Die Stone Disinfection: Incorporation of Sodium Hypochlorite

Breault, Lawrence G.; Paul, James R.; Hondrum, Steven O.; Christensen, Loren C.

doi:10.1111/j.1532-849x.1998.tb00170.x

Cited by 17 publications

(27 citation statements)

References 17 publications

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“…In agreement with the study done by Abdelaziz et al, 20 Jonathan et al, and Breault et al, 11 the assumption is that the sodium ions from the hypochlorite interfere with the structure and strength of gypsum which contain calcium in its structure. At the same time, in the present study, CaOCl 2 incorporated into die stone showed the weakest fracture strength, i.e., the least in tensile strength when compared with both, specimens with distilled water and specimens with sodium hypochlorite.…”

supporting

confidence: 81%

“…One of the techniques involves incorporation of disinfectant into gauging water before addition of dental stone, which does not require extra laboratory time. [9][10][11][12] Although the various studies have been conducted to evaluate the physical properties of cast gypsum after incorporation of disinfectants, spraying method, and immersion method, none have compared the tensile strength after incorporation of sodium hypochlorite and calcium hypochlorite solution as disinfecting solutions. 13,14 Nevertheless, type IV gypsum product is one among the popularly used gypsum product; it has a brittle quality too.…”

Section: 5005/jp-journals-10024-2197mentioning

confidence: 99%

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Comparative Evaluation of Tensile Strength in Die Stone Incorporated with Sodium and Calcium Hypochlorite as Disinfectants: An in vitro Study

Pramodh

Naik

Mahesh

et al. 2017

The Journal of Contemporary Dental Practice

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Aim:The aim of this study was to evaluate the tensile strength of die stone incorporated with sodium and calcium hypochlorite as disinfectants. Materials and methods:Two commercially available type IV die stone (Kalrock: Kalabhai Karson Pvt., Ltd and Pearlstone: Asian Chemicals) and two commercially available disinfectant solutions (sodium hypochlorite and calcium hypochlorite: Beachem Laboratory Chemical Private Limited, Chennai and Leo Chem Private Limited, Bengaluru) were used in this study, and the tensile strength was measured using Lloyd's Universal Testing Machine. Results:The results show that incorporating the disinfecting solutions decreases the tensile strength of both products. The effect of decreasing tensile strength on type IV gypsum product is seen more in calcium hypochlorite when compared with sodium hypochlorite disinfecting solution, and the tensile strength of Kalrock specimens is higher than Pearlstone specimens after disinfecting with sodium hypochlorite and calcium hypochlorite solution. The statistical results also show significant results in all the groups when compared with the control group. Conclusion:The incorporation of sodium and calcium hypochlorite disinfecting solutions is not an encouraging method for both die materials as it reduces the tensile strength of type IV gypsum product. Tensile strength of Kalstone ® die material is superior than Pearlstone ® die material after mixing with sodium hypochlorite and calcium hypochlorite. Control and Prevention, disinfecting the whole cast without or minimal changes in physical and mechanical properties was the motto of the study. The tensile strength in type IV gypsum product plays a most important role in retrieval of cast from impression, especially in narrow tooth preparation. This study reveals that incorporating method of disinfecting solutions is not recommended as it reduces the tensile strength.

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supporting

confidence: 81%

Section: 5005/jp-journals-10024-2197mentioning

confidence: 99%

Comparative Evaluation of Tensile Strength in Die Stone Incorporated with Sodium and Calcium Hypochlorite as Disinfectants: An in vitro Study

Pramodh

Naik

Mahesh

et al. 2017

The Journal of Contemporary Dental Practice

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“…These findings were probably due to different solubility rates of hemihydrate that alters the crystal growth and the amount of outward thrust. The results of the present study disagree with those of Breault et al 22 and Abdelaziz et al, 14 who…”

contrasting

confidence: 56%

Effect of Incorporation of Disinfectants on Surface Hardness and Dimensional Accuracy of Die Stone: An in vitro Study

Bakshi¹,

Dang²

2017

International Journal of Prosthodontics and Restorative Dentistry

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Aim: To evaluate surface hardness and dimensional accuracy of type IV dental stone after incorporation of disinfectants. Materials and methods:A total of 100 specimens, 50 (40 mm × 10 mm) disk shaped and 50 frustum cone shaped, were fabricated from type IV dental stone after incorporation of various disinfectants, namely glutaraldehyde (2%), iodophor (1.76%), chlorhexidine (2%), and sodium hypochlorite (1%), for evaluation of surface hardness and dimensional accuracy. Surface hardness was tested after 1-and 24-hour time interval using Rockwell hardness testing machine. Dimensional accuracy was measured using traveling microscope. Data obtained were compiled and analyzed statistically by using analysis of variance and post hoc test. Results:Results showed significant decrease in surface hardness of samples incorporated with disinfectants at 1 hour as compared with control (distilled water). Surface hardness of all the samples increased with time and was almost equal to control group at 24-hour interval, with iodophor showing the maximum value in comparison with the other disinfectants used. When dimensional accuracy of all the groups was compared, iodophor and sodium hypochlorite were found to cause negative alterations. Conclusion:Within the limitations of this in vitro study, it was concluded that incorporation of disinfectants in die stone during mixing did not affect the hardness value at 24-hour interval. Dimensional accuracy was altered by iodophor and sodium hypochlorite, but remained unaffected by chlorhexidine and glutaraldehyde. Keywords

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“…A técnica de autodesinfecção do alginato utilizada neste experimento tem a vantagem específica de combater a contaminação dos microrganismos orais que podem ser incorporados no material de moldagem durante a sua geleificação 8,23 e, mesmo não sendo 100% eficaz no combate aos microrganismos, possibilita um molde com menor carga microbiana, facilitando os procedimentos posteriores de desinfecção. O uso da clorexidina com o objetivo de minimizar a carga microbiana aderida aos moldes de HI foi relatado em estudo do qual o bochecho com solução de clorexidina previamente à obtenção de moldes de HI demonstrou redução da sua contaminação, sendo a concentração de 0,2% mais eficaz quando comparada à de 0,12% 24 .…”

Section: Discussionunclassified

Precisão dimensional de moldes de hidrocoloide irreversível manipulado com solução de clorexidina

Moura

Verde²,

Silva³

et al. 2014

Rev. da Fac. de Odontologia, UPF

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IntroduçãoNa impossibilidade de uso do processo clássico de esterilização nos moldes da cavidade bucal, a desinfecção química com soluções desinfetantes vem sendo utilizada e discutida em relação aos materiais de moldagem. O hidrocoloide irreversível (alginato), por exemplo, apresenta limitações quanto ao processo de desinfecção por imersão do molde na solução desinfetante, considerando que a natureza hidrófila desse material exige um limite de tempo de contato com os líquidos desinfetantes 1,2 . No entanto, alguns estudos relatam que técnicas de imersão, spray 3 e nebulização de hipoclorito de sódio 4,5 mostraram-se métodos eficazes do ponto de vista microbiológico e da precisão dimensional.

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Die Stone Disinfection: Incorporation of Sodium Hypochlorite

Abstract: This substitution may be an effective and convenient method of disinfecting gypsum casts in the laboratory without adversely effecting physical and mechanical properties.

Cited by 17 publications

References 17 publications

Comparative Evaluation of Tensile Strength in Die Stone Incorporated with Sodium and Calcium Hypochlorite as Disinfectants: An in vitro Study

Comparative Evaluation of Tensile Strength in Die Stone Incorporated with Sodium and Calcium Hypochlorite as Disinfectants: An in vitro Study

Effect of Incorporation of Disinfectants on Surface Hardness and Dimensional Accuracy of Die Stone: An in vitro Study

Precisão dimensional de moldes de hidrocoloide irreversível manipulado com solução de clorexidina

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