Effect of Rinsing Alginate Impressions Using Acidic Electrolyzed Water on Dimensional Change and Deformation of Stone Models

Hiraguchi, Hisako; Nakagawa, Hisami; Uchida, Hirobumi; Tanabe, Natsuko

doi:10.4012/dmj.22.494

Cited by 12 publications

(11 citation statements)

References 8 publications

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“…Alginate and silicone rubber impressions should be disinfected by immersing in 1000 mg/L chlorine-containing disinfectants for 15-30 minutes before they are cast or sent to the factories. 43,44 Digital oral scanning. Patients who need clear aligner orthodontic treatment and other customized appliances can obtain digital dental models through oral scanning.…”

Section: Infection Controls During Orthodontic Proceduresmentioning

confidence: 99%

Control of SARS-CoV-2 transmission in orthodontic practice

Guo

Yan

Wang

et al. 2020

American Journal of Orthodontics and Dentofacial Orthopedics

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The coronavirus disease 2019 (COVID-19) caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has attracted worldwide concerns because of its high person-to-person infectivity and lethality, and it was labeled as a pandemic as the rapid increase in the number of confirmed patients in most areas around the world became evident. The SARS-CoV-2 is mainly transmitted through respiratory droplets and close contact. There is also evidence of transmission through aerosols and digestive tracts. Because orthodontic treatment involves a large population who need routine return-visits, it was significantly affected and suspended because of the COVID-19 pandemic and the shutdown of the dental clinics and hospitals. Although the spread of COVID-19 has been effectively controlled in China, and many areas have gradually resumed work and classes, orthodontic participants are still under high risks of SARS-CoV-2 infection. This is due to the fact that the asymptomatic carriers of SARS-CoV-2 or patients in the incubation period may cause the cross-infection between orthodontic practitioners and patients. The close proximity between the practitioners and the patients, and the generation of droplets and aerosols that contain saliva and blood during treatment further increase the risks of transmission. In this article, we summarized the preventive strategies for control of SARS-CoV-2 transmission to protect both staff and patients during the orthodontic practice.

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Section: Infection Controls During Orthodontic Proceduresmentioning

confidence: 99%

Control of SARS-CoV-2 transmission in orthodontic practice

Guo

Yan

Wang

et al. 2020

American Journal of Orthodontics and Dentofacial Orthopedics

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“…In recent years different tests have been developed for analyzing this property. [4][5][6]36,42,[50][51][52][53][54] The most common one consists of taking the impression from a master cast (usually made of acrylic or stainless steel) and measuring the discrepancy between the latter and the obtained cast. Although the measurement of a single die can be performed with greater accuracy, 6 the distance between various dies is an important variable that should be considered in order to perform the test in clinically relevant conditions.…”

Section: Introductionmentioning

confidence: 99%

Effect of Storage Time on the Accuracy of Casts Made from Different Irreversible Hydrocolloids

Sedda

Casarotto²,

Raustia³

et al. 2008

The Journal of Contemporary Dental Practice

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Aim: Several new irreversible hydrocolloid formulations have recently become available with claims of an improved dimensional stability by the manufacturers. The aim of this study was to evaluate the accuracy of casts made from alginate impression materials poured immediately and after specific storage periods. Methods and Materials:Five alginates were tested: CA 37 (Cavex); Jeltrate (Dentsply Caulk); Jeltrate Plus (Dentsply Latin America); Hydrogum 5 (Zhermack); and Alginoplast (Heraeus Kulzer). A master model was mounted on a special device and used to obtain the impressions. These impressions were stored at 23°C and 100% relative humidity, then poured with gypsum immediately, and again after 24, 72 and 120 hours. The casts were measured and the data were analyzed by one way analysis of variance (ANOVA) and Tukey test at p<0.05. Results:The dimensional stability of the alginate impressions was both material and time dependent (p<0.05). After 24 hours of storage, only Alginoplast and Hydrogum 5 comply with the master model (p>0.05). After 72 and 120 hours, only Hydrogum 5 was dimensionally stable (p>0.05). Conclusion:The dimensional stability of the alginate impressions is influenced by the selected material and the storage time. Abstract © Seer PublishingClinical Significance: Alginate impressions should generally be poured immediately. However, some new types of alginate may have the pouring delayed. Citation: Sedda M, Casarotto A, Raustia A, Borracchini A. Effect of Storage Time on the Accuracy of Casts Made from Different Irreversible Hydrocolloids. J Contemp Dent Pract 2008 May; (9)4:059-066.

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“…According to the authors, the additives minimize the variances caused by the different types of water in setting time and in setting expansion. Hiraguchi et al 14 (2003) investigated the effect of rinsing alginate impression using acidic electrolyzed water for mold disinfection, on the dimensional change of gypsum models. There were no statistically significant differences in dimensional change of gypsum models obtained by alginate molds rinsing with tap water and acidic electrolyzed water, for the same rinsing time.…”

Section: Discussionmentioning

confidence: 99%

Influence of different water types on the physical and mechanical properties of gypsum

Proença¹,

Suzuki²,

Costa³

et al. 2015

Braz. J. Oral Sci.

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Aim: To evaluate if gypsum mixed with different water types, with their different compositions influence the dimensional change, surface roughness and compressive strength of type IV and V gypsum specimens. Methods: Sixty specimens were fabricated from metal matrices and divided into six groups (n=10) according to the used type of gypsum and water: G1, G2 and G3 -type IV gypsum and tap, mineral and distilled water, respectively; G4, G5 and G6 -type V gypsum and tap, mineral and distilled water, respectively. Water/powder ratio followed the manufacturer's recommendations (19 mL/100 g) in all groups. The same specimens were used for all tests. A micrometer dial evaluated the dimensional change. The surface roughness of three random points was determined with a rugosimeter; a universal testing machine performed the compressive strength test. The data were subjected to analysis of variance (ANOVA). Results: There was no statistically significant difference (p>0.05) between the three types of water in the studied variables. There was statistically significant difference (p<0.05) between the gypsum mixes for the dimensional change variable. Conclusions: The different water types, with their different compositions, did not influence the analyzed physical and mechanical properties.

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Effect of Rinsing Alginate Impressions Using Acidic Electrolyzed Water on Dimensional Change and Deformation of Stone Models

Cited by 12 publications

References 8 publications

Control of SARS-CoV-2 transmission in orthodontic practice

Control of SARS-CoV-2 transmission in orthodontic practice

Effect of Storage Time on the Accuracy of Casts Made from Different Irreversible Hydrocolloids

Influence of different water types on the physical and mechanical properties of gypsum

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