Wits Appraisal
Pronunciation: WITS uh-PRAYZ-al
A cephalometric measurement that assesses the sagittal jaw relationship by comparing the positions of Points A and B when projected perpendicularly onto the functional occlusal plane.
Full Definition
Developed at the University of the Witwatersrand, the Wits appraisal offers an alternative to the ANB angle for evaluating anteroposterior jaw discrepancy, as it is less dependent on the cranial base. Perpendiculars from Point A (AO) and Point B (BO) are dropped to the functional occlusal plane, and the distance between AO and BO is measured in millimetres. A positive value indicates the mandible is behind the maxilla (Class II tendency), whereas a negative value indicates mandibular protrusion (Class III tendency). Editors should capitalise 'Wits' as it derives from the university name and note that the term is often misspelled as 'Witts' or left uncapitalised.
Usage
Usage note: 'Wits' must be capitalised as it is an eponym derived from a proper noun. Spell as 'Wits appraisal', not 'WITS appraisal' (it is not an acronym).
In Context
- "The Wits appraisal of +6 mm confirmed a significant Class II skeletal discrepancy not fully reflected in the ANB angle." — Combined orthodontic/surgical treatment plan
- "Authors should define the functional occlusal plane used when reporting Wits appraisal values." — Journal submission guidelines