Correlation of pressure and displacement during XXXX : An in  vitro study.

@entity2522 @entity31686 @entity11945
STATEMENT OF PROBLEM: Although numerous @entity2522 materials are available, information is limited regarding the pressures that can atraumatically produce sufficient @entity2522 for a successful impression. PURPOSE: The purpose of this in  vitro study was to measure pressure and the resulting movement of artificial gingiva during simulated @entity2522 . MATERIAL AND METHODS: An idealized tooth model was made from acrylic resin and @entity11945 to simulate the free gingiva, sulcus, and attachment. The pressure and displacement achieved by 3 materials ( @entity31686 , @entity31686 New, and KnitTrax Cord) were measured. A stereoscopic digital measuring microscope was used to quantify the space generated by the displacement material. A pressure gauge was used to measure the corresponding pressures. RESULTS: The injection of @entity31686 resulted in a displacement distance of 1.31 mm, @entity31686 New 1.07  mm, and KnitTrax Cord 0.85 mm, which are within acceptable clinical parameters. The correlation between pressure and gap showed that @entity31686 and @entity31686 New behaved similarly, while KnitTrax Cord was different. @entity31686 , @entity31686 New, and KnitTrax Cord all had maximum pressures that would be considered atraumatic to the epithelial attachment. CONCLUSIONS: An increase in pressure resulted in an increase in displacement for the 2 paste materials. However, contrary to expectation, displacement decreased as pressure increased for the cord material.
