Hemitransdomal versus Dome-Binding Suture.

The dome-binding suture (DBS) and hemitransdomal suture (HTS) are suture techniques used to narrow and define the nasal tip. The DBS can create a pinched, unnatural appearance, while the HTS puts the lateral crus in a more favorable orientation. This allows a natural contour between the nasal tip and alar lobule while maintaining alar margin support. Objective measurement of the rotational axis of the lateral crus between the DBS and the HTS has not been reported in the literature. To determine whether the DBS or HTS technique results in a more favorable rotational axis of the lateral crus as measured by the alar surface septal angle (ASSA). Open rhinoplasty with cephalic trim and placement of a DBS or HTS was performed in 6 cadaveric heads, for a total of 12 lower lateral cartilages at the VirtuOHSU Simulation and Surgical Training Center at Oregon Health and Science University (OHSU). ASSA measurements were taken at baseline and after placement of either a DBS or HTS. A total of 36 ASSA measurements were obtained. The median baseline ASSA prior to suture placement was 142 degrees (interquartile range [IQR]: 131.5-145 degrees), following DBS placement was 141 degrees (IQR: 33-150.5 degrees), and following HTS placement was 112 degrees (IQR: 108-117 degrees). There was no statistically significant difference of ASSA measurements between baseline and DBS placement (p = 0.24), but there was a statistically significant difference between baseline and HTS (p < 0.0001) and between DBS and HTS (p < 0.0001). The HTS technique creates a more favorable rotational axis of the lateral crus as compared with the DBS, as measured by the ASSA. This study provides objective data to support the use of the HTS for nasal tip contouring.

Objective Comparison of Nasal Tip Contours in the Basal View Between Dome Binding and Hemitransdomal Tip Suture Techniques in Rhinoplasty.

IMPORTANCE: The dome binding suture (DBS) used for nasal tip refinement creates the unwanted effects of nasal tip pinching owing to shadowing and loss of alar support. The hemitransdomal suture (HTS), however, refines the nasal tip while maintaining a natural contour between the nasal tip and the alar lobule. To our knowledge, no objective comparison between the DBS and HTS techniques has been described in the literature to date. OBJECTIVE: To determine whether the DBS or HTS technique results in an objectively satisfactory outcome in nasal tip contouring when assessed from the perspective of the basal view. DESIGN, SETTING, AND PARTICIPANTS: Postoperative basal view photographs of cosmetic rhinoplasty procedures performed on 112 Hispanic/Mestizo patients (85 [76%] women, and 27 [24%] men) in a facial plastic surgery practice in Chile, from May 2013 to May 2015 were reviewed. Only patients who underwent either DBS or HTS were included. Follow-up ranged from 6-24 months. Comparison of the nasal contour to the ideal tip-lobule line was performed and classified as satisfactory or unsatisfactory. MAIN OUTCOMES AND MEASURES: Satisfactory or unsatisfactory nasal tip contour in the basal view as analyzed by comparison with the ideal tip-lobule line. RESULTS: A total of 143 rhinoplasty procedures were performed over a 2-year period (May 2013-May 2015). A total of 112 patients met inclusion criteria. Of the 112 participants, mean (SD) age was 30 (9) years; 22 patients underwent DBS and 90 underwent HTS. Of the patients who underwent DBS, 5 of 22 (22.7%) had satisfactory contours. Of the patients who underwent HTS, 84 of 90 (93.3%) had satisfactory contours. CONCLUSIONS AND RELEVANCE: Comparison of nasal contour in the basal view with the ideal tip-lobule line demonstrates a statistically significant improvement in the rate of satisfactory outcomes using the HTS compared with the DBS technique. This study is the first, to our knowledge, to provide objective data to support the use of this technique when performing tip contouring in rhinoplasty. LEVEL OF EVIDENCE: 4.