Transverse Discrepancy
A skeletal or dental mismatch in the width dimension between the upper and lower jaws, most commonly presenting as a posterior crossbite.
Full Definition
Transverse discrepancy refers to a difference in the buccolingual width relationship between the maxillary and mandibular arches. It is frequently caused by a narrow maxilla relative to the mandible and manifests clinically as a unilateral or bilateral posterior crossbite. Editors working on orthodontic and orthopedic literature must distinguish transverse discrepancies from sagittal (front-to-back) or vertical problems. Treatment typically involves palatal expansion appliances. Accurate use of this term is critical in cephalometric and model analysis sections of clinical manuscripts.
Usage
Usage note: Distinguish carefully from 'dental crossbite,' which involves tooth tipping rather than skeletal width mismatch.
In Context
- "The treatment plan addressed the transverse discrepancy with a quad-helix appliance before initiating sagittal correction." — Treatment planning document
- "Cephalometric analysis confirmed a 4 mm transverse discrepancy at the level of the maxillary first molars." — Orthodontic journal article