The Fracture Pattern of Different Mandibular Over–Denture Designs

Aims: To evaluate the load at fracture for different mandibular overdentures and the positions of thefracture area for these designs. Material and methods: Ten mandibular dentures were made, each oftwo designs. The first design consisted of acrylic resin overdenture supported by two domeshaped 3mm mandibular canines copings, the second design consisted of two domeshaped copings connectedwith a rigid metallic bar. The mean and standard deviation were calculated in addition to the analysis ofvariance which showed a significant difference at P < 0.05. Results: Showed that the overdenturesupported by two dome shaped mandibular canines were more fracture resistance than the overdenturesupported with the bar. The fracture position depends on the denture design. Conclusions: The resultsindicated that the denture made entirely of acrylic resin was much more stronger than the denture withless thickness due to the incorporation on metallic rigid bar.