Craze lines are small vertical cracks in the enamel of your teeth. They aren’t painful, but they can be unsightly.‌ Craze lines aren’t usually a health problem. But what causes them might be. Dentin.

Figure 1 shows a spline shaft and teeth together. The teeth of a hob form a trapezia with two lines from sides under angle @. See Figure 1, which shows a spline shaft and teeth, pictured together. If ...

The shape, length and width of maxillary anterior teeth are open to interpretation, including mathematical, physiological and psychological. Tooth alignment, in three dimensions, creates a pleasing ...

Invention of the gear-hobbing process about 150 years ago revolutionized not only gear fabrication, but also gear design. Basically, a hob or shaper cutter traverses the gear blank to generate teeth.