The effect of repeated immersion of gypsum cast in sodium hypochlorite and glutaraldehyde on its physical properties: An in vitro study
Background: One method used to disinfect a dental cast is immersion in a disinfecting solution. Repeated immersion of a cast in disinfectant may affect its physical properties. Purpose: The purpose of this study was to evaluate the changes in dimensional accuracy and hardness of the dental casts as...
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2012-01-01
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| Series: | Journal of Pharmacy and Bioallied Sciences |
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| Online Access: | http://www.jpbsonline.org/article.asp?issn=0975-7406;year=2012;volume=4;issue=6;spage=353;epage=357;aulast=Kumar |
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| author | Rachuri Narendra Kumar Subash M Reddy Suma Karthigeyan Rachuri Punithavathy K S Karthik R Manikandan |
| author_facet | Rachuri Narendra Kumar Subash M Reddy Suma Karthigeyan Rachuri Punithavathy K S Karthik R Manikandan |
| author_sort | Rachuri Narendra Kumar |
| collection | DOAJ |
| description | Background: One method used to disinfect a dental cast is immersion in a disinfecting solution. Repeated immersion of a cast in disinfectant may affect its physical properties. Purpose: The purpose of this study was to evaluate the changes in dimensional accuracy and hardness of the dental casts as a result of repeated disinfection in 0.525% sodium hypochlorite and 2% glutaraldehyde solutions. Materials and Methods: Sixty specimens were made of type III dental stone. Twenty specimens were immersed in slurry, a supernatant solution of calcium sulfate in distilled water (control casts), 20 specimens in 0.525% sodium hypochlorite, and 20 specimens in 2% glutaraldehyde solutions for 30 min and air dried for 24 h. This process was repeated for 7 times for testing. Linear dimensional change and hardness were determined according to American National Standards Institute/American Dental Association (ANSI/ADA) standards. The data were analyzed using two-way analysis of variance. Results: For specimens prepared with type III stones, treatment was by immersion in slurry (group I - control casts), and by immersion in 0.525% sodium hypochlorite (group II - test group 1) and in 2% glutaraldehyde solution (group III - test group 2). The specimens treated with sodium hypochlorite and glutaraldehyde showed more linear dimensional change compared to the specimens treated in slurry. However, the difference between test casts and control casts was significant. But the difference between the two test groups was not significant. Both the test groups showed decrease in hardness of the specimens compared to that specimens in control group. But the difference between two test groups was not significant in hardness.However,the values remained close to ANSI/ADA standards. Conclusion: The results demonstrated that repeated immersion of type III dental stone specimens in slurry with distilled water, 0.525% sodium hypochlorite and 2% glutaraldehyde, along with drying in air, caused a significant increase in linear dimension and a significant decrease in hardness. |
| first_indexed | 2024-04-13T13:08:59Z |
| format | Article |
| id | doaj.art-e4729b8af46b4abeba5d965994763492 |
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| issn | 0975-7406 0976-4879 |
| language | English |
| last_indexed | 2024-04-13T13:08:59Z |
| publishDate | 2012-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
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| series | Journal of Pharmacy and Bioallied Sciences |
| spelling | doaj.art-e4729b8af46b4abeba5d9659947634922022-12-22T02:45:42ZengWolters Kluwer Medknow PublicationsJournal of Pharmacy and Bioallied Sciences0975-74060976-48792012-01-014635335710.4103/0975-7406.100270The effect of repeated immersion of gypsum cast in sodium hypochlorite and glutaraldehyde on its physical properties: An in vitro studyRachuri Narendra KumarSubash M ReddySuma KarthigeyanRachuri PunithavathyK S KarthikR ManikandanBackground: One method used to disinfect a dental cast is immersion in a disinfecting solution. Repeated immersion of a cast in disinfectant may affect its physical properties. Purpose: The purpose of this study was to evaluate the changes in dimensional accuracy and hardness of the dental casts as a result of repeated disinfection in 0.525% sodium hypochlorite and 2% glutaraldehyde solutions. Materials and Methods: Sixty specimens were made of type III dental stone. Twenty specimens were immersed in slurry, a supernatant solution of calcium sulfate in distilled water (control casts), 20 specimens in 0.525% sodium hypochlorite, and 20 specimens in 2% glutaraldehyde solutions for 30 min and air dried for 24 h. This process was repeated for 7 times for testing. Linear dimensional change and hardness were determined according to American National Standards Institute/American Dental Association (ANSI/ADA) standards. The data were analyzed using two-way analysis of variance. Results: For specimens prepared with type III stones, treatment was by immersion in slurry (group I - control casts), and by immersion in 0.525% sodium hypochlorite (group II - test group 1) and in 2% glutaraldehyde solution (group III - test group 2). The specimens treated with sodium hypochlorite and glutaraldehyde showed more linear dimensional change compared to the specimens treated in slurry. However, the difference between test casts and control casts was significant. But the difference between the two test groups was not significant. Both the test groups showed decrease in hardness of the specimens compared to that specimens in control group. But the difference between two test groups was not significant in hardness.However,the values remained close to ANSI/ADA standards. Conclusion: The results demonstrated that repeated immersion of type III dental stone specimens in slurry with distilled water, 0.525% sodium hypochlorite and 2% glutaraldehyde, along with drying in air, caused a significant increase in linear dimension and a significant decrease in hardness.http://www.jpbsonline.org/article.asp?issn=0975-7406;year=2012;volume=4;issue=6;spage=353;epage=357;aulast=KumarDisinfectanthardnesslinear dimensional changeslurry |
| spellingShingle | Rachuri Narendra Kumar Subash M Reddy Suma Karthigeyan Rachuri Punithavathy K S Karthik R Manikandan The effect of repeated immersion of gypsum cast in sodium hypochlorite and glutaraldehyde on its physical properties: An in vitro study Journal of Pharmacy and Bioallied Sciences Disinfectant hardness linear dimensional change slurry |
| title | The effect of repeated immersion of gypsum cast in sodium hypochlorite and glutaraldehyde on its physical properties: An in vitro study |
| title_full | The effect of repeated immersion of gypsum cast in sodium hypochlorite and glutaraldehyde on its physical properties: An in vitro study |
| title_fullStr | The effect of repeated immersion of gypsum cast in sodium hypochlorite and glutaraldehyde on its physical properties: An in vitro study |
| title_full_unstemmed | The effect of repeated immersion of gypsum cast in sodium hypochlorite and glutaraldehyde on its physical properties: An in vitro study |
| title_short | The effect of repeated immersion of gypsum cast in sodium hypochlorite and glutaraldehyde on its physical properties: An in vitro study |
| title_sort | effect of repeated immersion of gypsum cast in sodium hypochlorite and glutaraldehyde on its physical properties an in vitro study |
| topic | Disinfectant hardness linear dimensional change slurry |
| url | http://www.jpbsonline.org/article.asp?issn=0975-7406;year=2012;volume=4;issue=6;spage=353;epage=357;aulast=Kumar |
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