Radiopacity of the modified Portland cement in comparison with MTA
Keywords:Dental cements, MTA, Portland cement, radiopacity
AbstractPurpose: This in vitro study used digital images to measure the radiopacity of the Portland cement (PC) containing or not radiopaque substances in relation to the radiopacity of the Mineral Trioxide Aggregate (MTA) cement. Methods: Three specimens were fabricated for each of the following five groups: 1) ProRoot MTA (Dentsply); 2) Portland cement – PC (Goiás); 3) PC + 2% uranyl acetate solution; 4) PC + 2% PTA solution; 5) PC + lead citrate solution. Specimens were stored in room temperature for 28 days and their radiopacity was measured by means of a direct digital radiography system (Sens-A-Ray), using the analytical functions line profile graph and histogram. Results: ProRoot MTA group showed the highest radiopacity; Portland cement radiopacity was approximately 60% of the MTA value. The tested solutions increased the radiopacity of Portland cement in the following rates: PTA=7%, uranyl acetate =12.5% and lead citrate =11%. Conclusion: The addition of radiopaque substances increased radiopacity of the original Portland cement, but it did not reach the level of ProRoot MTA radiopacity. Key words: Dental cements; MTA; Portland cement; radiopacity
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