Background and Aim: Certain recently developed universaladhesives contain a silane coupling agent, which wouldeliminate the need for the clinician to apply additional silanewhen bonding brackets to ceramic surfaces. The aim of thisin vitro study was to compare the shear bond strength (SBS)of orthodontic brackets that were bonded with a universaladhesive against a control group that had brackets bonded witha separate silane on two different types of ceramic material.Materials and Methods: Thirty hybrid and thirty feldspathicceramic specimens were prepared. All samples were acid etchedwith hydrofluoric acid. In group 1, a silane and an adhesive primer(Transbond XT, 3M Unitek) were applied, and metal bracketswere bonded to the hybrid ceramic surfaces using adhesivepaste resin. In group 2, a universal adhesive (Clearfil UniversalBond, Kuraray) was applied, and brackets were bonded with thesame adhesive paste. In groups 3 and 4, the same protocolswere applied to feldspathic ceramic surfaces as were applied tothe hybrid surfaces in groups 1 and 2, respectively. A two-wayanalysis of variance (ANOVA) was used to compare the groups.Results: The mean SBS values were 10.7 ± 3.1 MPa for group1, 11.6 ± 4.1 MPa for group 2, 5.7 ± 1.8 MPa for group 3, and 9.3± 3.4 MPa for group 4. There were also significant differencesbetween the ARI scores of the groups.Conclusion: Universal bonding showed adequate SBS valuesfor clinical use during orthodontic bonding on ceramic surfaces