Table 3: Mean tensile bond strength (MPa), standard deviation and failure types in the zirconia ceramic groups.

Groups Bond Strength Means (MPa) and Standard Deviations Failure Types
Group 2 – Silane + Scotchbond Universal 27.55 a (±6.99) - 13 cohesive in composite resin cone
- 2 mixed*
Group 4 – Z Prime Plus 23.71 a (±5.65) - 11 cohesive in composite resin cone
- 4 mixed*
Group 1 – Scotchbond Universal 22.64 a (±5.67) - 6 cohesive in composite resin cone
- 9 mixed
Group 5 – MZ Primer 13.64 b (±5.49) - 12 mixed*
- 2 cohesive in composite resin cone
- 1 adhesive
Group 3 – Signum Zirconia Bond 7.54 c (±4.75) - 15 adhesive

Medians followed by different letters in the columns differ significantly according to Tukey’s test at a significance level of 5%. *Mixed failure: adhesive and cohesive in the composite resin cone.

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