2Jokstad A. Clinical trial of gingival retraction cords [J]. J ProsthetDent, 1999, 81(3): 258-261
3[1]Herbert T.Shilling B,etc.Fundamentals of fixed prosthodontics.Third Edition Quintessence Books,1997,132.
4[2]Mount GJ.Crowns and the gingival tissues.Aust Dent J,1970,15:253-258.
5[3]Egelberg J.The blood vessels of the dentogingival junction.J Periodont Res,1966,45:163-179.
6[4]David A,Kaiser,etc.Technique to disguise the metal margin of the metal/ceramic crown.Am J Dent,1988,1:217-221.
7[5]Asbjorn J.Clinical trial of gingival retraction cords.J Prosthet Dent,1999,81:258-261.
8[6]Baharav H,etc.The effect of displacement time on gingival crevice width.Int J Prosthodont,1997,10:248-253.
9[7]Arnold W.Continuing Dental Education:Coronal forms of the full crown restoration-their clinical applications.Quintessence Book,1981,44.
10Panikarovski VV, Grigor'ian AS, Abakarov SI, et al. Morphological changes in the periodontium from the use of different designs of metal ceramie dentures. Stomatologiia (Mosk), 1995,74(2):8-12.
