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Article
The effect of addition of calcium hypochlorite disinfectant on some physical and mechanical properties of dental stone

Authors: Shorouq M. Abass شروق عباس --- Ibrahim K. Ibrahim
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: special issue 1 Pages: 36-43
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: The potentially damaging effects of the immersion technique, the difficulty in covering the entiresurface of the cast with the spray disinfecting solution, and the inability to assume that every impression presented tothe laboratory has been disinfected has led to the need for incorporating a disinfectant directly into the calciumsulfate hemihydrate. This study was designed to evaluate the effect of the addition of Calcium Hypochoritedisinfectant on some physical and mechanical properties of the dental stone.Materials and methods: Calcium Hypochlorite disinfectant in aqueous solution in different concentrations 0.5, 1.0, 1.5and 2.0% was added to type III dental stone. Setting time, setting expansion, reproduction of details, compatibilitywith impression materials and consistency are physical properties which were evaluated. The compressive strengthand surface hardness as mechanical properties were also determined.Results: The results of this study showed that the addition of 1 % of calcium hypochlorite improved some of thephysical and mechanical properties of dental stone (Setting Expansion, Compressive Strength and Surface Hardness)while its adversely affected the other properties (Setting Time)Conclusions: The 1 % of calcium hypochlorite disinfectant solution could be used to disinfect dental cast with theleast effect when compared with the other concentrations of calcium hypochlorite


Article
Influence of SOLO disinfectant on some properties of different denture lining materials

Authors: Shorouq M. Abass شروق عباس --- Reem A. Nassif ريم نصيف --- Bayan S. Khalaf بيان خلف
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 3 Pages: 36-41
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Denture lining materials are widely used in prosthodontic treatment and management of traumatizedoral mucosa. A contaminated prosthesis can provide a source of cross-contamination between patients and dentalpersonnel as well as a cause for denture stomatitis. Therefore, denture disinfection has been recommended as anessential procedure for maintenance of a healthy oral mucosa. This study investigated the effect of SOLOdisinfectant solution on some properties of different denture lining materials.Materials and methods: Three different solutions were used in this study; SOLO disinfectant solution, sodiumhypochlorite solution, and water on three types of acrylic denture lining materials; hot cure, cold cure, and softacrylic resin. Twenty seven disk-shaped samples were used to evaluate the color stability and forty five rectangularsamples were used for testing the surface micro hardness and surface roughness of the different denture liningmaterials. Data measurements of the color stability, surface hardness, and surface roughness were analyzed andcompared statistically.Results: The color stability for the tested denture lining materials was insignificantly affected (p>0.05) by the immersionin the SOLO disinfectant solution. There was a highly significant difference (p< 0.01) in the surface hardness of the hotcure while it was insignificant (p>0.05) for cold cure denture lining materials when immersed in the SOLO disinfectantsolution. For surface roughness there was no significant difference (p>0.05) by immersion in SOLO disinfectant solutionfor the different denture lining materials.Conclusions: Based on the results of this study SOLO disinfectant solution produced no adverse effect on the colorstability, surface hardness, and surface roughness of the hot cure, cold cure, and soft acrylic denture lining materials

Keywords

acrylic --- immersion --- SOLO --- color --- hardness --- roughness


Article
The effect of SOLO and sodium hypochlorite disinfectant on some properties of different types of dental stone

Authors: Aseel M. Al-khafaji اسيل الخفاجي --- Shorouq M. Abass شروق عباس --- Bayan S. Khalaf بيان خلف
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2013 Volume: 25 Issue: 2 Pages: 8-17
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Dental casts come into direct contact with impression materials and other items that are contaminatedby saliva and blood from a patient's mouth, leaving the casts susceptible to cross-contamination. The disinfectantsolutions of the impression materials cause various adverse reactions. Therefore, disinfection of dental casts may beeffective in preventing cross infection. This study was carried out to evaluate the surface hardness, dimensionalaccuracy, reproduction of details and surface porosity of type III, type IV and type IV extra hard dental stone afterimmersion in and spray by using SOLO and Sodium hypochlorite disinfectant solutions.Materials and methods: 240 Stone samples were prepared in rubber rings, A total of 60 test block were prepared foreach test (surface hardness, dimensional accuracy, reproduction of details and surface porosity).the samples weredivided into three groups (20 for each type of stone) type (III, IV, IV extra hard); SOLO and Sodium hypochloritedisinfectant by 2 methods (immersion and spray) were used in each test.Results: the results of dimensional accuracy, reproduction of details, surface hardness and surface porosity revealedno significant difference for all types of tested stone samples after immersion or spraying in SOLO and NaOCl exceptthe surface hardness of type IV extra hard showed significant difference after spray with SOLO and the surfaceporosity of type IV extra hard showed significant difference after immersed in both SOLO and NaOCl solutions.Conclusions: Based on the results of this study immersion in and spray by using SOLO and NaOCl disinfectant solutionsproduced no adverse effect on dimensional accuracy, reproduction of details, surface hardness and surfaceporosity for type III, type IV dental stone and for type IV extra hard dental stone except for the surface hardness fortype IV extra hard when sprayed with SOLO and the surface porosity when type IV extra hard stone immersed in theSOLO and NaOCl solutions

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