The Effect of Acid Etching Surface Treatment on the Shear Bond Strength between Resin Cement and Alumina In-ceram
Purpose: The purpose of this study was to evaluate the effect of surface treatment by hydrofluoric acid etching on the shear bond strength between resin cement and alumina Inceram.
Materials and Methods: Five alumina InCeram samples were used for each experimental group. Two positions of each sample were tested (n=10). The samples were assigned to six surface treatment conditions: group I; excess glass was not removed, group II; excess glass was not removed but etched with 4% hydrofluoric acid gel for 1 minute, group III; excess glass was removed by sandblast, group IV; excess glass was removed by sandblast and then etched with 4% hydrofluoric acid gel for 1 minute, group V; the samples were polished with sandpaper until alumina surface was exposed and group VI; the samples were polished with sandpaper until alumina surface was exposed and then etched with 4% hydrofluoric acid gel for 1 minute. All samples were cleaned with ultrasonic for 5 minutes and then silane was applied onto the cleaned surface. Each of the samples were then bonded at two positions with Rely X ARC resin cement. The shear bond strengths of each position were tested using the universal testing machine with cross head speed of 0.5 mm/min to measure the stress (MPa) which pushed the resin cement out of the ceramics. The means of bond strength were statistically analysed using one-way ANOVA and Tukey test.
Results: The mean shear bond strength was highest in the group polished with sandpaper until alumina surface was exposed, followed by the group which excess glass was removed by sandblast. Those shear bond strengths were significantly higher than that of the others (p< 0.05). The shear bond strength of the groups treated with 4% hydrofluoric acid treated with 4% hydrofluoric acid gel were gel were significantly lower than that of the untreated groups. (p< 0.05).
Conclusion: Surface treatment by hydrofluoric acid etching decreases the shear bond strength between resin cement and alumina Inceram.
1. Keneth JA. Dental ceramics. Phillip’s Science of Dental Material Vol. 11th Edition. 2003; 655-715.
2. Edris A, Jabr A, Cooley RL, Barghi N. SEM evaluation of etch patterns by three etchants on three porcelains. J Prosthet Dent J Prosthet Dent 1990; 64: 1990; 64: 734-739.
3. Özcan M, Vallittu PK. Effect of surface conditioning methods on the bond strength of luting cement to ceramics. Dent Mater Dent Mater 2003; 19: 725-731.
4. Özcan M. The use of chairside silica coating for different dental applications: a clinical report. J Prosthet Dent 2002; 87: 469-472.
5. Rosenblum MA, Schulman A. A review of allceramic restorations. J Am Dent Assoc 1997; 128: 297-307.
6. Seghi RR, Sorensen JA. Relative Flexural Strength of Six New Ceramic Materials. Int J Prosthodont 1995; 8: 239-246.
7. Probster L, Diehl J. Slip-casting alumina ceramics for crown and bridge restorations. Quintessence Int. 1992; 23: 25-31.
8. Pober RL, Glordara RA, Campbell SD, Pelletier LB. Compositional analysis of InCeram infusion glass. J Dent Res 1992; 71; 253.
9. Kim BK, Bae HEK, Shim JS, Lee KW. The influence of ceramic surface treatments on the tensile bond strength of composite resin to allceramic coping materials. J Prosthet Dent 2005; 94: 357-362.
10. Kern M, Thompson VP. Sandblasting and silica coating of a glass-infiltrated alumina ceramic: volume loss, morphology, and changes in the surface composition. J Prosthet Dent 1994; 71: 453-461.
11. Kern M, Thompson VP. Bonding to glass infiltrated alumina ceramic: Adhesive methods and their durability. J Prosthet Dent J Prosthet Dent 1995; 73: 1995; 73: 240-249.
12. Saracoglu A, Cura C, Cotert HS. Effect of various surface treatment methods on the bond strength of the heat-pressed ceramic samples. J Oral Rehabil 2004; 31: 790-797.
13. Borges GA, Sophr AM, Goes MF, Sobrinho LC, Daniel CN. Effect of etching and airborne particle abrasion on the microstructure of different dental ceramics. J Prosthet Dent 2003; 89: 479-488.
14. Madani M, Chu FC, McDonald AV, Smales RJ. Effects of surface treatments on shear bond strengths between a resin cement and an alumina core. J Prosthet Dent J Prosthet Dent 2000; 83: 644- 2000; 83: 644- 647.
15. Diego AA, Santos C, Landim KT, Elias CN. Characterization of Ceramic Powders Used in the InCeram Systems to Fixed Dental Prosthesis. Materials Research 2007; 10: 47-51.
16. Saygili G, Sahmali S. Effect of ceramic surface treatment on the shear bond strengths of two resin luting agents to all-ceramic materials. J Oral Rehabil 2003; 30: 758-764.
17. Kiyan VH, Saraceni CHC, Silveira BL, Aranha ACC, Eduardo CP. The influence of internal surface treatments on tensile bond strength for two ceramic systems. Oper Dent 2007; 32: 457-465.