Occlusal Vertical Dimension Calculator
OVD determination from facial measurements.
Inputs
Results
Calculated OVD (mm)
62
OVD change needed (mm)4
Change acceptable (0/1)1
Freeway space status (1-3)2
Provisional recommended (0/1)1
Adaptation period (weeks)4
Facial Proportion Ok1%
Recommended OVD62
How to Use This Calculator
- Enter Rest vertical dimension (mm), Freeway space (mm), and Existing OVD (mm).
- Set Facial thirds ratio.
- Review the Calculated OVD (mm) result.
- Use OVD change needed (mm) and Change acceptable (0/1) to inform your decision.
How the result changes with Rest vertical dimension (mm)
| Rest vertical dimension (mm) | Calculated OVD (mm) |
|---|---|
| 45 | 42 |
| 58 | 55 |
| 73 | 70 |
| 85 | 82 |
What each input means
- Rest vertical dimension (mm)
- Distance between reference points at rest position.
- Freeway space (mm)
- Interocclusal distance at rest (normal: 2-4mm).
- Existing OVD (mm)
- Current occlusal vertical dimension measurement.
- Facial thirds ratio
- Ratio of lower 1/3 to middle 1/3 facial height (ideal = 1.0).
What each result means
- Calculated OVD (mm)
- OVD calculated from rest position minus freeway space.
- OVD change needed (mm)
- Change from existing OVD (positive = increase).
- Change acceptable (0/1)
- 1 = change within tolerable range (<=5mm).
- Freeway space status (1-3)
- 1 = inadequate, 2 = normal, 3 = excessive.
- Provisional recommended (0/1)
- 1 = recommend provisional to test new OVD.
- Adaptation period (weeks)
- Expected patient adaptation time.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersRest vertical dimension (mm) = 65, Freeway space (mm) = 3, Existing OVD (mm) = 58, Facial thirds ratio = 1 = 4 input(s) provided
- Calculate Calculated OVDCalculated OVD62 = 62
- Calculate OVD change neededOVD change needed4 = 4
- Calculate Change acceptableChange acceptable1 = 1
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