Overjet Measurement Tool
Actual upper-minus-lower incisal horizontal coordinate in independently aligned anterior-positive plane. Reverse overjet negative; not diagnose malocclusion, select treatment or infer three-dimensional position.
Description
Overjet is a signed horizontal relationship between matched incisor landmarks.
Overjet is a signed horizontal relationship between matched incisor landmarks.1
Both coordinates need the same axis, origin and millimeter basis. Use this tool to calculate the stated observation or conditional model from supplied measurements.
When to use Overjet Measurement Tool
Use this tool to calculate the stated observation or conditional model from supplied measurements. Establish the qualified examination or measurement context, matching instrument/protocol edition, site order and units.
How to use Overjet Measurement Tool and understand its results
- Establish the qualified examination or measurement context, matching instrument/protocol edition, site order and units.
- Enter independentlyMeasuredUpperIncisorCoordinateMm, independentlyMeasuredLowerIncisorCoordinateMm, using the field meanings and rules below, then run the tool.
- Read result.signedObservedOverjetMm. Interpret each field using the units, signs and evidence rules below.
- If input validation fails, correct the reported field and run again. Before applying a successful result, check the stated reference scope, units, assumptions and any retained unknown evidence.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| independentlyMeasuredUpperIncisorCoordinateMm | Independently measured upper incisor coordinate mm | number | Required |
| independentlyMeasuredLowerIncisorCoordinateMm | Independently measured lower incisor coordinate mm | number | Required |
Require finite upper and lower incisor coordinates on one matched millimeter axis, with each absolute value≤1000. Return upper−lower, preserving the sign. No landmark identification or clinical threshold is inferred.
signedOverjetMm=upperIncisorCoordinateMm−lowerIncisorCoordinateMm Apply the field units and exact ordering, boundary and evidence rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Structured result containing the calculation or selected reference fields below | object |
| result.signedObservedOverjetMm | Signed Observed Overjet Mm; use the units, sign convention and calculation stated above | number |
{
"input": {
"independentlyMeasuredUpperIncisorCoordinateMm": 5,
"independentlyMeasuredLowerIncisorCoordinateMm": 2
},
"output": {
"result": {
"signedObservedOverjetMm": 3
}
}
}Limitations and assumptions
Both coordinates need the same axis, origin and millimeter basis. Results depend on the independently established measurement basis and the exact model assumptions above.
Every listed input requires an explicit value. Unexpected fields, incorrect value types, nonfinite numbers and sparse numeric arrays fail validation; tool-specific bounds and alignment rules apply as described above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful calculation that reports a false comparison or retains unknown evidence.
Alternative or Complementary methods
Use Overbite Depth Percent Calculator to examine a related aspect: Overbite percentage relates signed vertical incisor overlap to a matched lower-incisor crown height.
Use Bolton Arch Length Discrepancy Calculator where its separate inputs and scope apply: Arch space discrepancy compares available perimeter with the summed tooth widths needed on the same basis.
References
-
Overjet Measurement Tool — tool.io
Similar or alternative tools
- Overbite Depth Percent Calculator
Overbite percentage relates signed vertical incisor overlap to a matched lower-incisor crown height.
- Bolton Arch Length Discrepancy Calculator
Arch space discrepancy compares available perimeter with the summed tooth widths needed on the same basis.