3Geng Q.Influence of various impression procedures forremovable partial denture on displacement of soft mucosaltissue okubyo[J].Gakkai Zasshi,1993,60(1):35-53.
4Chou TM.Photoelastic analysis and force-trans mission characteristics with clasp distal-extension movable partial dentures[J].J Prosthet Dent,1989,62(3):311.
