Die Stone Disinfection: Incorporation of Sodium Hypochlorite |
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| Authors: | Lawrence G. Breault DMD MS James R. Paul DDS Steven O. Hondrum DDS MS Loren C. Christensen DDS |
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| Affiliation: | Lieutenant Colonel, Chief, Periodontics, Main Dental Clinic, Schofield Barrack, US Army Dental Activity, Hawaii, Diplomat, the American Board of Periodontology, Fellow, Academy of General Dentistry, member, American Academy of Periodontology, member American Dental Association.;Major, Chief, Prosthodontics, Ottawa Health Care Center, Ottawa, Ontario, Canada.;Colonel, Chief, Dental Material Laboratory, Area Dental Laboratory, Ft. Gordon, GA. Diplomate, Federal Services Board of General Dentistry, Fellow, Academy of Dental Materials, Fellow, American Association of Hospital Dentists, member, American Dental Association.;Colonel, US Army Reserve Command Dental Surgeon. Diplomate, the American Board of Prosthodontics, Fellow, the American Board of Prosthodontists, Former Director of the Advanced Education Program in Prosthodontics, Ft. Meade, MD. |
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| Abstract: | ![]()
Purpose Previous research has shown that dental gypsum casts may be effectively disinfected by the substitution of 10% of the gauging water with 5.25% solution of sodium hypochlorite. The purpose of this investigation was to determine the properties of gypsum produced from such a solution as opposed to tap water alone. Materials and Methods Tests included setting time, compressive strength, rigidity, diametral tensile strength, setting expansion, hardness, and detail reproduction. Results The addition of sodium hypochlorite to the gauging water resulted in a statistically significant increase in the compressive strength and rigidity, and a decrease in setting time (p .5). All other properties remained unchanged. Conclusions This substitution may be an effective and convenient method of disinfecting gypsum casts in the laboratory without adversely effecting physical and mechanical properties. |
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| Keywords: | dental die stone disinfection sodium hypochlorite physical properties |
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