Vertical Dimension of Rest
The postural face height when the mandible is in its natural rest position, with the teeth slightly apart; used as a reference in full-denture and occlusal rehabilitation cases.
Full Definition
The vertical dimension of rest (VDR) is the measured facial height observed when the mandible adopts its habitual physiological rest position, resulting in a small interocclusal space (the freeway space) between the upper and lower teeth. In dental laboratory practice, the VDR serves as a reference point from which the occlusal vertical dimension (OVD) is established; the difference between the two is the freeway space, typically 2–4 mm. Editors must not conflate VDR with OVD: OVD is measured at tooth contact, while VDR is measured at mandibular rest. The abbreviation VDR is used in laboratory and clinical notes.
Usage
Usage note: Do not use VDR and OVD interchangeably. Always define abbreviations at first use in clinical and laboratory documents.
In Context
- "The clinician recorded the vertical dimension of rest at 68 mm to guide the wax rim fabrication." — Laboratory prescription
- "Authors should clarify whether measurements cited refer to VDR or OVD, as these are distinct clinical values." — Manuscript review comment