Comparison of impression techniques and double pouring by dental cast’s accuracy

Brazilian Journal of Oral Sciences

Raphael Freitas de Souza¹  Aion ManginoMessias²  Stephania Caroline RodolfoSilva²  José Maurício dos Santos NunesReis²  Filipe de OliveiraAbi-Rached² 

[1] McGill University;Sao Paulo State University;

关键词: Dental impression materials;    Dental impression technique;    Photography, dental;    Dimensionalmeasurementaccuracy.;   

DOI  :  10.20396/bjos.v18i0.8657273

来源: DOAJ

【 摘 要 】

Aim: This study compared impression techniques and double pouring by means of cast’s accuracy. Methods: For each patient (n=10), impressions from right maxillary canine to first molar were made with acrylic resin trays and vinyl-polysiloxane using one single-step, and four two-steps techniques: relief with poly(vinyl chloride) film; tungsten-carbide bur/scalpel blade; small movements of the tray; non-relief. Total visible buccal surface area of crowns was measured three times using photographs from patients (Baseline) and casts. Mean area values (mm2) between Baseline and casts differences were analyzed by two-way repeated-measures ANOVA (α=.05; 1-β=85%). Results: No significant differences were observed for Impression Techniques (P=.525), Double Pouring (P=.281), and their interaction (P=.809). Conclusion: All impression techniques and double pouring produced casts with similar accuracy.

【 授权许可】

Unknown