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An in vitro comparative study of microleakage with self-adhasive flowable composite resin and traditional flowable composite

دراسة مخبرية مقارنة لتقييم التسرب الحفافي للراتنج المركب السيال ذاتي الإلصاق و الراتنج المركب السيال التقليدي

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 Publication date 2017
and research's language is العربية
 Created by Shamra Editor




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Regarding the sealing ability of restorative dental materials, this study was done to assess the microleakage of class V cavities restored with a new self-adhesive flowable composite resin and compare to different flowable materials.



References used
Leinfelder, K.F., Posterior composite resins: the materials and their clinical performance. The Journal of the American Dental Association, 1995. 126(5): p. 663667671675- 664668672676
Lutz, F., The postamalgam age. Operative dentistry, 1995. 20(6 :)p. 218-222
De Munck, J.d., et al., A critical review of the durability of adhesion to tooth tissue: methods and results. Journal of dental research, 2005. 84(2): p. 118-132
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Aim: to compare the effect of multiple usage and surface coarseness of diamond burs on marginal microleakage of cervical resin composite restorations. Materials and methods: sixty extracted premolars without caries were chosen. The sample was rand omly divided into three groups: n1=n2=n3=20. Group(1): class v cavities were prepared using super coarse diamond burs, group(2): prepared by coarse diamond burs, whereas group)3(: prepared by medium coarse diamond burs. All cavities were restored by resin composite, then The teeth were thermocycled and immersedIn5%solution of methylene blue dye for 12hours.Then the teeth were sectioned vertically, Dye penetration was evaluated using a 10X stereomicroscope at the occlusal and gingival margins. Data were collected and statistical analysis was conducted. Results: The results showed that the multiple use of super coarse diamond burs caused no significantly statistically affect on occlusal and gingival microleakage (P>0.05). However, the multiple use of coarse and medium diamond burs caused significantly statistically affect on gingival marginal microleakage (P<0.05).
Introduction :The demand for posterior aesthetic restorations has dramatically increased in recent years. Several new materials have been developed with improved aesthetic, adhesive and mechanical properties. Theoretically, nano-structured dental resin omposites are purported to have increased wear and hardness resistance compared with hybrid composites and may favor the achievement of restoratives with better long-term performance. Aim: The wear resistance of different types of resin composites were evaluated in the in vitro study. Material and methods :Two nanohybrid restorative composites -Tetric®EvoCeram (Ivoclar-Vivadent) and CeramXTM(Dentsply) - were compared with a microhybrid material - Tetric®Ceram (Ivoclar-Vivadent) and hybrid material Spectrom (Dentsply) . wear resistance : fifteen specimens (3x3 mm) of each material were subjected to wear tests . The data were analyzed by 1-way ANOVA(<=0.5). Results : The Tetric®EvoCeram composite resin exhibited significantly less wear than the CeramX and Tetric®Ceram material . Conclusions :In terms of wear resistance, nano-structured composites may perform either similarly or comparatively better than a microfilled and hyprid composite . nanohybrid restorative composites can thus be considered as a good restorative material.
Resin based composite considers substantially as a restorative material in clinic. Dentists concern in placement resin composite restorations with Long term survival. Materials and Methods: 20 Non carious human third molars, class I cavity was pr epared in every molar, restored with methacrylate resin composite Tetric EvoCeram. The restored teeth were subjected to thermocycles. Specimen was randomly divided into two groups : the first group 10 restorations, were repaired by Cojet® (3M ESPE, Germany) and restored by Filtek™ P90, the second group 10 restorations also repaired by Cojet ® but restored by Filtek™ Z350 XT. After that all teeth were subjected to thermocycles again, later immersed in 0.5% basic fuchsin solution for 1 s. The teeth were transversely sectioned and observed under a stereomicroscope. The degree of dye penetration was recorded and analyzed. Results: No statistically significant differences in microleakage were observed between two groups either with low shrinkage Silorane resin composite or methacrylate resin composite
The aim : This study aims to evaluate and compare the microleakage between nano and hybrid composite. Materials and Methods : the sample consisted of forty extracted premolars for orthodontics purposes , class v cavities were prepared with a speci fic dimensions on the buccal surface. The sample divided into two groups ; group A restored by nanocomposite ( Z350) , group B restored by hybrid composite ( Z250) , after that, the samples were placed in the incubator with thermo cycling for a month ,The samples were then immersed in 0.5 % methelyne blue dye for 24 hours , each tooth was mesial-distal sectioned vertically , finally, of all samples was studied using stereomicroscope to evaluated the microleakage . Results : there was no statistical significant difference between the nano and hybrid composite according to microleakage.
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