A Review and Modification of Dorsal Preservation Rhinoplasty Techniques.

Although conventional hump resections are a hallmark of rhinoplasty, there has been a rekindled interest in dorsal preservation (DP) techniques as a means for addressing the dorsal hump, with claims of superior functional and aesthetic results. As such, an understanding of DP, including technical considerations and outcomes, is imperative. DP allows for mobilization of the osseocartilaginous nasal vault as a single unit and thereby prevents disruption of the natural keystone area. The osseous nasal vault is managed with a transverse osteotomy and either a bilateral single lateral osteotomy (pushdown procedure) or bilateral bony wedge resections (letdown procedure) to allow for descent of the nasal dorsum. A variety of approaches to the septum exist, each differentiated by the location of cartilage resection: subdorsal, high-septal, midseptal, or inferior septum. These techniques result in pleasing dorsal aesthetic lines but may be limited by a higher rate of dorsal hump recurrence. Patency of the internal nasal valve (INV) is theoretically improved with DP. Robust series with patient-reported outcomes are lacking, although several reports and early experience at our center with a newly described high-septal resection technique do suggest positive functional and cosmetic outcomes with DP. With the recent revitalized interest in DP, an understanding of the potential benefits, techniques, and challenges associated with this surgery is helpful. Maintenance of the dorsum as a single unit has implications for maintaining structural integrity at the nasal keystone, pleasing dorsal aesthetic lines, and the patency of the INV. As surgeons continue to develop and employ these techniques, critical assessment of patient-reported outcomes and objective nasal measurements, with an emphasis on comparison with standard hump takedown techniques, will be valuable.