Dorsal aesthetic lines in rhinoplasty: a quantitative outcome-based assessment of the component dorsal reduction technique

Mojallal A, Ouyang D, Saint-Cyr M, Bui N, Brown SA, Rohrich RJ.

What this paper says

In 100 consecutive primary rhinoplasties measured on photographs more than a year after surgery, symmetry of the two curved lines running down the bridge rose from 68% to 94%, and harmonious lines rose from 32.5% to 97%.

Overview

The dorsal aesthetic lines are the two gentle curves from the brows to the tip that give the nose its shape from the front. Removing a hump can break them. The authors measured these lines before and after component dorsal reduction, a stepwise hump technique, using software that scales each face to its own pupil-to-pupil distance.

Sections of note

100 consecutive primary rhinoplasty patients from one surgeon (R.J.R.), with institutional review board consent.
All postoperative photographs taken at more than 1 year.
Software quantified dorsal line symmetry, nose width and side-to-side variation, normalized to pupil-to-pupil distance.
Mean dorsal line symmetry 68% before and 94% after surgery.
Harmonious dorsal lines in 32.5% before and 97% after.
Ability to identify the lines was similar in 74.6%, improved in 15.7% and decreased in 9.7%.
Nasal width lines were similar in 36 patients, wider in 21 and narrower in 43.
Level of evidence: therapeutic, IV.

What it means for a patient

Taking a hump down in separate steps, rather than in one cut, produced smooth and symmetric bridge lines in almost every patient at one year or more.
About 1 in 10 patients had lines that were harder to identify after surgery.
One surgeon's results, no comparison group, and the measurements are of photographs rather than patient-reported satisfaction.

Why this paper matters

It puts numbers on an aesthetic goal that surgeons usually judge by eye and documents the component technique from the group that popularized it. Whether other surgeons achieve the same figures, and how the lines relate to patient satisfaction, remain untested.

Terms

Dorsal aesthetic lines: the paired curved highlights from the brow to the tip seen on the front view.
Component dorsal reduction: removing a hump in stages, cartilage and bone separately, to keep the middle vault intact.
Middle nasal vault: the cartilage part of the bridge between the nasal bones and the tip.
Internal nasal valve: the narrow airway between the septum and the upper lateral cartilage.
Photogrammetric analysis: measurement taken from standardized photographs.
Level IV evidence: a case series without a comparison group.

Summary written by rhinoplasty.cc from the abstract, 2026-09-08; not medical advice. The authors' own abstract follows.

From the abstract

“Preservation or reconstruction of the middle nasal vault structure and internal nasal valve after dorsal reduction is challenging. The purpose of this study was to retrospectively analyze a series of 100 consecutive rhinoplasty cases with respect to preservation or restoration of the dorsal nasal lines following…”

Excerpt; the full abstract is on PubMed.