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Hard tissue formation after direct pulp capping with osteostatin and MTA in vivo

  • Ji-Hye Yoon (Department of Conservative Dentistry, School of Dentistry, Dental Science Research Institute, Chonnam National University) ;
  • Sung-Hyeon Choi (Department of Conservative Dentistry, School of Dentistry, Dental Science Research Institute, Chonnam National University) ;
  • Jeong-Tae Koh (Department of Pharmacology and Dental Therapeutics, School of Dentistry, Dental Science Research Institute, Chonnam National University) ;
  • Bin-Na Lee (Department of Conservative Dentistry, School of Dentistry, Dental Science Research Institute, Chonnam National University) ;
  • Hoon-Sang Chang (Department of Conservative Dentistry, School of Dentistry, Dental Science Research Institute, Chonnam National University) ;
  • In-Nam Hwang (Department of Conservative Dentistry, School of Dentistry, Dental Science Research Institute, Chonnam National University) ;
  • Won-Mann Oh (Department of Conservative Dentistry, School of Dentistry, Dental Science Research Institute, Chonnam National University) ;
  • Yun-Chan Hwang (Department of Conservative Dentistry, School of Dentistry, Dental Science Research Institute, Chonnam National University)
  • Received : 2020.06.25
  • Accepted : 2020.12.09
  • Published : 2021.05.31

Abstract

Objectives: In recent in vitro study, it was reported that osteostatin (OST) has an odontogenic effect and synergistic effect with mineral trioxide aggregate (MTA) in human dental pulp cells. Therefore, the aim of this study was to evaluate whether OST has a synergistic effect with MTA on hard tissue formation in vivo. Materials and Methods: Thirty-two maxillary molars of Spraque-Dawley rats were used in this study. An occlusal cavity was prepared and the exposed pulps were randomly divided into 3 groups: group 1 (control; ProRoot MTA), group 2 (OST 100 μM + ProRoot MTA), group 3 (OST 10 mM + ProRoot MTA). Exposed pulps were capped with each material and cavities were restored with resin modified glass ionomer. The animals were sacrificed after 4 weeks. All harvested teeth were scanned with micro-computed tomography (CT). The samples were prepared and hard tissue formation was evaluated histologically. For immunohistochemical analysis, the specimens were sectioned and incubated with primary antibodies against dentin sialoprotein (DSP). Results: In the micro-CT analysis, it is revealed that OST with ProRoot MTA groups showed more mineralized bridge than the control (p < 0.05). In the H&E staining, it is showed that more quantity of the mineralized dentin bridge was formed in the OST with ProRoot MTA group compared to the control (p < 0.05). In all groups, DSP was expressed in newly formed reparative dentin area. Conclusions: OST can be a supplementary pulp capping material when used with MTA to make synergistic effect in hard tissue formation.

Keywords

Acknowledgement

This study was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (Ministry of Science and ICT, MSIP) (No. 2016R1D1A1B03930816).

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