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... analysis recorded leakage as present or absent as this may be more relevant to pulp damage than how much leakage occurs. A second and more detailed analysis was then carried out to record the amount of leakage (Figure 3). Both left and right sides were scored and added together; therefore generating an overall score be- tween 0 and 8 per tooth. ...
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... Furthermore, bonding agent's application to the dentine before applying the cement enables the formation of dentine bond before the polymerization shrinkage of the luting cement occurs. This may decrease the chance of the formation of gaps [22]. ...
Aims: The aim of this study was to evaluate the effect of different marginal cement space thickness and different luting agents on the microleakage of monolithic zirconia crown restorations. Materials and methods: forty-eight human first premolars were prepared to receive full anatomic crowns milled from KATANATM zirconia disc, divided into two main groups (n=24) based on different marginal cement space thickness; Group A-zero μm marginal cement space and Group B-25 μm marginal cement space. Each group was then subdivided into three subgroups (n=8) based on the luting agent used: (A1, B1) cemented with RelyX Ultimate adhesive cement, (A2, B2) cemented with RelyX U200 self-adhesive cement and (A3, B3) cemented with Riva Luting Plus Resin-modified glass ionomer cement. After cementation and thermocycling (500 cycles), the samples were then emersed in 2% methylene blue for 24h. Before sectioning the samples bucco-palatally each sample was embedded in clear epoxy resin. Microleakage was recorded using a digital microscope at 40X. The data was statistically analyzed using One-Way ANOVA and post hoc Bonferroni tests. Results: the result of this study showed that the marginal cement space thickness had a significant effect on microleakage (p ≤0.05). Furthermore, the type of luting agent had a significant effect, with RelyX ultimate luting agent showing the least microleakage. Conclusion: increasing the marginal cement space thickness to 25 μm reduced the amount of microleakage of zirconia crown restorations. RelyX Ultimate adhesive resin cement showed the lowest amount of microleakage when compared to the other types of luting cements.
... Using two different core build-up materials causes micro leakage, gapping and no proper bonding between the luting and the core material. 9,10 Financial or other competing interests: None. Disclosure forms provided by the authors are available with the full text of this article at jemds.com. ...
A tooth can be broken due to many reasons, out of which deep cervical caries can be the one leading to destruction of the whole buccal surface of the tooth. So, to preserve such kind of tooth, root canal treatment is the ultimate treatment option followed by proper selection of the restorative means of such endodontically treated tooth. endodontically treated tooth (ETT) has loss of tooth structure and changes in physical characteristics. Therefore, proper selection of restoration for ETT is mandatory to maintain almost the same level of strength and regaining its functional abilities. The decision of doing restoration of endodontically treated teeth depends on many factors like the amount of tooth structure remaining, condition of the opposing tooth, etc. In cases of less than 50 % tooth structure remaining post and core followed by crown is the best treatment option. This article showcases a case report of treatment of anterior teeth with deep cervical caries. The posts used in these cases were fiber post which were luted and the core build up was done with ParaCore, which is a glassreinforced composite by Coltene. Deep cervical caries can lead to destruction of the whole buccal surface of the tooth. So, to preserve such kind of tooth, root canal treatment followed by proper selection of restoration for endodontically treated tooth is mandatory to maintain almost the same level of strength and to regain its functional abilities. This article showcases a case report of treatment of anterior teeth with deep cervical caries.
A BSTRACT
Objective
To compare the micro-leakages of fiber post luted and core buildup performed with ParaCore (Coltene) and LuxaCore (DMG) resin cement.
Materials and Methods
Thirty-six single-rooted teeth were selected and treated with root canal treatment and fiber post cementation with two types of resin cement (LuxaCore and ParaCore). Samples were exposed to 500 cycles of thermocycling, immersed in 2% methylene dye and centrifuged and sectioned longitudinally, and checked under a stereomicroscope.
Results
LuxaCore and ParaCore showed a mean of 0.39250 mm and 0.47500 mm micro-leakage, respectively.
Conclusion
There was a statistically non-significant difference seen with group 3 (LuxaCore) versus group 4 (ParaCore) ( P > 0.05).
