Powell and Humphreys proportions: profile angles
- Nerve
- Highlighted area
Quick facts
- Definition
- Set of reference angles of the facial profile described by Powell and Humphreys, used to analyze the nose, chin and neck.
- Angles
- Nasofrontal, nasofacial, nasomental and cervicomental.
- Use
- Describe the profile objectively, compare before and after and guide planning of the lower third and the nose.
- Limit
- They are references, not goals: ideal values vary with sex, age and origin.
The Powell and Humphreys proportions are a set of reference angles of the facial profile, described by the surgeons who give them their name. They form a common vocabulary for talking about the nose, the chin and the transition between the chin and the neck, and they are still used in aesthetic profile analysis.
What are the angles?
Each angle measures a relationship between points of the profile. All of them start from references that the professional can locate on the lateral photo.
| Angle | What it relates | What it usually reveals |
|---|---|---|
| Nasofrontal | Forehead and nasal dorsum, at the level of the nasion | Depth of the nasal root |
| Nasofacial | Nasal dorsum and facial plane | Slope of the nose in profile |
| Nasomental | Nasal tip and chin | Relationship between nose and chin |
| Cervicomental | Chin line and neck line | Definition of the chin and neck transition |
The published reference values are ranges, and different authors propose different ranges, varying by sex. That is why this entry does not fix numbers: what matters is knowing what each angle measures and using it consistently.
How to use them in facial harmonization practice?
The profile often reveals what the frontal view hides. A poorly projected chin (retrogenia) stands out in the nasomental angle and in the chin contour. A double chin or submental fat shows up in the cervicomental angle. A nasal root that is too shallow or too deep changes the nasofrontal angle.
Measuring is not the same as deciding. Reading the angles enters the reasoning along with the patient's concern, age, skin type and the face as a whole. An angle outside the range is neither a diagnosis nor an indication for treatment, and an angle within the range does not stop the patient from wanting a change.
Why not treat the numbers as a goal?
Because harmony is not a formula. Faces considered beautiful often fall outside the ranges, and trying to "fit" the patient to the measurements can produce a face that looks standardized. In facial harmonization, the angle guides the conversation; the decision takes into account what the patient wants and what the professional judges safe and appropriate.
What is the link with the app?
Harmy does not measure profile angles, because the projection uses only the frontal photo. Profile analysis remains a step of the in-person assessment, and the app comes in afterward, in the conversation about the frontal areas.
Also called: Powell and Humphreys angles, Powell and Humphreys profile analysis.
Frequently asked questions
What are the Powell and Humphreys angles for?
To describe the profile with objective measurements. They help locate where the imbalance is, such as a poorly projected chin or a closed cervicomental angle, but they do not define on their own what to treat.