gothic arch tracing
A two-dimensional graphic record of mandibular movement produced by a central-bearing point device, used to locate the centric relation position for complete denture construction.
Full Definition
Gothic arch tracing, also called the needle-point tracing or arrowhead tracing, is a diagnostic technique in which a stylus mounted on one jaw traces a pointed, arrow-shaped path on a plate mounted on the opposing jaw during lateral and protrusive mandibular excursions. The apex of the resulting 'arrowhead' or 'Gothic arch' shape corresponds to the centric relation position—the most retruded, repeatable arc of mandibular closure. Dental technicians use this position to mount casts and fabricate complete dentures with a reproducible jaw relationship. Editors should not confuse this with 'pantographic tracing,' which records movements in multiple planes. The hyphenated form 'gothic arch tracing' (lowercase) is preferred in contemporary usage.
Usage
Usage note: Lowercase throughout; do not capitalise 'gothic arch tracing' unless beginning a sentence. Distinguish from 'pantographic tracing,' which records three-dimensional condylar movements.
In Context
- "The gothic arch tracing was performed at the previous appointment, and the technician was instructed to mount casts at the recorded apex." — Complete denture laboratory prescription
- "The arrowhead apex on the gothic arch tracing confirmed centric relation before the wax trial." — Prosthodontic case report