Weibull analysis method of assessing the mechanical properties of brittle dental materials

ABSTRACT

Weibul analysis is a new technique in dentistry to evaluate the mechanical properties of dental materials. The aim of the current work is to explain the different steps needed to estimate the Weibull modulus and then to estimate the amount of stresses generated within the material before failure. Three groups of dental composite [207 group] were tested for flexural testing and were compared by normal statistics ways. Different excel sheets were generated to estimate the value of Weibull modulus followed by calculating the amount of stresses generated within each material before failure. Stresses for 95% chance of fracture [MPa] for groups A to C were 104.45, 89.81 and 62.80 respectively. Stresses for 5% chance of fracture [MPa] for groups A to C were 131.91, 143.11 and 152.94 respectively. Weibull analysis is a useful tool for assessing the mechanical properties of dental materials