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American Journal of Orthodontics and Dentofacial Orthopedics, 2021-07-01, Volume 160, Issue 1, Pages 8-9, Copyright © 2021 American Association of Orthodontists

Thank you for reading and evaluating our article.

Regarding your first point, the lower bound was −0.33, and the upper bound was 1.32. We apologize for the typographical error in writing the bounds.

Your second comment is interesting. We could not do any measurements on the first molars at the beginning of the treatment (T0) because the cephalometric radiographs were taken before starting the orthodontic treatment. So, there were no molar bands to be able to do any measurements on the first molars. We started the measurements on the first molars at the end of leveling and alignment phase and before starting the en-masse retraction phase (T1). When we first submitted the manuscript for review to the American Journal of Orthodontics and Dentofacial Orthopedics , we included a Table reporting the measurements before starting the en-masse retraction phase (T1), but 1 of the reviewers asked us to delete this Table to decrease the number of tables included in the article. We are happy to provide the measurements now so that you can see the exact amounts on the intrusion and distalization of the first molars at the end of the en-masse retraction phase.

See Also

Table
Descriptive statistics of the maxillary first molar positions in the horizontal and vertical planes at 2 assessment times
Measurements Flapless corticotomy group Traditional corticotomy group
T1 T2 T1 T2
Mean SD Mean SD Mean SD Mean SD
MUM-H (mm) 42.32 6.29 42.19 6.20 42.22 5.27 42.10 5.32
MUM-V (mm) 68.85 5.04 68.20 4.94 68.77 3.43 68.10 3.45

Thank you very much for your important final point. When we did the statistical analysis for our study, we got 3 digits after the decimal point. So, the calculated value for the mean difference in the SNA angle at the end of en-masse retraction of maxillary anterior teeth (T2) was −0.445. We preferred to include only 2 digits after the decimal point; the final rounded value was −0.45. This is the same situation for the other mentioned variables in your query.