Dorsal Preservation versus Component Dorsal Hump Reduction Rhinoplasty: An Assessment of Patient-reported Outcomes

Overview

Little published work compares patient reported outcomes between dorsal preservation, which keeps the bridge surface intact, and component hump reduction, which removes the hump layer by layer. The authors conducted a systematic review with proportion meta-analysis to fill that gap, pooling results from both techniques and comparing them.

Sections of note

• Design: systematic review with proportion meta-analysis, analyzed in Stata.
• 25 studies met inclusion criteria, pooling 1706 participants: 13 studies on component reduction and 12 on preservation.
• Overall satisfaction ranged from 84 to 100 percent across studies.
• Subgroup analysis found no statistical difference in satisfaction between the techniques, p equal to 0.18.
• Revision occurred in about 2 of 100 patients overall, 95 percent interquartile range 0 to 4.
• Component reduction produced a 53.7 point reduction in the SCHNOS cosmetic score, p less than 0.001, and a 27.3 point improvement in the obstruction score, p equal to 0.02.
• Preservation produced a 55.3 point reduction in the cosmetic score, p less than 0.001, and a 19.5 point change in the obstruction score, p less than 0.001.
• Stated conclusion: component reduction may be better for relieving blockage.

What it means for a patient

• Both techniques produced very high satisfaction and similar improvement in appearance scores.
• The difference lay in breathing, where the conventional technique showed a larger average improvement, though the confidence range for that estimate was wide.
• Revision was needed in roughly 1 in 50 patients across both techniques combined.
• Limits: pooled single group studies rather than head to head trials, so the two techniques were used on different patients by different surgeons.

Why this paper matters

The preservation versus structural debate has been argued largely on theory and single group series. Pooling 1706 patients on a validated questionnaire is the closest the literature comes to a direct comparison. Because no randomized head to head trial exists, differences in patient selection could account for the breathing result.

Terms

• Dorsal preservation: lowering the bridge while keeping its natural surface intact.
• Component dorsal hump reduction: lowering the bridge by trimming its bone and cartilage layers separately.
• SCHNOS: a validated questionnaire with subscales for nasal appearance and blockage.
• Meta-analysis: statistical pooling of results from multiple studies.
• Random-effects model: a pooling method that allows for real differences between studies.
• Confidence interval: the range within which the true value most likely lies.