Nose measurement
Nasal Tip Rotation
How far the underside of the nose tilts up from the Frankfort horizontal. It isolates tip rotation from upper-lip position, which the nasolabial angle mixes together. Higher values mean an upturned tip; low or negative values a drooping one.
At a glance
- Ideal
- 13–23° (men) · 15–25° (women)
- Unit
- degrees
- Weight in the overall score
- 3
- Area
- Nose
How it is measured
∠ of Sn→Cm (the lower border of the nose) above the Frankfort horizontal
- Sn Subnasale — The point where the underside of the nose meets the upper lip.
- Cm Columella point — The point just behind the tip where the rounded tip turns into the straighter underside of the nose (the columella).
- Po Tragion (porion) — The top of the tragus — the small flap in front of the ear canal. With orbitale it defines the Frankfort horizontal.
- Or Orbitale — The lowest point of the bony eye-socket rim, just below the lower eyelid.
Ideal range and tiers
Each value falls into a tier (T1 = ideal). Comfortably inside T1 the rating is 10, easing to 9.5 at the edges of the ideal range; beyond it the rating falls with the deviation — fastest in the first tiers outside the ideal — down to 0 at the far end of the worst tier.
| Tier | Range | Rating |
|---|---|---|
| T1 Ideal | 13–23° | 9.5–10 |
| T2 Near ideal | 9–13° or 23–27° | 6.7–9.5 |
| T3 Mild deviation | 5–9° or 27–31° | 4.3–6.7 |
| T4 Moderate deviation | 1–5° or 31–35° | 2.1–4.3 |
| T5 Severe deviation | < 1° or > 35° | 0–2.1 |
| Tier | Range | Rating |
|---|---|---|
| T1 Ideal | 15–25° | 9.5–10 |
| T2 Near ideal | 11–15° or 25–29° | 6.7–9.5 |
| T3 Mild deviation | 7–11° or 29–33° | 4.3–6.7 |
| T4 Moderate deviation | 3–7° or 33–37° | 2.1–4.3 |
| T5 Severe deviation | < 3° or > 37° | 0–2.1 |
Related measurements
References
- Fitzgerald JP, Nanda RS, Currier GF. An evaluation of the nasolabial angle and the relative inclinations of the nose and upper lip. Am J Orthod Dentofacial Orthop. 1992;102(4):328–334.