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- W3128393340 abstract "We read the article reporting osseous evidence behind micro-osteoperforation (MOP) when it was first published online ahead of print (Asif MK, Ibrahim N, Sivarajan S, Heng Khiang Teh N, Chek Wey M. Osseous evidence behind micro-osteoperforation technique in accelerating orthodontic tooth movement: a 3-month study. Am J Orthod Dentofacial Orthop 2020;158:579-86.e1). The study highlighted important aspects related to the acceleration of orthodontic tooth movement. We have some questions regarding the trial and would like the authors to enlighten us regarding the same. It was mentioned that scans were performed before the MOP for the 12th week for groups 1 and 3, but it was not clear when the scans were done for group 2. In the inclusion criteria, it was mentioned that patients with less than one half unit Class II molar relationship, requiring the extraction of all first premolars, treated using absolute anchorage were included in the trial. The rate of tooth movement was assessed in a canine retraction model only in the mandibular arch. The retraction of canines in the mandibular arch in a Class II dentition using absolute anchorage may not be a good treatment option. Was any other therapy, such as molar protraction, performed in conjunction with canine retraction? No details regarding the Frankfort-mandibular plane angle of the respective treatment group was mentioned. It is well known that different vertical skeletal patterns have differing rates of tooth movement and thus may have a bearing on the study results.1Pepicelli A. Woods M. Briggs C. The mandibular muscles and their importance in orthodontics: a contemporary review.Am J Orthod Dentofacial Orthop. 2005; 128: 774-780Abstract Full Text Full Text PDF PubMed Scopus (70) Google Scholar Why was a paired-samples t test done to compare the MOP side with the control side, as they represent 2 different clinical scenarios albeit in the same patient? Would an independent t test be a more appropriate test in this case? In addition, because there are clearly 3 groups, we wonder why the analysis of variance test was not used for an intergroup comparison because it would yield very useful information. Finally, we saw a varying number of dropouts in this trial. We wish to ask whether an intention-to-treat analysis was done, and if not, were the final numbers analyzed on a “as treated” protocol basis. If so, this clearly diminishes the original assumptions for sample and power calculations. It is established that the regional acceleratory phenomenon for MOPs is viable only for a period of 4 weeks, and MOPs need to be repeated after every 4 weeks to maintain the regional acceleratory phenomenon for the acceleration of orthodontic tooth movement.2Teixeira C.C. Khoo E. Tran J. Chartres I. Liu Y. Thant L.M. et al.Cytokine expression and accelerated tooth movement.J Dent Res. 2010; 89: 1135-1141Crossref PubMed Scopus (134) Google Scholar As a result, most of the studies evaluating MOPs have repeated them at an interval of 4 weeks. Why were intervals of 8 and 12 weeks taken? Osseous evidence behind micro-osteoperforation technique in accelerating orthodontic tooth movement: A 3-month studyAmerican Journal of Orthodontics and Dentofacial OrthopedicsVol. 158Issue 4PreviewThe study aimed to investigate the effects of micro-osteoperforations (MOPs) on the mandibular bone volume/tissue volume (BV/TV) ratio changes and the rate of orthodontic tooth movement using cone-beam computed tomography images. Another objective was to evaluate the effects of MOP frequency intervals (4 weeks, 8 weeks, and 12 weeks) on the BV/TV ratio and rate of tooth movement. Full-Text PDF Authors’ responseAmerican Journal of Orthodontics and Dentofacial OrthopedicsVol. 159Issue 2PreviewThank you for your interest. In-vivo osseus evidence further illuminates this interesting and popular research subject. Full-Text PDF" @default.
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- W3128393340 title "Osseous evidence behind micro-osteoperforation" @default.
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- W3128393340 doi "https://doi.org/10.1016/j.ajodo.2020.11.008" @default.
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