To evaluate the dimensional accuracy and hardness of gypsum cast on repeated immersion in sodium hypochlorite and peroxygenic acid: An in-vitro study

Talluri, Susmitha; AD, Manoj Kumar; K, Suhas Rao

doi:10.22271/oral.2022.v8.i2i.1562

Cited by 1 publication

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“…This study's results are consistent with those of another [26] that found that the mean hardness of gypsum specimens disinfected with sodium hypochlorite and glutaraldehyde by the immersion technique was lower than that of slurry (control). We found results that agreed with those of Talluri et al [27], despite their use of a different disinfectant solution, and with those of Moslehifard et al [28], despite their use of a different measuring method, both of whom found that the surface hardness of dental stones decreased after spraying them with the disinfectants under study. Finally, our results were also in agreement with those of Moslehifard et al [28] and Vandewalle et al [29], who found that stone casts immersed in 0.525% sodium hypochlorite showed a reduction in hardness compared to stone casts in slurry and 1% peroxygenic acid.…”

Section: Surface Hardnesssupporting

confidence: 91%

The Effect of Hypochlorous Acid Disinfectant on the Reproduction of Details and Surface Hardness of Type III Dental Stone

Zaid¹,

SM²

2022

Cureus

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IntroductionGypsum products have been used for many years in dentistry. They are used to make casts that are used in different dental laboratory procedures. It is considered a source of contamination because it comes in contact with blood and saliva that are found on dental impressions. Because it is difficult to make sure that every impression brought to the dental laboratory has been cleaned and because cleaning impressions is a complicated process that can lead to problems because of the way impression materials are made, cleaning the cast has become a key part of preventing infections. For this study, we used two ways (immersion and spray) to apply a hypochlorous acid (HOCl) disinfectant solution to type III dental stone to see how they affected the stone's surface hardness and its ability to show surface details accurately. Materials and methodsA total of 100 samples of type III dental stone, 50 samples for each test, which include the reproduction of detail test and surface hardness test, were prepared and randomly divided into five groups, 10 samples for each test group, which include group A (control), group B (immersion in 200 ppm HOCl disinfectant for five minutes), group C (spraying with 200 ppm HOCl disinfectant for five minutes), group D (immersion in 0.6% sodium hypochlorite (NaOCl) disinfectant for five minutes), and group E (spraying with 0.6% NaOCl disinfectant for five minutes). ResultsThe results showed that all the samples had met the reproduction of detail test requirement after disinfection with HOCl, while a significant reduction in the surface hardness of type III stone samples was also shown. ConclusionThe less undesirable effects of HOCl disinfectant solution on the surface hardness of type III dental stone when compared to sodium hypochlorite, as well as the absence of adverse effects on detail reproduction, made the HOCl disinfectant solution a good choice for dentists and dental laboratory personnel for cast disinfection and contamination control.

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Section: Surface Hardnesssupporting

confidence: 91%