Abstract
BackgroundThe aim of this study was to evaluate the discoloration induced by CEM cement, Portland cement (PC) and MTA mixed with propylene glycol (MTA-PG) in comparison to White MTA.Material and MethodsNinety extracted premolar and canine teeth were resected 2 mm below the CEJ. The coronal part of crown was prepared with peeso reamer and Gates-Glidden drills, and the specimens were randomly divided into 4 experimental (n=20) and one control (n=10) groups. The tooth crowns in experimental groups 1 to 4 were filled with White MTA, PC, CEM cement and MTA-PG, respectively; and in group 5, the teeth were kept empty. After incubation, digital photographs of teeth were acquired at 4 time points (before, immediately after placing the materials, 3 and 6 months afterwards). Images were transferred to Adobe Photoshop CS4 and CIE L*a*b color space was used for tooth shade assessment. One-Way ANOVA and One-Sample t-test were used to compare discoloration of teeth between groups.ResultsSignificant statistical discoloration was only observed in the cervical one third of all groups at each time points (except between 3 and 6 months). Tooth discoloration was greatest in PC and lower in MTA and MTA-PG at the end of 6 months. The tooth discoloration between immediately and 3 months after placing the materials had significant difference only between MTA and PC; and also the tooth discoloration between immediately and 6 months after placing the materials was observed only between PC and MTA, and PC and MTA-PG.ConclusionsAll of the experimental biomaterials caused tooth discoloration after 6 months, of those, PC had the most and MTA and MTA-PG had the least discoloration effect. Key words:Mineral trioxide aggregate (MTA). Calcium enriched mixture (CEM). Propylene glycol. Portland cement.
Highlights
Since the introduction of Mineral trioxide aggregate (MTA) as a retro-filling material by Torabinejad [1] in 1995, MTA has been widely used in different clinical situations due to numerous favourable properties such as high biocompatibility and low cytotoxicity [2], sealing ability [3], release of calcium hydroxide (Ca(OH)2)(4), antibacterial effect [5], reasonable compressive strength, and acceptable hardness [5,6]
According to the results of post-hoc Tukey test, the color change between before and after material placement was only significant between MTA-propylene glycol (PG) and Portland cement (PC) groups (P=0.002)
The color change between T2 and T3 was only significant between MTA and PC groups (P=0.017)
Summary
Since the introduction of Mineral trioxide aggregate (MTA) as a retro-filling material by Torabinejad [1] in 1995, MTA has been widely used in different clinical situations due to numerous favourable properties such as high biocompatibility and low cytotoxicity [2], sealing ability [3], release of calcium hydroxide (Ca(OH)2)(4), antibacterial effect [5], reasonable compressive strength, and acceptable hardness [5,6] Despite these advantages, MTA has shown some drawbacks such as long setting time, difficult handling, and tooth color change [6,7,8]. Since no studies have compared the tooth color change due to application of CEM, PC and MTA-PG, the aim of this study was to evaluate the discoloration induced by these biomaterials in comparison to White MTA. Conclusions: All of the experimental biomaterials caused tooth discoloration after 6 months, of those, PC had the most and MTA and MTA-PG had the least discoloration effect
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
