Description
Reorient a dental-midline difference to a right-positive convention.
Dental model coordinates depend on scale, reference midlines, laterality and unit conventions. A wire diameter conversion differs from selecting a wire or estimating force, and a planar point distance differs from a complete arch measurement. Appliance labels and local geometry do not choose treatment stages or establish clinically suitable adjustments.
Reorient a dental-midline difference to a right-positive convention.
When to use this tool
Use Dental Arch Midline Offset when you already have measuredMidline, referenceMidline, positiveIsRight and need to reorient a dental-midline difference to a right-positive convention.
How to use the tool and how it works
- Enter measuredMidline, referenceMidline, positiveIsRight. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read rightPositiveOffset. Use the output convention below.
Return (measuredMidline-referenceMidline)*(positiveIsRight?1:-1).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| measuredMidline | Measured Midline | Required. Finite number. |
| referenceMidline | Reference Midline | Required. Finite number. |
| positiveIsRight | Positive Is Right | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| rightPositiveOffset | Right Positive Offset | Required. Finite number. |
{
"input": {
"measuredMidline": 3,
"referenceMidline": 1,
"positiveIsRight": true
},
"output": {
"rightPositiveOffset": 2
}
}Limitations and assumptions
- No midline, asymmetry, clinical significance or treatment goal is detected or selected.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use calibrated dental models and the original coordinate, midline and appliance-plan definitions for a full geometric review. Keep simple unit changes and local offsets separate from choosing a wire, stage, force or treatment adjustment.
References
Similar or alternative tools
- Orthodontic Bracket Position Offset
Reorient a bracket-position difference using a supplied positive-direction sign.
- Model Scan Scale Factor
Calculate reference length per supplied scan length.