Influence of acrylic resin stages and of the space propitiator technique on vertical dimension of occlusion in total dentures Changes in vertical dimension of occlusion in maxillary complete dentures were evaluated after modifying Onda Cryl acrylic resin insertion stages (sandy or stringy) in specifics flasks or employing or not a space propitiator technique. Forty maxillary wax total dentures were made and randomly assigned in four groups, each one with 10 elements. They were all mounted in a semi-adjustable articulator and the initial vertical dimension measurements were recorded by the means of a gauging device attached to the articulator's guideline. The 4 groups were: Group S (Stringy stage, no use of space propitiator technique), Group SP (Stringy stage associated with the space Propitiator technique), Group Sn (Sandy stage, no use of space propitiator technique) and Group SnP (Sandy stage associated with the space Propitiator technique). All specimens were processed in a domestic microwave oven according to Onda cryl manufacturer's instructions. After the curing cycle, the flask was removed from the oven, remaining on the bench until its full cooling and the remounted standardized dentures were replaced in the articulator were reevaluated. The vertical dimensional alterations values were submitted to statistical analysis. Space propitiator technique was effective on reducing the vertical dimension alterations and changing the resin stage (sandy instead stringy stage) results in minor alterations on vertical dimension, although not statiscally significant.
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