Interarch Distance
The vertical space between the occlusal or incisal surfaces of opposing arches, measured at a defined mandibular position.
Full Definition
Interarch distance refers to the measurable space between the maxillary and mandibular dental arches, usually assessed at rest position or at a specific functional position. It determines whether adequate room exists for restorative materials, denture teeth, and prosthetic components such as implant abutments or bar attachments. Insufficient interarch distance is a common prosthetic complication, particularly in implant prosthetics. Editors should note that 'interarch distance' is distinct from 'occlusal vertical dimension' (the measured vertical dimension of the face at tooth contact) and from 'freeway space' (the distance between the arches at physiological rest).
Usage
Usage note: Specify the mandibular position (rest, centric occlusion, etc.) at which the measurement was taken to ensure reproducibility in clinical documentation.
In Context
- "Cone-beam CT analysis confirmed that the interarch distance was insufficient to accommodate standard implant abutment components." — Implant planning report
- "The author used 'interarch distance' and 'freeway space' interchangeably — the editor flagged this as a clinical terminology error." — Peer-review editorial note