1 March 2007 Holographic detection of a tooth structure deformation after dental filling polymerization
Author Affiliations +
J. of Biomedical Optics, 12(2), 024026 (2007). doi:10.1117/1.2714056
An experimental technique to reveal the effects of dental polymer contraction is established to choose the most appropriate polymerization technique. Tooth deformation following a dental filling polymerization is analyzed using double-exposure holographic interferometry. A caries-free, extracted human molar is mounted in dental gypsum and different cavity preparations and fillings are made on the same tooth. Dental composite fillings are polymerized by an LED light source especially designed for this purpose. Holographic interferograms are made for occlusal (class I), occlusomesial (class II), and mesioocclusodistal (class II MOD) cavities and fillings. Maximum intercuspal deformation ranges from 2 μm for the class I cavity to 14 μm for the MOD class cavity. A finite element method (FEM) is used to calculate von Mises stress on a simplified tooth model, based on experimental results. The stress varies between 50 and 100 MPa, depending on the cavity type.
Dejan V. Pantelic, Larisa Blazic, Svetlana Savic-Sevic, Bratimir M. Panic, "Holographic detection of a tooth structure deformation after dental filling polymerization," Journal of Biomedical Optics 12(2), 024026 (1 March 2007). http://dx.doi.org/10.1117/1.2714056



FDA class II medical device development



FDA class I medical device development

Finite element methods

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