West China Journal of Stomatology

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Synthesis and characteristics of integrated bionic mandibular condylar scaffold

 Xi Weihong1, Wang Zhen1, Zhu Hongshui1, Li Xiaofeng2, Xiong Yuanfei2   

  1. 1. Dept. of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanchang University, Nanchang 330006, China; 2. Dept. of Orthopaedics, The First Affiliated Hospital of Nanchang University, Nanchang 330006, China
  • Online:2016-02-01 Published:2016-02-01


Objective  This study aims to construct a chitosan (CS)–polycaprolactone (PCL)–hydroxyapatite (HA) composite biomimetic scaffold to replace condyle and to explore the tissue engineering applications of condylar. Methods  A resin mold of the mandibular condyle was prepared by using rapid prototyping techniques. A mandibular condylar integrated biomimetic scaffold model was prepared by solution casting-ice Lek. PCL and CS were mixed at a ratio of 4︰1. HA at quality ratios of 40%, 50%, 60%, and 70% was added to groups a, b, c, and d, respectively. The microscopic morphology, porosity, infrared spectra, X-ray diffraction pattern, and mechanical properties of the scaffold were observed. Results The scaffold that includes both upper and lower parts displayed the same features (i.e., shape, yellow-white appearance, and hard texture) as the mandibular condyle. Scanning electron microscopy showed that the composite scaffold had a 3D network spatial structure, 70%–85% porosity, and 10–200 μm pore size. Infrared spectra showed that the peak intensity reduced with decreasing HA content. X-ray diffraction showed that the diffraction peak decreased with increasing HA content. Suitable tensile and compressive and flexural strength were discovered in the presence of 50% HA. Conclusion  The scaffold prepared by solution casting-ice Lek shows favorable comprehensive features and is expected to replace human condylar.

Key words: mandibular condyle, bone tissue engineering, biomimetic scaffolds, chitosan, polycaprolactone, hy-droxyapatite