Comparison between different surface treatment methods on shear bond strength of zirconia (in vitro study).

C Joukhadar,E Osman,M Rayyan,M Shrebaty

doi:10.4317/jced.56242

C Joukhadar, E Osman + Show 2 more

Open Access

https://doi.org/10.4317/jced.56242

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Abstract

BackgroundTo compare the effect of Er:YAG Laser and Air particle abrasion (APA) surface treatments on shear bond strength of Y-TZP to composite resin cuboids in the presence and absence of primer application and salivary contamination. Material and MethodsSeventy-two cuboidal shaped specimens 7x7x3 were prepared from Y-TZP using CADCAM, cleaned and sintered. Specimens were divided into 2 main groups (n=36) according to surface treatment method; Air particle abrasion (A) and laser (L). Each group was subdivided into 2 subgroups (N = 18) according to surface modification using primer; each subgroup was further divided into 2 subdivisions (N=9) according to the presence of salivary contamination; APC (Air particle abrasion, primer, contamination), AP (Air particle abrasion, primer), AC (Air particle abrasion, contamination), A (Air particle abrasion), LPC (Laser, primer, contamination), LP (Laser, primer), LC (Laser, contamination), L (Laser). Composite cuboids having dimensions of 6x6x3 were also fabricated using custom made plexi plates. Composite cuboids were cemented centrally to zirconia cuboids and light cured under 5 kg weight for 6 mins. Shear bond strength of specimens was measured utilizing universal testing machine at a crosshead speed of 0.5 mm/min. Failure loads were recorded in Newton. SBS was calculated according to equation: SBS (MPa) = load (N)/area(mm2). ResultsViewing shear bond strength between studied groups, group APNC (484.02±85.02) showed higher mean value compared to ANPNC (122.09±55.80), also LNPNC (120.87±65.10) showed higher mean value in comparison to LPNC (170.78±53.22). APNC (484.02±85.02) and APC (592.22±189.65) showed higher mean values than LPNC (170.78±53.22) and LPC (3227.66±108.28) in sequence. ConclusionsAPA showed higher SBS values than Er:YAG surface treatment. Primer showed better results than no primer coating. Artificial saliva contamination did not affect the SBS of zirconia compared with no contamination results. Key words:Shear bond strength, zirconia, air particle abrasion, Er:YAG laser, primer, contamination.

Highlights

Ceramics have received much praise and clinical success since their introduction, because of their ability to mimic color and translucency of natural teeth
Independent T-student tests were conducted to analyze differences in shear bond strength according to surface treatment method, primer coating, and saliva contamination
Zirconia is widely applied in the dental field due to its strength, esthetics and biocompatibility

Summary

Introduction

Ceramics have received much praise and clinical success since their introduction, because of their ability to mimic color and translucency of natural teeth. Independent T-student tests were conducted to analyze differences in shear bond strength according to surface treatment method, primer coating, and saliva contamination. Results Effect of saliva contamination on SBS values (MPa) according to primer coating and surface treatment: According to independent T student test results, SBS values of air particle abrasion group APC showed highest SBS mean value (592.22), followed by APNC (484.0), ANPC (273.50) and ANPNC showed lowest mean value (122.09).

Results

Conclusion