title: [Effects of static magnetic field on the activity of superoxide dismutase of human gingival fibroblasts].
abstract: OBJECTIVE
  To investigate the effects of static magnetic fields (SMF) generated by the open-circuit and closed-circuit dental magnetic attachments on the enzymology of human gingival fibroblasts.
  
  
  METHODS
  In this study, a cellular SMF exposure system developed by our department of prosthetic dentistry was used to impose the static magnetic force on the cultured human gingival fibroblasts in vitro. The activity of superoxide dismutase in those fibroblasts of the test group and that of the control group were measured and compared.
  
  
  RESULTS
  No significant difference (P > 0.05) in superoxide dismutase activity was found between the groups when they were loaded with different intensity of magnetic fields or for different period of time.
  
  
  CONCLUSIONS
  Under the conditions in this experiment, the static magnetic fields of the open-circuit magnetic attachments, and those of the closed-circuit ones as well, have no biological effects on the superoxide dismutase of human gingival fibroblasts.
authors: Department of Prosthodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
authors: Jie-Fei
authors: JF
authors: Shen
authors: Li
authors: L
authors: Du
authors: Yong-Lie
authors: YL
authors: Chao
authors: Chun
authors: C
authors: Xu
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D002648:Child; D005347:Fibroblasts / Q000201:enzymology*; D005881:Gingiva / Q000166:cytology*; D006801:Humans; D008280:Magnetics; D013482:Superoxide Dismutase / Q000378:metabolism*; D013997:Time Factors; D055815:Young Adult
chemical_list: D013482:Superoxide Dismutase