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目的:以获得更好的美学效果为目标，探讨颏颈部瘢痕挛缩畸形的手术整复策略。方法:采用回顾性观察性研究方法。2017年12月—2021年4月，陆军军医大学（第三军医大学）第一附属医院整形外科收治34例烧伤后颏颈部瘢痕挛缩畸形患者（男13例、女21例，年龄12~54岁），其中单纯颏部受累者4例、单纯颈部受累者7例、颏部和颈部均受累者23例。瘢痕面积48~252 cmn 2。对所有患者均采用扩张皮瓣进行手术治疗，治疗遵循修复皮瓣色泽与厚度匹配（match）、亚单位美学特征重构（reconstruction）、按整形原则设计切口（incision）和预防手术切口瘢痕（scar）的“MRIS”原则。Ⅰ期埋置额定容量为80~400 mL长方形或肾形皮肤软组织扩张器（以下简称扩张器），常规扩张至扩张器额定容量的3~5倍。Ⅱ期行瘢痕切除+切取扩张皮瓣修复继发创面，将供瓣区直接缝合。记录扩张器的扩张倍数（计算平均值）、采用皮瓣类型、局部美学形态重构情况、术后切口外观与皮瓣成活情况及随访观察的供受区情况。n 结果:34例患者埋置扩张器的平均扩张倍数为扩张器额定容量的3.82倍。3例患者采用单纯扩张局部带蒂皮瓣、19例患者采用单纯扩张肩胸部穿支带蒂皮瓣、10例患者采用扩张局部带蒂皮瓣联合扩张肩胸部穿支带蒂皮瓣、2例患者采用扩张局部带蒂皮瓣联合扩张胸廓内动脉第2肋间穿支游离皮瓣。瘢痕切除后，重构下唇形态和颏唇沟者10例、重构下颏突起和延长下颏长度者16例、重构颈颏角和下颌缘轮廓线者28例。手术切口较为隐蔽，多数位于颏部和颈部亚单位自然交界或转折处；颈部垂直方向切口呈Z字形或鱼尾状。34例患者术后扩张皮瓣均成活，其中8例患者扩张皮瓣术后1~3 d出现远端边缘或尖端少许坏死，换药后愈合。随访3~18个月，扩张皮瓣色泽、厚度与颏颈部皮肤差异小，颏颈部美学形态显著改善，手术切口瘢痕增生较轻。结论:基于“MRIS”原则采用扩张皮瓣整复颏颈部瘢痕挛缩畸形有利于提升手术质量，获得较好的美学效果。“,”Objective:The surgical reconstruction strategy for scar contracture deformity in chin and neck was explored, aiming to obtain better aesthetic outcome.Methods:A retrospective observational study was conducted. From December 2017 to April 2021, 34 patients with scar contracture deformity in chin and neck after burns were hospitalized in the Department of Plastic Surgery of the First Affiliated Hospital of Army Medical University (the Third Military Medical University), aged 12-54 years, including 13 males and 21 females, 4 cases with chin affected only, 7 cases with neck affected only, and 23 cases with both chin and neck affected. The scar areas were 48-252 cmn 2. All the patients were treated by operation with expanded flaps, following the “MRIS” principle of matching of the color and thickness of the repair flaps (match), reconstructing of the aesthetic features of subunits (reconstruction), design of incision according to the plastic principle (incision), and prevention of the surgical incision scar (scar). The rectangular or kidney shaped skin and soft tissue expander (hereinafter referred to as the expander) with rated capacity of 80-400 mL was embedded in the first stage, which was routinely expanded to 3-5 times of the rated capacity of the expander. In the second stage, scar resection and expanded flap excision were performed to repair the secondary wound, and the flap donor site was sutured directly. The expansion ratio of the expander (with average value being calculated), the type of flaps used, the reconstruction of local aesthetic morphology, the appearance of postoperative incision, the survival of flap, and the situation of donor and recipient sites observed during follow-up were recorded.n Results:Among the 34 patients, the average expansion ratio of the implanted expander was 3.82 times of the rated capacity of the expander. Three cases were repaired by the expanded local pedicled flap only, 19 cases by the expanded shoulder and/or chest perforator pedicled flap only, 10 cases by the expanded local pedicled flap combined with the expanded shoulder and/or chest perforator pedicled flap, and 2 cases by the expanded local pedicled flap combined with the expanded free flap of the second intercostal perforator of internal thoracic artery. After scar resection, the shapes of lower lip and chin-lip groove were reconstructed in 10 cases, chin process reconstruction and chin lengthening were performed in 16 cases, and the cervico-mental angle and mandibular margin contour were reconstructed in 28 cases. The surgical incision was concealed, most of which were located at the natural junction or turning point of the chin and neck subunits. The vertical incision of neck was Z-shaped or fishtail-shaped. All the expanded flaps in 34 patients survived after operation, of which 8 patients had minor necrosis at the edge or tip of the expanded flaps 1-3 days after operation and healed after dressing change. During the follow-up of 3-18 months, little difference in color and thickness between the expanded flap and the skin of chin and neck was observed, and the aesthetic shape of chin and neck was significantly improved, with mild scar hyperplasia of surgical incision.Conclusions:Reconstruction of scar contracture deformity in chin and neck by using expanded flaps based on the “MRIS” principle is beneficial to improve the quality of surgery and achieve better aesthetic outcome.