Journal of Oral Science Research ›› 2019, Vol. 35 ›› Issue (8): 752-756.DOI: 10.13701/j.cnki.kqyxyj.2019.08.008

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Effect of Fluoride-resistant Streptococcus Mutans on Adhesion of CAD/CAM Ceramics to Teeth

GUO Xinwei, ZHAO Hongyan, CHENG Boqun, QIAN Xin, ZHANG Zhimin*   

  1. School of Stomatology, Jilin University, Changchun 130021, China
  • Received:2019-01-02 Online:2019-08-28 Published:2019-08-22

Abstract: Objective: To investigate the effect of Streptococcus mutans and its fluoride-resistant strains on the bonding interface between three kinds of ceramics and enamel, dentin, and fluid resin. Methods: Fluoride-resistant strains of Streptococcus mutans were induced. And ceramic-enamel/dentin/fluid resin specimens were prepared. The specimens were immersed in Streptococcus mutans UA159, its fluoride-resistant strain, and BHI culture medium, respectively. The bonding interface was observed under stereomicroscope and electron microscope for 14 days. Results: (1) Ceramic-adhesive interface: the cracks between ceramic and adhesive dipped in UA159 were more than those dipped in fluoride-resistant strains; the cracks between resin-based ceramic Lava Ultimate and adhesive were the most; (2) adhesive-teeth interface: the cracks between adhesive and fluid resin were the least; UA159 and its fluoride-resistant strains had similar influence on the interface. Conclusion: Streptococcus mutans and its fluoride-resistant strains can destroy the interface of ceramic-adhesive-dental tissue, and the most destructive effect is happened in resin-based ceramics.

Key words: Fluoride-resistant Streptococcus mutans, Streptococcus mutans, CAD/CAM, interface destruction