Journal of Oral Tissue Engineering

Evaluation of a 3-D, Woven-fabric, Composite Scaffold Using Experimental Canine models of Bone Defects in Mandibles

Shunsuke BABA1, Yoshiya HASHIMOTO2, Takeomi INOUE1, Daisuke KIMURA3, Saeko SUMIKURA4, Yumi SONODA4, Yoichi YAMADA5, Kenji ITO5, Masaki HOJO6 and Taiji ADACHI7
1Department of Regenerative Medicine, Foundation for Biomedical Research and Innovation, Kobe, Japan
2Department of Biomaterials, 3Department of Periodontology, 4Department of Orthodontics, Osaka Dental University, Osaka, Japan
5Department of Oral and Maxillofacial Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
6Department of Mechanical Engineering and Science,
7Department of Biomechanics, Research Center for Nano Medical Engineering Institute for Frontier in Medical Sciences, Kyoto University, Kyoto, Japan

J Oral Tissue Engin 2011;8(3): 212-221

A woven-fabric scaffold, composed of biodegradable poly-L-lactic acid resin fibers and injected with marrow-derived mesenchymal cells mixed with platelet-rich plasma, was developed to evaluate the in vivo performance of a cell-scaffold graft material in experimental bone defects created in the dog mandible. Defects of regular shape and significant size were created at furcation sites and on the mesial aspects of lower premolar roots and then treated with graft material and subjected to histological analysis after 4 and 8 weeks of healing. In the experimental group, bone regeneration in defects on the tooth root mesial aspect occurred at 8 weeks, accompanied by the regeneration of periodontal tissues, such as cementum and periodontal ligaments. In contrast, delayed and immature healing was observed in the control group defects with no graft material. The findings here indicated that a three-dimensional, woven-fabric, composite scaffold combined with mesenchymal cells and platelet-rich plasma could accelerate the regeneration of alveolar bone and periodontal tissues.

Key words: mesenchymal stem cells, scaffold, platelet-rich plasma, bone regeneration, periodontal tissue regeneration