A Comparative Evaluation of Diamensional stability of irreversiblehydrocolloid impression materials –An invitro study
Journal Title: IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) - Year 2019, Vol 18, Issue 1
Abstract
Background The study conducted to determine diamentional stability of irreversible hydrocolloid impression materials stored at different time interval.Diamensional stability of irreverssible hydrocolloids is an important and thoroughly discussed topic. Many studies says that to prevent distortion, it is generally recommended that irreversible hydrocolloid impressions to be poured immediately or within a few minutes from removal from the mouthwithout wrapping in a wet paper towel. Aim The aim of this study was to determine dimensional stability of irreversible hydrocolloid impression materials. Methods In this studyIvorine teeth are modified on a model to allow measurements of tooth and arch width. And impressions were made and generated casts immediately and at additional times of 1/2hr dry,1/2hr wet,1hr wet,4hr wet.recorded tooth and arch widths on the casts and compared the measurements with those for the standard model. Results Traditional irreversible hydrocolloids were generally stable when poured immediately. However, stability decreased as time elapsed. New irreversible hydrocolloid substitutes appear to allow delay in pouring time and repouring of impressions without significant side effects. Conclusions:- Shorter storage time of irreversible hydrocolloid impressions before pouring is desirable, although this may not be necessary for the extended-pour types. The lack of a standardized technique for studying the effect of storage condition, makes it difficult to make clear recommendation.
Authors and Affiliations
Dr. Smita Khalikar, Dr. Swati pawar, Dr. S. P. Dange, Dr. Kishor Mahale
Keywords
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- EP ID EP434277
- DOI 10.9790/0853-1801065456.
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