Because grinding often occurs during sleep, most people are unaware that they grind their teeth. However, a dull, constant headache or sore jaw when you wake up is a telltale symptom of bruxism. Many times people learn that they grind their teeth by their loved one who hears the grinding at night. If you suspect you may be grinding your teeth, talk to your dentist. He or she can examine your mouth and jaw for signs of bruxism, such as jaw tenderness and excessive wear on your teeth.
The premolar teeth, or bicuspids, are transitional teeth located between the canine and molar teeth. In humans, there are two premolars per quadrant in the permanent set of teeth, making eight premolars total in the mouth.
Of the two-rooted premolars, 70 (49.3%) teeth had separate roots, whilst 37 (26%) had fused roots. Thirteen (9.2%) premolars had three roots. Of those premolars presented as having three root forms, five (3.5%) had separate roots, five (3.5%) had fused buccal roots, and three (2.1%) had fused all roots (Fig. 1).