Accuracy of dental microwear impressions by physical properties of silicone materials

Dental microwear analysis is an oft-used paleodietary estimation method, and the impression molds or resin casts are often analyzed rather than original tooth surfaces. A choice of silicone products for dental impressions crucial because quality data affected by accuracy molds. For this reason, researchers have heavily depended on a few commercial such as “President” (Coltène/Whaledent AG, Switzerland) to avoid analytical errors caused using different materials. Considering that production business might be terminated, however, heavy reliance specific could potential weakness in field. In study, we aimed at identifying indexes physical properties materials with satisfactory accuracy. purpose, measured dynamic viscoelasticity shrinkage rates various compounds, including standard material President other eight affordable silicones. We scanned both surface confocal laser microscope conducted texture (DMTA) quantitatively compare The results showed relationships between silicones accuracy, indicating cured slowly began shrink relatively early hardening process were less accurate. Some these blurred surfaces, implying peeled off from microscopic level, speed exceed curing speed. following indices provided product information found helpful search substitutes: (1) medium viscosity, (2) short time after mixing (5–6 min), (3) delayed change shrinkage.