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KJO Korean Journal of Orthodontics

Open Access

pISSN 2234-7518
eISSN 2005-372X

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Korean J Orthod 2018; 48(6): 347-348   https://doi.org/10.4041/kjod.2018.48.6.347

First Published Date September 14, 2018, Publication Date November 25, 2018

Copyright © The Korean Association of Orthodontists.

Reader's Forum

Ji-Young Kim

Private Practice, Seoul, Korea.

Body

Oh HJ, Cha JY, Yu HS, Hwang CJ

Histomorphometric evaluation of the bone surrounding orthodontic miniscrews according to their adjacent root proximity.

- Korean J Orthod 2018;48:283-291

I would like to express my gratitude to the authors for their excellent work. Miniscrews are now one of the main tools in everyday orthodontics and therefore research articles on the topic, such as this, can be very helpful to the clinicians.

Q1. Root proximity or root invasion of the miniscrews related with the failure rate has been discussed in many studies. To my knowledge, most of them have reported that root proximity was one of the major factors for miniscrew failure. However, the result of this study indicated only one miniscrew failed among 12 in the high root proximity group and this failure rate is much lower than what was reported in other articles. Please briefly summarize the possible reasons for this low failure rate in the present study.

Q2. In the discussion section the authors cited four references that the self-drilling insertion method was superior to the self-tapping method in the perspective of decreasing failure rate from root contact. Please describe briefly the mechanism of reduction in the failure rate. Do the authors recommend use of the self-drilling method if close root proximity is anticipated?

Q3. It has been reported that surface treated miniscrews could survive better despite their proximity to the dental roots.1 Surface treatment can affect the bone-implant contact (BIC) by promoting osseointegration. Were the miniscrews used in this study surface treated? Please express authors' opinion on the surface treatment and the failure rate associated with the high root proximity of miniscrews.

Article

Reader’s Forum

Korean J Orthod 2018; 48(6): 347-348   https://doi.org/10.4041/kjod.2018.48.6.347

First Published Date September 14, 2018, Publication Date November 25, 2018

Copyright © The Korean Association of Orthodontists.

Reader's Forum

Ji-Young Kim

Private Practice, Seoul, Korea.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Body

Oh HJ, Cha JY, Yu HS, Hwang CJ

Histomorphometric evaluation of the bone surrounding orthodontic miniscrews according to their adjacent root proximity.

- Korean J Orthod 2018;48:283-291

I would like to express my gratitude to the authors for their excellent work. Miniscrews are now one of the main tools in everyday orthodontics and therefore research articles on the topic, such as this, can be very helpful to the clinicians.

Q1. Root proximity or root invasion of the miniscrews related with the failure rate has been discussed in many studies. To my knowledge, most of them have reported that root proximity was one of the major factors for miniscrew failure. However, the result of this study indicated only one miniscrew failed among 12 in the high root proximity group and this failure rate is much lower than what was reported in other articles. Please briefly summarize the possible reasons for this low failure rate in the present study.

Q2. In the discussion section the authors cited four references that the self-drilling insertion method was superior to the self-tapping method in the perspective of decreasing failure rate from root contact. Please describe briefly the mechanism of reduction in the failure rate. Do the authors recommend use of the self-drilling method if close root proximity is anticipated?

Q3. It has been reported that surface treated miniscrews could survive better despite their proximity to the dental roots.1 Surface treatment can affect the bone-implant contact (BIC) by promoting osseointegration. Were the miniscrews used in this study surface treated? Please express authors' opinion on the surface treatment and the failure rate associated with the high root proximity of miniscrews.