–enamel junction which undergoes larger strain than the central coronal dentin. This zone is softer and less mineralized than the bulk of the dentin. The strain distribution in this zone along the dentin-enamel junction shows localized maxima on both the lingual and the labial sides. This study is consistent with the hypothesis that within the dentin there are structural adaptations for transferring and minimizing stress.

“Clinical Presentation of Stress Distribution in Teeth and the Significance in Operative Dentistry” Millicich GW, Rainey JT Pract PeriodonticsAesthet Dent 2000:12(7), 695-700 .See Journal


Stress distribution in human tooth structure can be visualized through the use of Moiré fringes, which has improved the clinical understanding of recently identified anatomical structures in molar occlusal surfaces. This article discusses the concept of a “peripheral rim of enamel” and describes the manifestation of compressive and tensile fractures within the peripheral rim of enamel and dentin. It also emphasizes the benefits of microdentistry techniques and minimally invasive preparation designs in the long-term preservation of the natural tooth structure.