title: [Clinical analysis of laser welding on porcelain bonded metal surface].
abstract: OBJECTIVE
  To evaluate the clinical effect of laser-welded crowns and bridges.
  
  
  METHODS
  Two hundred defective crowns and bridges were welded by using Heraplus laser welding machine, and then restored by porcelain.
  
  
  RESULTS
  After being welded ,those defective crowns and bridges of different materials fit well and their marginal areas were also satisfactory. During the follow up period of one year, no fractured porcelain and crack were found at welding spots.
  
  
  CONCLUSIONS
  The technology of laser welding has no direct effect on welding spots between metal and porcelain and could be used to deal with the usual problems of the crowns and bridges.
authors: Shanghai Stomatological Disease Center, Shanghai 200031, China. wjw505@126.com
authors: Jia-wei
authors: JW
authors: Weng
authors: Wen-an
authors: WA
authors: Dai
authors: Xue-ying
authors: XY
authors: Wu
mesh_terms: D003442:Crowns; D003776:Dental Porcelain; D012994:Dental Soldering; D006801:Humans; D007834:Lasers; D008670:Metals; D014896:Welding
chemical_list: D008670:Metals; D003776:Dental Porcelain