BACKGROUND: The study of tissue-engineered cartilage with predetermined shaping and regeneration has provided novel ideas and techniques for repair of laryngeal cartilage erosion; however, due to the special natures of the morphology, location and function of laryngeal cartilage, tissue engineering research has not, to date, exhibited its ful advantages in the reconstruction of laryngeal cartilage. OBJECTIVE:To explore the feasibility of building tissue-engineered larynx-shaped cartilage using poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHH) as a scaffold filed and encapsulated with pedicled myofascial flaps. METHODS:Porous PHBHH was prepared and formed into a holow like larynx-shape, and the cel PHBHH composites were cultured for 1 weekin vitro prior to implantationin vivo. The cel-PHBHH composite was filed and encapsulated with myofascial flaps with the pedicle forin situ implantation in nine rabbits as experimental group. PHBHH scaffold with no chondrocytes was implanted alone in three rabbits as control group. Cartilage regeneration was assessed at 6, 12 and 18 weeks after surgery through morphological observation, histological and immunohistochemical detection. RESULTS AND CONCLUSION: In the experimental group, the shape and porosity (> 90%) of the material were ideal, the cels exhibited good adhesion with the material and the blood supply within the myofascial flap with pedicle was rich for effective filing and encapsulation of the cel PHBHH composite. Tissue-engineered laryngeal cartilage with the holow, semi-trumpet shape was idealy formed at 6 weeks after the surgery. Further maturation of the cartilage was observed at 12 and 18 weeks after the surgery. However, there was no cartilage tissue in the control group. This study shows that PHBHH is a suitable material for the formation of a holow, semi-trumpet shape with good celular compatibility. Myofascial flap filing and encapsulating can be used to build tissue-engineered laryngeal cartilage with a holow, semi-trumpet shape.%背景：再生预定形态组织工程软骨的研究为喉软骨病损的修复与重建提供了新思路与新方法。然而，由于喉软骨形态、部位与功能的特殊性，迄今在此领域软骨组织工程研究并未呈现出其应有的优势。目的：探讨带蒂肌筋膜组织瓣构建组织工程喉支架形态软骨方法，为肌筋膜瓣复合组织工程化软骨修复重建喉软骨支架功能提供实验依据。方法：采用溶剂浇铸、模压成形和颗粒滤沥方法制备喉支架形态聚羟基丁酸酯与聚羟基己酸酯共聚物聚羟基丁酸酯与聚羟基己酸酯共聚物聚羟基丁酸酯与聚羟基己酸酯共聚物生物材料塑形物，接种软骨细胞形成细胞-聚羟基丁酸酯与聚羟基己酸酯共聚物复合物，体外共同培养1周后用于体内植入。将新西兰白兔脊背部一侧骶棘肌及其筋膜制备肌筋膜组织瓣，采用筋膜衬里方法充填与包裹软骨细胞聚羟基丁酸酯与聚羟基己酸酯共聚物喉支架形态复合物，原位植入。将单纯聚羟基丁酸酯与聚羟基己酸酯共聚物喉支架体内植入的兔作为对照组。分别于术后6，12和18周取材，行大体形态观察、组织学和免疫组化检测评估喉支架形态组织工程化软骨成形与再生情况。结果与结论：制备的聚羟基丁酸酯与聚羟基己酸酯共聚物多孔生物材料塑形物呈中空半面喇叭状，形似喉支架形态，乙醇静态容积测定孔隙率>90%。筋膜衬里的带蒂肌筋膜组织瓣血运丰富，可有效充填与包裹喉支架形态塑形物。不同时间点均获取形态维持良好的喉支架形态组织工程软骨，组织学和免疫组化检测均证实体内植入6周即可形成软骨组织，12周及18软骨组织进一步成熟，而对照组体内植入未检测到软骨组织。结果证实，带蒂肌筋膜组织瓣可保障血运，采用筋膜衬里的肌筋膜组织瓣充填与包裹方法可构建喉支架形态组织工程软骨。
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