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:: Volume 26, Issue 2 (4-2014) ::
J Iran Dent Assoc 2014, 26(2): 102-106 Back to browse issues page
The Effect of Addition of Calcium Hypochlorite Disinfectant on Setting Expansion and Surface Hardness of Dental Stone
Mahmood Sabouhi1 , Niloofar Khodaeian * 2, Ebrahim Ataei3 , Farhad Kiani4
1- Member of Torabinejad Dental Research Center and Assistant Professor, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences. Isfahan, Iran
2- Member of Dental Materials Research Center and Assistant Professor, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences. Isfahan, Iran , khodaeian@dnt.mui.ac.ir
3- Assistant Professor, Department of Restorative Dentistry, School of Dentistry, Shahid Sadoughi University of Medical Sciences. Yazd, Iran
4- Dentist
Abstract:   (4329 Views)

Background and Aim: Addition of disinfectants to dental stones is one method to pre-vent cross-contamination between patients and laboratory personnel. This study aimed to evaluate the effect of addition of calcium hypochlorite disinfectant on setting expansion and surface hardness of dental stone.

Materials and Methods: In this experimental study, calcium hypochlorite aqueous solu-tion with 0.5% concentration was added to type V dental stone. Setting expansion was measured by extensometer in millimeter and surface hardness was measured by Rockwell hardness test machine. Data were statistically analyzed using t-test with 0.05 level of significance.

Results: The mean setting expansion values were 2.49±0.0017 mm and 0.27±0.0094 mm in the test and control groups, respectively and had a statistically significant difference. The mean Rockwell hardness number was 74±1.93 and 85±3.09 in the test and control groups, respectively with no statistically significant difference.

Conclusion: Setting expansion and surface hardness of type V dental stone increased and decreased, respectively by the addition of 0.5% calcium hypochlorite. Thus, this disinfection method needs modification for routine use in the laboratory setting.
Keywords: Calcium Hypochlorite, Calcium Sulfate, Disinfectants, Hardness
Full-Text [PDF 431 kb]   (1548 Downloads)    
Type of Study: Original | Subject: Oral and Maxillofacial Radiology
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Sabouhi M, Khodaeian N, Ataei E, Kiani F. The Effect of Addition of Calcium Hypochlorite Disinfectant on Setting Expansion and Surface Hardness of Dental Stone. J Iran Dent Assoc 2014; 26 (2) :102-106
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Volume 26, Issue 2 (4-2014) Back to browse issues page
Journal of Iranian Dental Association

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