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""Liu SS-Y, Cruz-Marroquin E, Sun J, Stewart KT, Allen MR. Orthodontic mini-implant diameter does not affect in-situ linear microcrack generation in the mandible or the maxilla. Am J Orthod Dentofacial Orthop 2012;142:768-73. We recently discovered that the data in Figure?4 were miscalculated in our article. This miscalculation affects not only the presentation of Figure?4, but also several CYTH4 statements in the Results and Discussion. These are summarized below. 1. There is no difference in the total microdamage burden generated in the maxilla vs the mandible. The corrected results lead to the same broad conclusions and clinical implications reported in the published article: that neither the diameter of the?mini-implant nor the site of insertion (mandible vs maxilla) had a significant effect on the amount of linear microdamage adjacent to the implant when?the implants were inserted after pilot drilling in situ. Fig 4.? Total linear microcrack burden in A, the maxilla and B, the mandible. The control represents regions of cortical bone without pilot drilling or mini-implant insertion; pilot drilling had no mini-implant inserted; 1.4-, 1.6-, and 2.0-mm mini-implants had pilot hole drilling plus click here mini-implant insertion. *P ISRIB clinical trial PhD degrees. Dr Perry mentored more than 360 residents at Northwestern University Dental School, served as chair of the Department of Orthodontics for 25 years, and earned professor emeritus status in?1992. By his actions and his words, everyone who came into contact with him knew he demanded excellence, but he would always lend a helping hand for those who wanted to improve,�� said Steven Marshall of Buffalo Grove, Illinois, a former student, teaching colleague, and practice associate. ��He was the consummate teacher. Once you had a relationship with him, it never faded. He would share his experience for your benefit without judgment or question. With the exception of Antarctica, Dr Perry lectured on every continent. He published extensively, was a member of 8 dental organizations, and served as chairman, consultant, editor, contributor, and organizer in 19 professional appointments. Among his many awards and honors, he was selected by the Northwestern University Dental School as one the 20 most outstanding faculty members in the 100-year history of the school.