# Total Facial Convexity

Harmony · Side view · Facial Profile · https://www.faceiqlabs.com/support/harmony/total-facial-convexity

The angle from brow prominence through the nose tip to the chin.

## What is measured

Calculation: Oriented angle: glabella → pronasale → pogonion

Nasion means the nasal root, subnasale the nose base, and pogonion the most forward chin point. Frankfort refers to the direction from the ear-opening landmark to the lower orbital landmark.

## Why it matters

This includes nasal projection, unlike the two convexity measures that use the nose base. It shows why a prominent nose can change the apparent profile even with the same jaw position.

- Lower on a convex profile: a more closed bend at the nose tip.
- Closer to 180°: a straighter three-point relationship; reflex values preserve the opposite orientation.

## Where the idea comes from

Evidence: Clinical reference. Total-profile angles extend soft-tissue profile analysis to include the nose. The specific nose-tip construction should be distinguished from angles that deliberately exclude it.

## A worked example

Keeping the brow and chin fixed while moving the nose tip forward generally closes the convex angle.

Example values explain the calculation. They are not a target range.

## How to read your result

This angle cannot separate nose projection from chin or brow position. Read it alongside nasal projection and base-centered convexity.

## Research & further reading

These sources explain the history or related evidence. FaceIQ’s score weights and reference ranges are model settings; the papers do not collectively validate the scoring system.

- Holdaway (1984). [A soft-tissue cephalometric analysis and its use in orthodontic treatment planning. Part II](https://pubmed.ncbi.nlm.nih.gov/6585146/). Explains how lip, chin and skeletal relationships must be considered together, with a range of profiles compatible with balance.
- Tavakoli et al. (2023). [Ideal Nasal Preferences: A Quantitative Investigation with 3D Imaging in the Iranian Population](https://pubmed.ncbi.nlm.nih.gov/37564715/). Asked 203 volunteers to rate edited nose features on one male and one female model. Supports studying angles and projection together, with limits from the sampled faces and raters.

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Source: https://www.faceiqlabs.com/support/harmony/total-facial-convexity · FaceIQ Labs overview for AI assistants: https://www.faceiqlabs.com/llms.txt