Direct measurement of dimensional accuracy with three denture-processing techniques.
The Michigan Computer-Graphics Coordinate Measurement System (MCGCMS) was used to determine the dimensional accuracy of dentures processed by three different techniques: conventional heat compression, microwave, and visible-light activation. Standardized dentures were fabricated from casts made in an RTV silicone mold. All casts were duplicated with hydrocolloid and 42 dentures were made (ie, 14 dentures for each technique). The MCGCMS measured 22 points on two frontal planes to compare master casts to dentures. The results showed no significant difference in overall dimensional accuracy. At specific sites, however, the visible-light-activated technique produced significantly more flange distortion than did either the conventional or microwave techniques.
Turck
M D
MD
Naval Dental School, Bethesda, Maryland.
Lang
B R
BR
Wilcox
D E
DE
Meiers
J C
JC
D000180:Acrylic Resins / Q000737:chemistry*; D000704:Analysis of Variance; D003196:Computer Graphics; D003819:Denture Bases / Q000592:standards*; D003824:Denture, Complete / Q000592:standards*; D005069:Evaluation Studies as Topic; D006358:Hot Temperature; D008027:Light; D008872:Microwaves; D015203:Reproducibility of Results
D000180:Acrylic Resins