China Journal of Oral and Maxillofacial Surgery ›› 2018, Vol. 16 ›› Issue (5): 397-401.doi: 10.19438/j.cjoms.2018.05.003

• Orginal Articles • Previous Articles     Next Articles

Experimental study of acellular and demineralized human tooth in repair of calvarial bone defect in rats

LIU Zong-lin1, GUO Ke2, WANG Wen-chao1, ZHANG Yao-sheng1, XU Wei-feng2, ZHANG Shan-yong2, LIU Xiu-ming2, JIN Jia-min2   

  1. 1.College of Stomatology, Weifang Medical University. Weifang 261053, Shandong Province;
    2.Department of Oral Surgery, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; Shanghai Key Laboratory of Stomatology. Shanghai 200011, China
  • Received:2018-06-08 Online:2018-09-20 Published:2018-11-06

Abstract: PURPOSE: To investigate the feasibility of acellular decalcified human teeth as bone scaffold materials and their ability to induce bone defect and osteogenesis in rats. METHODS: Twenty-four isolated human teeth were treated with decalcification and decellularization respectively. In experiment 1, 6 male SD rats aged 10-12 weeks were used to embed decalcified teeth and acellular and demineralized teeth under the skin of the abdomen of the rats. After 4 weeks, the rats were sacrificed and H-E staining was performed to observe the inflammatory reaction around the two materials. In experiment 2, 12 male SD rats of 10-12 weeks old were selected to prepare bilateral calvarial bone defects,the left side of the bone defect was implanted with decalcified and acellular teeth, while the right side of the bone defect without any material was used as a blank control. Six rats were randomly selected for 4 weeks and 8 weeks respectively to be sacrificed. Complete specimens were obtained and Micro- CT scan was performed to compare bone mass from the general morphology. Rats at 4 weeks were taken for H-E staining and immunohistochemistry to observe the peripheral inflammatory response and the extent of newly formed bone. SPSS 23.0 software package was used for ANOVA of repeated measurement. RESULTS: After 4 weeks, H-E staining showed that the inflammatory reaction between acellular and demineralized teeth and surrounding tissues was significantly less than that of decalcified teeth. Micro-CT scanning and quantitative analysis of 4 and 8 weeks of rat calvarial bone showed that the bone mass in the bone defect implanted with acellular and demineralized teeth was significantly higher than that in the blank control (P<0.05). The results of H-E staining of rats at 4 weeks showed that the inflammatory response around the acellular and demineralized teeth was similar to the blank control. Immunohistochemical results showed that the number of new osteoblasts around the acellular and demineralized teeth was significantly higher than that of the blank control. CONCLUSIONS: Decalcified and decellularized teeth are a kind of biological scaffold material with good biocompatibility,osteogenic induction ability and plasticity.

Key words: Calvarial bone defect, Demineralized bone matrix, Acellular bone extracellular matrix, Extracted human teeth, Rat

CLC Number: