Why do molars get sharp edges and require floating?

The upper jaw is normally wider than the lower jaw, allowing for a somewhat circular chewing motion, which involves a process known as lateral excursion. This motion allows for a grinding of feedstuffs, creating sharp edges on the outside (buccal) or cheek of the upper molars. Many horses have sharp edges which require floating of the whole tooth surface. It is recommended that the young horse's teeth be floated prior to bitting.

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