The Effect of Different Techniques of Microwave Disinfectionon Elastomeric Impression Materials (Laboratory and Microbiological Study)
Journal Title: Journal of Medical Science And clinical Research - Year 2016, Vol 4, Issue 10
Abstract
Dental impressions are often contaminated by exposure to saliva and blood. Microwave irradiation and immersion in solutions have been recommended for denture disinfection. However, the effect on impression materials has not been studied enough. Accordingly, the question is, is it possible to apply "Microwave disinfection" to impression materials vinyl siloxanether, polyvinyl siloxane and polyether? And if yes is it better to use with or without hydrogen peroxide (H2O2)? The Aim of this study is to evaluate and compare the effect of different techniques of microwave disinfection (microwave for 1 minute, 3 minutes and microwave with H2O2 for 1 minute and 3 minutes) on elastomeric impression materials (laboratory and microbiological study). Martials and methods: Specimens were made with vinyl siloxanether (Group I), polyvinyl siloxane (Group II) and polyether (Group III). Experimental groups were divided into Subgroup I :No disinfection measures (control group) , Subgroup II: The disinfection of samples were carried using microwave 630 w immersed in saline for 1 minute, Subgroup III: The disinfection of samples were carried using microwave 630 w immersed in saline for 3 minutes, Subgroup IV: The disinfection of samples were carried using microwave 630 w immersed in hydrogen peroxide for 1 minute, Subgroup V:The disinfection of samples were carried using microwave 630 w immersed in hydrogen peroxide for 3 minutes. The disinfection effect on bacteria and physical properties of impressions were evaluated. Result; Different techniques were significantly different (P< .05) when compared with the control in reducing the number of colony forming units (CFU) per unit volume (mL) for both streptococcus mutans and candida albicans. The most significant reduction in the CFU/mL was noted when the disinfection of samples was carried using microwave 630 w with hydrogen peroxide for 3minutes. No statistically significant difference was noted between the control and treatment groups in terms of all the physical properties tested (P>.05). Conclusion; Microwave disinfection decreased the CFU/ml of microorganisms in dental impressions, but it is more effective when samples immersed in hydrogen peroxide. Microwave disinfection with or without hydrogen peroxide had no effect on physical properties of polyvinyl siloxanether and polyvinyl siloxane but cause dimensional changes for polyether.
Authors and Affiliations
Ahmed Abd El-Hamid
Keywords
Related Articles
- EP ID EP214586
- DOI -
- Views 45
- Downloads 0
A Prospective Study on Blood Requisition and Utilization Practice in a Tertiary Care Teaching Hospital
Introduction: Blood component transfusions form a vital role in the resuscitation and management of both medical and surgical patients. Treating doctors tend to over-order blood components in surplus of utilization. Poli...
Effect of Conventional Phototherapy on platelet count in full term and Preterm Neonates with Indirect Hyperbilirubinemia - A Prospective Cohort Study
Jaundice in newborn is quite common and in most of the cases benign in nature. Phototherapy (PT) is one of the most common noninvasive methods of treatment. There are few studies on effect of phototherapy on platelet cou...
Observation of Serum Electrolytes and Nutritional Status in Patients With Gastric Outlet Obstruction Both Pre and Post Operative Status
Gastric outlet obstruction which was previously known as pyloric stenosis is not a single entity ,it is the clinical and path physiological consequence of any disease process that produces a mechanical impediment to gast...
Ice Pack Application on the Level of Pain in Episiotomy Wound
True experimental design with Quantitative approach was used to assess the effectiveness of ice pack application on the level of pain in episiotomy wound among postnatal mothers reveals that the ice pack application was...
A Rare Case of Primary Retroperitoneal Schwannoma: A Case Report
Schwannomas are tumors which arise from Schwann sheath of nerves and are very rare in the retroperitoneal region. They are commonly seen in the head and neck location. We report a case of retroperitoneal schwannomain a 5...