A biomechanical comparison of vertical figure-of-eight locking suture for septal extension grafts
- Author(s)
- Kihwan Han; Hyun Seok Jin; Tae Hyun Choi; Jun Hyung Kim; Daegu Son
- Keimyung Author(s)
- Han, Ki Hwan; Kim, Jun Hyung; Son, Dae Gu
- Department
- Dept. of Plastic Surgery (성형외과학)
- Journal Title
- Journal of Plastic, Reconstructive & Aesthetic Surgery
- Issued Date
- 2010
- Volume
- 63
- Issue
- 2
- Keyword
- Septal extension graft; Vertical figure-of-eight locking suture
- Abstract
- Septal extension grafts are performed in order to correct the conformation of the
nasal tip and columella. The more strongly the graft is fixed to the columellar L-strut of the
septal cartilage, the better is the outcome of grafting. This article reports the development
of a vertical figure-of-eight locking suture technique and its biomechanical comparison with
other suture techniques. Pieces of porcine rib cartilage 20 15 1 mm (or 2 mm) in size were
used for the study. Two pieces of cartilage were fixed using two simple interrupted sutures in
the first group, two horizontal figure-of-eight locking sutures in the second group and the
vertical figure-of-eight locking suture in the third group. Shearing, buckling and tensile forces
were measured with respect to the direction of forces that occur in vivo. The mean shearing
force for cartilages that were 1 mm in thickness was 0.70, 0.74 and 1.04 N (PZ0.056) in the
first, second and third group, respectively. The mean buckling force was 1.10, 1.09 and 1.39 N
(PZ0.030), and the mean tensile force was 1.86, 1.78 and 2.24 (PZ0.042), respectively. For
cartilages that were 2 mm in thickness, the mean shearing force was 1.19, 1.29 and 1.54 N
(PZ0.216), the mean buckling force was 1.74, 1.50 and 2.25 (PZ0.002) and the mean tensile
force was 2.00, 1.81 and 2.29 (PZ0.023) in the first, second and third group, respectively. The vertical figure-of-eight locking suture technique was developed as an alternative technique for
suturing a septal extension graft to the columellar L-strut, and it enables firm fixation with the
use of the fewest number of stitches.
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