Micro-osmosis of mineral trioxide aggregate as a cement for casting dowel pins
- VernacularTitle:金属桩钉MTA粘固后的抗微渗透效果
- Author:
Yi TANG
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2008;12(19):3799-3800
- CountryChina
- Language:Chinese
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Abstract:
BACKGROUND: Mineral trioxide aggregate (MTA) is a new inorganic trioxide polymer. Previous studies indicated that MTA as a root tip material had good edge closeness as compared to silver amalgam and vitreous enamel-cementum.OBJECTIVE: To study the effect of anti-micro-osmosis of metal dowel pins cemented by MTA.DESIGN: Comparative observational study.SETTING: Jingzhou Central Hospital of Hubei Province.MATERIALS: Thirty-two submaxilla first premolars which were pulled out by the orthodontic treatment in 2004 of the hospital were selected, of which teeth were intact, dental roots were stout, straight and unbroken. MTA was provided by Dentsply Co., USA; zinc phosphate cement by Shanghai Dentistry Material Station; glass ionomer cement by Shanghai Qingpu Dentistry Material Station; EB composite resin by the Fourth Military Medical University Oral Medical Hospital.METHODS: Having been filled by traditional technique, 32 fresh single-rooted permanent teeth were randomly divided into 4 groups and cemented in casting dowel pins separately with four cements-zinc phosphate cement, glass ionomer cement, EB composite resin and MTA groups with 8 in each group. And then the dye penetration method was used to test the micro-osmosis of these cements.MAIN OUTCOME MEASURES: Micro-osmosis of the four cements.RESULTS: MAT as a cement had the minimum micro-osmosis while zinc phosphate cement had the maximum osmosis. The depth of osmosis that ranked from minimum to maximum was MTA
