Dental Calculus Example (image) University of Nevada, Reno Caption Centuries ago, dental calculus would build up through the years, layer after layer, like a stalagmite, sometimes reaching impressive proportions. University of Nevada, Reno researchers have discovered that analysis of tiny fragments of this material can be used effectively in paleodietary research - the study of diets of earlier ancient and populations - without the need to destroy bone, as other methods do. Credit Photo by G. Richard Scott, University of Nevada, Reno. Usage Restrictions Credit required 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.