Comparative evaluation of bond strength of all-metal crowns with different luting agents after undergoing various modes of surface treatments: An in-vitro study (original) (raw)
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The Journal of Indian Prosthodontic Society, 2011
Retention of fixed partial dentures is mostly dependent upon the bond between metal and cement as well as cement and tooth structure. However, most of the time clinical failure of bond has been observed at metal and cement interface. The treatment of metal surface, prior to luting, plays a crucial role in bonding cement with the metal. This study is conducted to evaluate and compare the effect of different surface preparations on the bond strength of resin-modified glass ionomer cement with nickel-chromium metal ceramic alloy. Fifty caries-free extracted molar teeth were made flat until the dentin of the occlusal surface was exposed. After fabrication of the wax patterns and subsequent castings, the castings were subjected to porcelain firing cycles. The nickel-chromium metal ceramic alloy discs were also divided into five groups and subjected to various surface treatments: (1) Unsandblasted (U), (2) sandblasted (S), (3) sandblasted and treated with 10% aqueous solution of KMnO4 (SK), (4) unsandblasted and roughened with diamond abrasive points (UD) and (5) unsandblasted and roughened with diamond abrasive points and treated with 10% aqueous solution of KMnO 4 (UDK). After surface treatments, the castings were cemented using Fuji PLUS encapsulated resin-modified glass ionomer cement. The obtained values of all the groups were subjected to statistical analysis for Tensile and Shear bond strength. Different surface treatments of the metal affects the bond strength values of resin-modified glass ionomer cement when used as luting agent.
Influence of curing mode of resin luting cements on bond strength to dentin
Brazilian Journal of Oral Sciences
Self-adhesive, dual-polymerizing resin cements require no treatment to the prepared tooth surfaces before cementation. Aim: The aim of this study was to evaluate the influence of curing mode on bond strength (BS) of three cementing systems to bovine dentin. Methods: The buccal enamel surfaces of 50 bovine incisors were removed to expose dentin and to flat the surface. The teeth were divided into five groups (n=10), which consisted of two resin cements (Multilink and Clearfil SA Cement) that were tested in dual- (halogen light for 40 s) and self-cured modes, and a control (RelyX ARC). Two cylinders of resin cements (1.0 mm X 0.75 mm) were prepared on each bonded dentin surface. After 24h at 37oC, resin cylinders were subjected to micro-shear testing in a universal testing machine (4411/Instron - 0.5 mm/min). Data were statistically analyzed by two-way ANOVA, Tukey and Dunnett`s test (5%). Results: Multilink showed higher BS than those observed on Clearfil SA. Light-curing resulted in...
Journal of Dental Materials and Techniques, 2018
Statement of the Problem: For a successful clinical outcome, luting agents should have a high bond strength. Bond failure is still one of the main reasons of restoration failures. Purpose: The present study was designed to comparatively evaluate the retention of metallic copings using different resin luting cements. Materials and Method: In the present experimental study, 40 intact premolar teeth were included. The teeth were prepared to receive copings with a chamfer bur at high speed, cooled with an air/water spray. The occlusal surface was prepared flat, perpendicular to the long axis of the root at a standardized height of 4 mm from the gingival chamfer finish line with a 20 degree consistent taper of axial walls. The wax patterns were prepared and cast. Teeth with un-cemented casts were randomly divided into 4 groups based on the type of cement used. The tensile load required to dislodge the crowns was measured using Instron universal testing machine with a crosshead speed of 1...
Research & Reviews: Journal of Dental Sciences, 2018
The aim of this study was to evaluate the tensile bonding strengths of Fleck’s® zinc phosphate cement, Nexus™ RMGI (resin-modified glass ionomer) luting cement, and RelyX™ Ultimate adhesive resin cement on metallic crowns after thermocycling. Methods: Thirty extracted mandibular first molars with minimal caries and restoration were prepared to receive full metal crowns. The teeth were divided into 3 groups (n=10 each) based on the cement used. The cementation procedures were done following the manufacturers’ instructions for all the specimens, and the teeth were stored for 72 hours at room temperature. The prepared teeth with the cemented crowns were immersed in the thermocycling unit for 48 hours; then, the tensile bonding strength was measured using an Instron testing machine. A one-way analysis of variance was used to test for differences among the three groups at a P-value ≤ 0.05. Results: There was a significant difference (P=0.000) between the groups. The RelyX™ Ultimate cemen...
Effect of dentinal surface preparation on the bonding of self-adhesive luting cements
Journal of Adhesion Science and Technology
The purpose of the present study was to evaluate the bond strength and the interaction morphology of self-adhesive resin luting cements (SLCs) to dentin prepared with different methods. Four SLCs were used: RelyX U100®, RelyX U200®, Clearfil SA Luting®, and SmartCem2®. A flat dentin surface of 40 human molars was exposed and each tooth was sectioned in four tooth-quarters, which were distributed into four groups according to the SLC used to cement indirect resin composite restorations. The tooth-quarters of each group were then distributed in four subgroups according to the method used for dentin preparation: flat-ended cylindrical fine-grit diamond, flat-ended cylindrical median-grit diamond, flat-ended cylindrical plain-cut tungsten carbide, or abraded with #600-grit SiC paper (control). The restored toothquarters were sectioned to obtain beams (0.8 mm2) and submitted to the microtensile bond strength test (n = 10). The results were analyzed using two-way ANOVA/Tukey (α = 0.05). F...
Analysis of impact of desensitizing agents on the retention of crowns cemented with luting agents
International journal of health sciences
The present study was undertaken for assessing the impact of desensitizing agents on the retention of crowns cemented with luting agents. 40 freshly extracted mandibular molar teeth were selected. Two study groups were made: Group C: Control group-Glass ionomer cement; and Group G: Study group-GC Tooth Mousse desensitizer. Crowns were fabricated and were subjected under universal force testing machine. All the results were recorded in Microsoft excel sheet and were analyzed by SPSS software. Mean tensile bond strength of group C specimens was 49.1 Kg while mean tensile strength of Group 2 specimens was 47.1 Kg respectively. While comparing statistically, non-significant results were obtained. Application of desensitizing agents may be designated during fabrication of crowns as it will not affect the retentive ability of the luting cements.
Bond Strength of Resin Cements to Noble and Base Metal Alloys with Different Surface Treatments
2014
Objectives: The bond strength of resin cements to metal alloys depends on the type of the metal, conditioning methods and the adhesive resins used. The purpose of this study was to evaluate the bond strength of resin cements to base and noble metal alloys after sand blasting or application of silano-pen. Materials and Method: Cylinders of light cured Z 250 composite were cemented to "Degubond 4" (Au Pd) and "Verabond" (Ni Cr) alloys by either RelyX Unicem or Panavia F2, after sandblasting or treating the alloys with Silano-Pen. The shear bond strengths were evaluated. Data were analyzed by three-way ANOVA and t tests at a significance level of P<0.05. Results: When the alloys were treated by Silano-Pen, RelyX Unicem showed a higher bond strength for Degubond 4 (P=0.021) and Verabond (P< 0.001). No significant difference was observed in the bond strength of Panavia F2 to the alloys after either of surface treatments, Degubond 4 (P=0.291) and Verabond (P=0.89...