Objective: The aim of this study was to compare between the
incidence of orthodontically induced root resorption (OIRR) of
maxillary first molar during canine retraction utilizing
conventional sliding mechanics and mini-implants assisted
mechanics. Methods: The sample in this study consisted of 20
subjects, which were randomly and equally divided into two
groups: group A; Conventional sliding mechanics group consisted
of 10 subjects (7 males and 3 females) and group B; Mini-implant assisted mechanics group consisted of 10 subjects (5 males and 5 females). CBCT were taken before treatment and after canine retraction to evaluate the degree of OIRR. Paired t-test and ANOVA were used to compare the extent of OIRR in both groups and between the mesiobuccal, distobuccal, and palatal roots within each group pretreatment and post-retraction. Results: Displayed a statistically significant increase in OIRR of maxillary first molar with conventional sliding mechanics (P-value <0.001) and mesiobuccal root exhibited the highest degree of OIRR and the palatal root had the lowest OIRR within both groups. Conclusion: Mini-implant assisted mechanics during canine retraction decreases the amount of OIRR in the maxillary first molars thanimplementing conventional sliding mechanics.