Disinfection of dental gypsum model with 0.5% sodium hypochlorite: Effect on dimensional stability

Syed Murtaza Raza Kazmi, Zahid Iqbal, Nazia Yazdanie

Research output: Contribution to journalArticlepeer-review


Objective: To evaluate and compare the effect different techniques of disinfection of irreversible hydrocolloid and type III dental gypsum, with 0.5% NaOCl, on their (linear) dimensional stability. Study design: Quasi Experimental study. Setting: Department of Metallurgy, Pakistan Council for Scientific and Industrial Research (PCSIR) Lahore. Duration with dates: Six months, from June 1, 2006 to November 30, 2006. Subjects and methods: Ninety (90) casts were made from Irreversible Hydrocolloid Impression by non-probability purposive sampling technique. Measurements of the casts at three specific points were carried out using measurement guiding template through screw gauge and were recorded. Results: In this study Sodium Hypochloride 0.5% was used as disinfectant material for type III dental gypsum. Disinfection of type III dental gypsum, by Sodium Hypochloride 0.5% had no negative effect on their linear dimensional stability. Conclusion: Disinfection of Dental Gypsum type-III either by immersion and incorporation is easy and dimensionally stable.

Original languageEnglish
Pages (from-to)378-382
Number of pages5
JournalPakistan Journal of Medical and Health Sciences
Issue number2
Publication statusPublished - Apr 2011
Externally publishedYes


  • Cross infection
  • Disinfection
  • Immersion
  • Incorporation
  • Sodium Hypochlorite


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