Each of the Following May Be Present in Class III

Question

Each of the following may be present in Class III occlusion EXCEPT one.Which one is the EXCEPTION?
A) Prognathic facial profile may be present.
B) The mandible may be retruded.
C) The mandible has a mesial relationship with the maxilla.
D) The incisal margins of the mandibular incisors may lie in front of the maxillary incisors.

Accepted Answer

In Class III occlusion the mandible is rarely retruded;most often it is protruded.The remaining selections correctly describe potential features of Class III occlusion.Note that Class III is often described as mesioclusion,which is in conflict with retrusion of the mandible.Further note that descriptions such as mesioclusion or distoclusion refer to the position of the mandible in relation to the maxilla.