Effect of Thermo-mechanical Load Cycling on Microleakage in Class II Ormocer Restorations

Erdilek, Dina; Dörter, Can; Koray, Fatma; Kunzelmann, Karl‐Heinz; Efes, Begüm Güray; Gömeç, Yavuz

doi:10.1055/s-0039-1697432

Cited by 18 publications

(18 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 23 ] However, it must be noted that different study protocols such as teeth storage, number of cycles in thermocycling, and different periods in different dye solutions may affect the results of microleakage studies. [ 21 22 23 24 25 26 ]…”

Section: Discussionmentioning

confidence: 99%

Comparative evaluation of microleakage of nano-filled resin-modified glass ionomer: An in vitro study

et al. 2014

View full text Add to dashboard Cite

Objective:This in vitro study evaluated the microleakage of a nano-filled resin-modified glass ionomer and a high viscosity glass-ionomer restorations in class V cavities.Materials and Methods:Thirty-two class V cavities prepared on the buccal and lingual surfaces of 16 sound, third molar teeth were randomly assigned into two groups and restored by one of the glass ionomer material; Group A: A high viscosity (Ketac Molar, 3M ESPE) Group B: A nano-filled resin-modified (Ketac N100, 3M ESPE) glass ionomer. One clinician prepared all the cavities. The materials were used according to the manufacturers’ recommendations. The restored teeth were then stored in distilled water at 37°C for 24 h, thermocycled at 5-55°C for 1000 cycles. The specimens were immersed in aqueous solution of Indian ink dye for 48 h at room temperature. They were embedded in resin polyester and sectioned longitudinally in a buccolingual direction. Microleakage was assessed according to the depth of dye penetration along the restoration. The extent of dye penetration at the occlusal and gingival margins was assessed using a stereo microscope. Randomly selected samples from each group were prepared for scanning electron microscope evaluation. The data were statistically analyzed with Friedman and Wilcoxon signed ranks tests.Results:There were statistically significant differences between the microleakage scores of the two groups for both occlusal and gingival scores (P = 0.001). Occlusal and gingival scores for high viscosity glass ionomer (P = 0.024) and nanoionomer (P = 0.021) using Wilcoxon signed ranks tests showed statistically significant differences. High viscosity glass ionomer showed significantly less microleakage compared to the nano-filled resin-modified glass-ionomer (RMGIs) at occlusal margin (P = 0.001). No significant differences were found between the groups at gingival margin (P = 0.0317).Conclusion:Within the limitations of this in vitro study, nano-filled RMGIs restorations did not perform better than high viscosity glass ionomer in class V cavities in terms of microleakage assessment.

show abstract

Section: Discussionmentioning

confidence: 99%

Comparative evaluation of microleakage of nano-filled resin-modified glass ionomer: An in vitro study

et al. 2014

View full text Add to dashboard Cite

show abstract

“…However, teeth are continuously subjected to stresses during mastication, swallowing, and parafunctional habits. Weakly bonded tooth-material interfaces are more prone to suffer from the effects of oral environment in the short and long term (Erdilek et al, 2009). Among the different dental hard tissues, durable bonds to dentin are more difficult to achieve (Tay & Pashley, 2003).…”

Section: Introductionmentioning

confidence: 99%

Resistance to Degradation of Resin-Dentin Bonds Produced by One-Step Self-Etch Adhesives

et al. 2012

View full text Add to dashboard Cite

The objective of this article is to evaluate the resistance to degradation of resin-dentin bonds formed with three one-step adhesives. Flat, mid-coronal dentin surfaces were bonded with the self-etching adhesives [Tokuyama Bond Force (TBF), One Up Bond F Plus (OUB), and G-Bond (GB)]. The bonded teeth were subjected to fatigue loading, chemical degradation, and stored in distilled water for four time periods (up to 12 months). Specimens were tested for microtensile bond strength and microleakage. Fractographic analysis was performed by scanning electron microscopy. Bonded interfaces were examined by light microscopy using Masson's trichrome staining. An atomic force microscope was employed to analyze phase separation and surface nanoroughness (Ra) at the polymers. Vickers microhardness and the degree of the conversion (DC) were also determined. ANOVA and multiple comparisons tests were performed. Bond strength significantly decreased after the chemical challenge, but not after load cycling. Aging decreased bond strength after 6 months in TBF and GB, in OUB after 12 months. An increase of the nonresin protected collagen zone occurred in all groups, after storing. TBF showed the highest roughness, microhardness, and DC values, and GB showed the lowest. Mild self-etch one-step adhesives (TBF/OUB) showed a higher degree of cure, lower hydrophilicity, and major resistance to degradation of resin-dentin bonds when compared to highly acidic self-etching adhesive (GB).

show abstract

“…[7] When compared with nanocomposites and hybrid composites, ORMOCER has lower water solubility because of the presence of prepolymerized particles and lower monomer elution. [5192021] Nanocomposites showed significantly lesser microleakage than composites because of the presence of spherical nanofillers and their broad particle distribution enabling them to obtain high filler loading which decreases the volumetric shrinkage. Nanoparticles differ from composite filler particles in size and their chemistry of addition to the organic matrix, resulting in decreased polymerization shrinkage and less microleakage.…”

Section: Discussionmentioning

confidence: 99%

A comparative evaluation of microleakage among newer composite materials: An in vitro Study

Sudhapalli

Razdan

et al. 2018

Contemp Clin Dent

View full text Add to dashboard Cite

Background:Good adhesive bonding of restorative materials to cavity walls minimizing microleakage is an important criterion for the performance and longevity of a restoration in the oral cavity. The present study is aimed to compare the microleakage among newer composite materials.Materials and Methods:Forty-five extracted healthy premolars were collected; standard Class II cavities were prepared. They were randomly divided into three groups of 15 teeth each. The groups were made based on the different composite restorative materials used for restoration. Group A consisted of conventional microfilled composite resin restorations, and Group B was posterior nanocomposite resin. Group C was restored using ORMOCER – Admira. After completion of restorations, all teeth were subjected to thermocycling at 5° C, 37° C, and 55° C for 250 cycles. Later, all samples were immersed into 50% silver nitrate dye group wise for for 4 hours (h), and teeth were sectioned buccolingually. Sectioned teeth were observed under a stereomicroscope for the evaluation of microleakage. ANOVA and unpaired t-tests were used for statistical analysis. The significance level was at set P < 0.001.Results:The results of this study showed that Group C (ORMOCER – Admira) presented with the least microleakage followed by Group B (Tetric N-Ceram) followed by Group A (Tetric Ceram).Conclusions:Overall ORMOCER – Admira performed better than the other two composite materials with the least microleakage.

show abstract

Effect of Thermo-mechanical Load Cycling on Microleakage in Class II Ormocer Restorations

Cited by 18 publications

References 20 publications

Comparative evaluation of microleakage of nano-filled resin-modified glass ionomer: An in vitro study

Comparative evaluation of microleakage of nano-filled resin-modified glass ionomer: An in vitro study

Resistance to Degradation of Resin-Dentin Bonds Produced by One-Step Self-Etch Adhesives

A comparative evaluation of microleakage among newer composite materials: An in vitro Study

Contact Info

Product

Resources

About