Zirconia is unique in its polymorphic crystalline makeup, reported to be sensitive to manufacturing and handling processes, and there is debate about which processing method is least harmful to the final product. Currently, zirconia restorations are manufactured by either soft or hard-milling processes, with the manufacturer of each claiming advantages over the other. Chipping of the veneering ...

I n its decision of Philippe H. Moransais v. Paul S. Heathman, et al., 24 Fla. L. Weekly S308 (Fla. July 1, 1999),1 the Florida Supreme Court held the Economic Loss Rule (ELR) to be inapplicable to negligence actions against engineers and other professionals. This sudden but welcome detour arrived after more than a decade of case law which stretched, sculpted, and misapplied a product liability...

The chipping process in a brittle material subjected to a uniformly applied edge load has been investigated. The present analysis extends earlier work by recognizing that as the chip is formed it may bend and change the loading at the crack tip. This geometry change introduces a nonlinear effect and has significant influence on the phenomenon. The nonlinear effect was demonstrated by incorporat...

The effects of the Engineered Micro-Geometry (EMG) carbide teeth circular saws on their wear rate and resulting sawing variation for 2-time intervals were studied. objective was to improve resistance used during primary transformation wood. tests carried out under industrial production conditions with two series saws; 1- up-sharp tips, 2- cutting edges honed adopt a waterfall geometry. duration...