title: [A comparative study of marginal microleakage using different cements in porcelain-fused-to-metal crown].
abstract: OBJECTIVE
  To evaluate the marginal microleakage of porcelain-fused-to-metal crown using four different cements.
  
  
  METHODS
  Sixteen porcelain-fused-to-metal crowns were built and randomly divided into 4 group, luted onto standard prepared human forward molars using four different cements (glass ionomer cement, resin-modified glass ionomer cement, PanaviaF, Super-Bond C&B adhesive luting system). After temperature cycling test, all the crowns were then submerged in 2% fuchsin for 24 h. The marginal microleakage at tooth cement interfaces was observed using light stereomicroscopy and evaluated in classification index. The marginal microleakage grade of 4 groups were analyzed by SPSS 13.0.
  
  
  RESULTS
  The PanaviaF demonstrated the least marginal microleakage, Super-Bond C&B adhesive luting system, resin-modified glass ionomer cement showed an intermediate level of marginal microleakage, glass ionomer cement was associated with severe marginal microleakage (total, Chi2 = 157.60, P < 0.01; among the different groups, P<0.05).
  
  
  CONCLUSIONS
  Adhesive resin luting system which is the first selection in clinical is better than glass ionomer cement and is good at porcelain-fused-to-metal crown.
authors: Dept. of Oral Medicine, Affiliated Dental Hospital of Liaoning Medical College, Jinzhou 121004, China.
authors: Ming-Xin
authors: MX
authors: Jiang
authors: Ke-Qiang
authors: KQ
authors: Huang
authors: Zhi-Gang
authors: ZG
authors: Li
authors: Xiu-Qiu
authors: XQ
authors: Gao
authors: Chun-Shan
authors: CS
authors: Li