Journal of Oral Science Research ›› 2019, Vol. 35 ›› Issue (9): 898-901.DOI: 10.13701/j.cnki.kqyxyj.2019.09.019

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In Vitro Drug Release of Dental Flow Resin Modified by Core-shell Shaped CHX/ACP Nanospheres

XU Zexian1,2, YANG Yanwei2,3, QIU Yinong2, LI Zhiqiang4, WANG Xuefeng1, WANG Rui1, ZHENG Xin4, LIU Bin1*   

  1. 1. School of Stomatology, Lanzhou University, Lanzhou 730050, China;
    2. The 940th Hospital of Joint Logistic Support Force of PLA, Lanzhou 730050, China;
    3. State Key Laboratory of Military Stomatology, School of Stomatology, The Air Force Military Medical University, Xi’an 710032, China;
    4. Key Lab of Stomatology of State Ethnic Affairs Commission,Key Lab of Oral Diseases of Gansu Province, School of Stomatology, Northwest Minzu University, Lanzhou 730030, China
  • Received:2019-01-25 Online:2019-09-28 Published:2019-09-25

Abstract: Objective: To investigate the in vitro drug release of dental flow resin (FiltekTM Z350XT Flow Resin) modified by chlorhexidine/amorphous calcium phosphate (CHX/ACP) nanospheres with core-shell structure. Methods: The core-shell CHX/ACP nanospheres was synthesized and characterized. Nanospheres were added to FiltekTM Z350XT flow resin in different mass percentages (1%, 5%, and 10%) as experimental group, but unmodified flow resin as control group. The sample leaching solutions were prepared and the releases of calcium, phosphorus, and CHX at different time points were measured. Results: Three groups of experimental resins continuously released calcium, phosphorus, and CHX in deionized water. The release amounts all significantly increased with the increase of the added proportion of nanospheres, and also increased with the prolongation of soaking time. The release rate decreased with time. The release of the control group was approximately zero and did not change with time. Conclusion: Flow resin with different proportions of core-shell CHX/ACP can continuously release calcium,phosphorus, and CHX slowly. The addition proportion of nanoparticles has a significant effect on drug release.

Key words: anospheres with core-shell structure, chlorhexidine, amorphous calcium phosphate, dental flow resin