Clinical research of porcelain laminate veneers with digital smile design and aesthetic pre-evaluation tempo-rary technology in anterior teeth restoration
Objective To compare the clinical effect of porcerlain laminate veneers by digital smile design(DSD)and aesthetic pre-evaluation temporary(APT)technology with that by conventional method.Methods This study involved 43 patients(90 restorations)who visited 2nd Department of Prosthodontics,Stomatology Hospital of Shenyang from June 2020 to December 2021.Totally 43 patients were randomly divided into the research group(22 patients,46 restorations)and the control group(21 patients,44 restorations).Veneers in the research group were produced by DSD and APT tech-nology,while in the control group veneers were produced by conventional technology.Compare the completion time of each restoration between the two groups.Patients'satisfaction was analysed by visual analogue scale(VAS).The aesthet-ic effect of teeth and soft tissues was assessed according to the modified pink esthetic score/white esthetic score(PES/WES).Clinical effect of restorations was assessed accord-ing to the modified assessment criteria of the United States Public Health Service(USPHS).Results The completion time of each restoration in the research group[(26.36±5.69)min]was lower than that in the control group[(31.00±6.09)min],with significant differences(t=-2.581,P=0.014).The research group restoration achieved higher VAS than the control group in terms of shape,comfort degree and smile effect(P＜0.05),while there was no significant difference in the VAS of color between the two groups(P＞0.05).Before the restoration,there were no significant differences in any aspect of PES/WES between the 2 groups.Two weeks after the treatment,the research group achieved higher score than the control group in the aspect of tooth shape and contour according to WES,as while as gingival level and soft tissue contour according to PES(P＜0.05).There were no significant differences between two groups in other aspects(P＞0.05).According to the modified USPHS standard,the research group achieved superior effect in tooth sensitivity than the control group at two weeks after treat-ment(P＜0.05),while there were no significant differences between the two groups in the completeness,margin adapt-ability,color matching or gingival health(P＞0.05);at six months after treatment,there were no statistical differences be-tween the two groups in any assessment items(P＞0.05).Conclusion The porcerlain laminate veneers produced by DSD and APT technology for anterior teeth restoration can achieve excellent esthetic effect in teeth and soft tissues,which can lower completion time and tooth sensitivity after teeth preparation compared with conventional technology,and promote patients'satisfaction.
digital smile designaesthetic pre-evaluation temporaryporcerlain laminate veneeraesthetic prosthodontics
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