Surgical Repair for Macrostomia: Significance of Z-Plasty Limb Directions

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The objective of this study was to determine whether the direction of Z-plasty limbs incorporated into the surgical repair for macrostomia had a significant influence on the quality of the resultant scar. A total of 41 patients who underwent macrostomia repair by means of the same technique, and who had a follow up period of at least 2 years, were retrospectively reviewed through postoperative photographs and medical records. Quality of scar, lip symmetry, and commissure shape and thickness were recorded. Our results showed that a more favorable scar would be achieved in the medial limb of the Z-plasty if it was planned parallel to relaxed skin tension lines (P < 0.05). An unfavorable scar would be more likely if the medial limb of the Z-plasty was made in a horizontal direction or perpendicular to relaxed skin tension lines (P < 0.05). The quality of scar in both the central and lateral limbs of the Z-plasty was not significantly influenced by their direction.

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