Σφακιανάκης Αλέξανδρος
ΩτοΡινοΛαρυγγολόγος
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Κυριακή 11 Ιουλίου 2021

Subdorsal Z-flap: a modification of the Cottle technique in dorsal preservation rhinoplasty

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imagePurpose of review To present the novel technique of subdorsal Z-flap in dorsal preservation rhinoplasty and give an overview on current available dorsal preservation techniques in the literature. Recent findings The subdorsal Z-flap combines the advantages of the high and low septal strip techniques in dorsal preservation rhinoplasty and ensures well tolerated treatment of the dorsal hump and structural stability. Summary The technique and concept of Dorsal Preservation Rhinoplasty (DPR) has been used for more than a century but only recently gained significant popularity along with specific technical refinements. The advantage of DPR lies in the preservation of the delicate triangular cartilaginous unity of the septal and upper lateral cartilages with its functional and esthetic implications in contrast to all resecting techniques. A variety of modifications of DPR have been published in recent years, each with advantages and disadvantages. The issue of hump recurrence remains a major concern in DPR. We describe the 'subdorsal Z-flap' and related techniques of DPR in detail, present two clinical case studies and discuss alternative technical modifications. The 'subdorsal Z -flap' combines the advantages of the high septal strip procedure with the advantages of the traditional 'low septal strip' or Cottle technique. By starting the incision at a high level, final septal height can be adjus ted precisely. By creating a triangular shape with a vertical cut below the K-Area, which is usually the highest point of the hump, significant leverage can be applied from below the hump and the septal overlap may be sutured securely for a stable correction. In combination with Piezo osteotomy and full open approach, great precision and predictability can be achieved. In a recent publication, we presented more than 100 consecutive cases of subdorsal Z-flap DPR with good functional and esthetic outcomes. The subdorsal Z-flap modification is a combination of two popular DPR techniques, fusing their advantages while minimizing risk profile. A slightly higher degree of technical difficulty and necessary tissue dissection provides the benefits of better predictability and reduction of adverse outcomes.
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