Kaplan-Meier analysis of failure of the initially installed orthodontic mini-implant (OMI) according to ANB group. Duration of survival was measured from OMI placement to the time of failure (complete) or to the last follow-up or completion of treatment (censored). Cumulative survivals for OMIs of Class I malocclusion (group 1, blue, P = .000; log-rank test) and Class II malocclusion (group 2, green, P = .037; log-rank test) were significantly longer than for Class III malocclusion (group 3, brown)