Comparative evaluation of the effect of electrolyzed oxidizing water on surface detail reproduction, dimensional stability and surface texture of poly vinyl siloxane impressions. How to cite this article: Mahalakshmi AS, Jeyapalan V, Mahadevan V, Krishnan CS, Azhagarasan NS, Ramakrishnan H. Glutaraldehyde immersion showed variation in the interabutment and cross arch distance for all materials studied. Results: An increase in the interabutment and cross arch distance and decrease in occluso-gingival height was seen in the casts obtained. ANOVA test and Bonferroni test was applied. The cross arch distance, inter-abutment distance and the occluso-gingival length of the studs was measured under traveling microscope and observations were recorded and compared. Impressions were made and disinfected after rinsing and drying and casts poured. A CAD/CAM manufactured stainless steel die simulating maxilla with four metal studs at canine and molar region was used. The stability after disinfection of commonly used alginate and addition silicone of native origin (Algin-Gum & Ad-Sil) was compared with similar impression materials from developed countries (Vignette and Aquasil) and results compared. Material and methods: Disinfectant systems used were glutaraldehyde, sodium hypochlorite and ultraviolet chamber. Objectives: It was to analyse and compare the effect of different disinfectant systems on the dimensional stability of commonly used irreversible hydrocolloid and addition silicone impression materials from developing countries as compared to materials from developed countries. Immersion alginate impression in sodium hypochlorite 0.5% for four minutes can be used to disinfect the impression of post hemimaxillectomy patients' because sodium hypochlorite 0.5% is effective to eliminate K. There was an effect of immersing post hemimaxillectomy patients' alginate impression in sodium hypochlorite 0.5% for two and four minutes on K. pneumoniae on MacConkey's agar after immersing post hemimaxillectomy patients' alginate impression in sodium hypochlorite 0.5% for four minutes. Study results showed there was no growth of K. pneumoniae were obtained from the swab on surface of the impression and cast, cultured on MacConkey's agar, then counting the number of colonies was conducted. Sixteen sample were divided into eight groups consisting of control group (two minutes), control group (four minutes), disinfection group (two minutes), disinfection group (four minutes) of the alginate impression obtained from four post hemimaxillectomy patients'. The purpose of this study is to determine the effect of immersion post hemimaxillectomy patients' alginate impression in sodium hypochlorite 0.5% on K. Post hemimaxillectomyrequires rehabilitation by fabricating obturator on gypsum cast. pneumoniae can easily penetrate into the oral cavity. Post hemimaxillectomy cause communication between the nasal cavity and nasopharynx antrum opens, pathogenic bacteria such as K. Pneumonia is a major problem in health that can lead to death which one of the cause is Klebsiella pneumoniae.
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