Clinical investigation of three gingival retraction methods / 实用口腔医学杂志

270 patients underwent single crown prosthodontics were randomly divided into 3 groups(n =90)and received gingival retraction with single-cord,double-cord and gingival retraction paste respectively.The prosthesis quality of the 3 groups was not statistically significant (P =3.209).The patient satisfaction was more and the gingival retraction time of the paste group was shorter than those of the cord groups(P<0.05).