Effects of surface treatments on shear bond strengths between a resin cement and an alumina core

J Prosthet Dent. 2000 Jun;83(6):644-7.

Abstract

Statement of problem: Although bonding to all-ceramic restorations is desirable, there is little information on the use of resin cements containing a phosphate monomer, and the importance of different surface treatments on their adhesion to high-strength core materials.

Purpose: This study attempted to determine the shear bond strength values between Panavia 21 resin cement (Kuraray) and an alumina core material (In-Ceram) after 3 surface treatments and the application of a silane coupling agent.

Material and methods: Forty-five In-Ceram cylindrical rods were fabricated and assigned to 3 groups. Group I specimens were treated with a 9.5% hydrofluoric (HF) acid, group II with a 5% HF acid, and group III were sandblasted. All specimens were coated with a silane coupling agent (Cavex Clearfil Photobond and Activator) before cementation with Panavia 21 to sandblasted nickel-chromium rods. As a control, group IV consisted of 8 porcelain (Vitadur Alpha) rods treated with a 5% HF acid and silane. All specimens were subjected to a load of 1.2 kg during cementation, then stored under water for 36 hours. A jig mounted on a Hounsfield Universal Testing machine was used at a crosshead speed of 0.5 mm/min to test the shear bond strengths.

Results: The results were 14.65 +/- 4.64 MPa for group I, 18.03 +/- 6.13 MPa for group II, and 22.35 +/- 5.98 MPa for group III In-Ceram specimens; and 18.05 +/- 8.46 MPa for control (group IV).

Conclusion: The use of Panavia 21 resin cement and a silane coupling agent can achieve a successful bond between either sandblasted or 5% HF acid-etched In-Ceram core material.

MeSH terms

  • Aluminum Oxide / chemistry*
  • Analysis of Variance
  • Chromium Alloys / chemistry
  • Dental Bonding* / statistics & numerical data
  • Dental Porcelain / chemistry*
  • Humans
  • In Vitro Techniques
  • Materials Testing / instrumentation
  • Materials Testing / methods
  • Materials Testing / statistics & numerical data
  • Phosphates / chemistry*
  • Post and Core Technique
  • Resin Cements / chemistry*
  • Silanes / chemistry
  • Surface Properties
  • Tensile Strength

Substances

  • Chromium Alloys
  • Panavia TPN-S
  • Phosphates
  • Resin Cements
  • Silanes
  • Dental Porcelain
  • In-Ceram
  • Aluminum Oxide