Journal of Iranian Dental Association
J Iran Dent Assoc
Medical Sciences
http://jida.ir
23
journal23
2383-3041
10.52547/jida
en
jalali
1393
1
1
gregorian
2014
4
1
26
2
online
1
fulltext
en
The Effect of Addition of Calcium Hypochlorite Disinfectant on Setting Expansion and Surface Hardness of Dental Stone
Oral and Maxillofacial Radiology
Oral and Maxillofacial Radiology
Original
Original
<p><strong>Background and Aim:</strong> 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.</p>
<p><strong>Materials and Methods:</strong> 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.</p>
<p><strong>Results:</strong> 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.</p>
<p><strong>Conclusion:</strong> 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.</p>
<p></p>
Calcium Hypochlorite , Calcium Sulfate , Disinfectants , Hardness
102
106
http://jida.ir/browse.php?a_code=A-10-1-817&slc_lang=en&sid=1
Mahmood
Sabouhi
2300319475328460019739
2300319475328460019739
No
Member of Torabinejad Dental Research Center and Assistant Professor, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences. Isfahan, Iran
Niloofar
Khodaeian
khodaeian@dnt.mui.ac.ir
2300319475328460019740
2300319475328460019740
Yes
Member of Dental Materials Research Center and Assistant Professor, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences. Isfahan, Iran
Ebrahim
Ataei
2300319475328460019741
2300319475328460019741
No
Assistant Professor, Department of Restorative Dentistry, School of Dentistry, Shahid Sadoughi University of Medical Sciences. Yazd, Iran
Farhad
Kiani
2300319475328460019742
2300319475328460019742
No
Dentist