A comparison of three dimensional change in maxillary complete dentures between conventional heat polymerizing and microwave polymerizing techniques

Three dimensional changes in maxillary complete dentures immersed in water for seven days after polymerization

“…Dimensional change was measured using a threecoordinate measuring machine (Tristation, TST 600-FC, Nikon Corp., Tokyo, Japan) graduated to an accuracy of 0.5 µm or less at 20° C with a ball stylus measuring 0.5 mm in diameter. 5 The measurements were performed on denture specimens after deflasking and immersion for seven days in water.…”

“…Denture specimens were prepared according to the method used in our previous study. 5 To fabricate the To fabricate the working cast, a die of an edentulous maxillary arch (402U, Nisshin, Kyoto, Japan) was duplicated using silicone elastomer (GC, Tokyo, Japan). A master cast was made of dental stone (New Fujirock, GC, Tokyo, Japan) according to the manufacturer's recommendation.…”

“…In the clinic, the storage of polished dentures in water before they are supplied to the patient would be at most around one week. In our previous study, 5 we used a three-coordinate measuring machine to measure various distortions of denture specimens fabricated using two different polymerization processes. The aim of the present study was to measure and compare three dimensional changes in the fitting surface and artificial teeth of maxillary complete dentures fabricated with two different polymerization processes after immersion in water for seven days.…”