Aim: The aim of this study was to investigate the adhesive efficiency of preheated nanohybrid composite in bonding orthodontic brackets compared to Transbond XT and flowable composite. Material and Methods: Forty-five orthodontically extracted premolars were randomly divided into 3 groups. For group I, Transbond XT was the adhesive of choice, for group II; flowable composite, while for group III preheated nanohybrid composite was used. All the samples were exposed to thermocycling for 1000 cycles and then the shear bond strength and the adhesive remnant index (ARI) were determined for each group. Results: There was a statistically significant difference between group 1 and the other two groups (p<0.001). There was no statistically significant difference between group 2 and group 3 (p=0.896). ARI scores 2 and 3 showed the highest frequency in all groups. Conclusion: Despite having a clinically acceptable bond strength, the short manipulation time of the preheated nanohybrid composite presented a limitation for its use and might have affected its bond strength. Transbond XT showed the highest bond strength while flowable composite displayed the lowest bond strength.