Objectives: The objective of the study is to evaluate and compare the shear bond strength (SBS) of two orthodontic bonding materials – Transbond XT and Enlight-cured under standardized light intensity and exposure conditions. Material and Methods: A split-mouth in vivo study was conducted on 60 patients undergoing fixed orthodontic treatment. Maxillary first premolars – Tooth #14 (right) and Tooth #24 (left) – scheduled for extraction were selected. In Group 1, brackets were bonded using Transbond XT (3M) on Tooth #14, while in Group 2, Enlight (Ormco) was used on Tooth #24. After 24 h, brackets were debonded using a modified debonding plier and a digital force gauge, and the SBS was recorded. Results: Transbond XT demonstrated a slightly higher mean SBS (9.875 ± 0.786 MPa) compared to Enlight (9.648 ± 0.811 MPa). The difference was 2.29% and statistically significant ( P < 0.001), though it was not significant across subgroups based on age or gender. Conclusion: Both bonding agents produced clinically acceptable SBS values. While Transbond XT exhibited marginally superior bond strength overall, the clinical difference between the two materials was minimal.
Mathur et al. (Thu,) studied this question.
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