INBDE (Integrated National Board Dental Examination) Practice Exam

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What signifies classic excessive VDO?

Muscles of mastication fatigue
Bennet shift
Camper's line
Coronoid notch

The correct answer is: Muscles of mastication fatigue

Excessive vertical dimension of occlusion (VDO) refers to an increase in the vertical dimension of the mandible in relation to the maxilla. One of the classic signs of excessive VDO is muscle fatigue in the muscles of mastication. When there is an excessive VDO, the muscles of mastication are forced to work harder to close the mandible properly, leading to muscle fatigue. This can result in symptoms such as soreness, fatigue, and tension in the jaw muscles. The other options are not typically associated with classic excessive VDO. Bennet shift refers to a lateral movement of the mandible during lateral excursion. Camper's line is an imaginary line drawn from the superior border of the tragus of the ear to the midpoint of the lower border of the ala of the nose, which is used in dentistry for orientation. The coronoid notch is a bony notch on the ramus of the mandible.