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KJO Korean Journal of Orthodontics

Open Access

pISSN 2234-7518
eISSN 2005-372X

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Korean J Orthod 2016; 46(6): 343-344   https://doi.org/10.4041/kjod.2016.46.6.343

First Published Date November 14, 2016, Publication Date November 25, 2016

Copyright © The Korean Association of Orthodontists.

Reader’s Forum

Seung-Youp Lee

Department of Orthodontics, School of Dentistry, Chonbuk National University, Iksan, Korea.

Body

Kang JM, Park JH, Bayome M, Oh M, Park CO, Kook YA, Mo SS

A three-dimensional finite element analysis of molar distalization with a palatal plate, pendulum, and headgear according to molar eruption stage.

- Korean J Orthod 2016;46:290-300

First of all, I want to thank the authors for this interesting article. I am in agreement with the authors in that modified palatal anchorage plate is an effective appliance to distalize the maxillary molars. Also, I hope to request the authors to address the following questions to clarify what was conveyed in the article.

Q1. In the design of cervical-pull headgear described in the finite element model, no counter arch was present. If there is a mandibular dentition, could it be possible for the parameter of Z to be different from what was reported in the result section?

Q2. In the case of bone-anchored pendulum appliance, the first molar showed mesial-in rotation. But, the force of distalization was applied from palatal side. In such a case wouldn’t it more likely to result in mesial-out rotation of molar?

Q3. In the case of bone-anchored pendulum appliance, the second molar showed extrusion. Could you please explain more about this phenomenon?

Article

Reader’s Forum

Korean J Orthod 2016; 46(6): 343-344   https://doi.org/10.4041/kjod.2016.46.6.343

First Published Date November 14, 2016, Publication Date November 25, 2016

Copyright © The Korean Association of Orthodontists.

Reader’s Forum

Seung-Youp Lee

Department of Orthodontics, School of Dentistry, Chonbuk National University, Iksan, 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

Kang JM, Park JH, Bayome M, Oh M, Park CO, Kook YA, Mo SS

A three-dimensional finite element analysis of molar distalization with a palatal plate, pendulum, and headgear according to molar eruption stage.

- Korean J Orthod 2016;46:290-300

First of all, I want to thank the authors for this interesting article. I am in agreement with the authors in that modified palatal anchorage plate is an effective appliance to distalize the maxillary molars. Also, I hope to request the authors to address the following questions to clarify what was conveyed in the article.

Q1. In the design of cervical-pull headgear described in the finite element model, no counter arch was present. If there is a mandibular dentition, could it be possible for the parameter of Z to be different from what was reported in the result section?

Q2. In the case of bone-anchored pendulum appliance, the first molar showed mesial-in rotation. But, the force of distalization was applied from palatal side. In such a case wouldn’t it more likely to result in mesial-out rotation of molar?

Q3. In the case of bone-anchored pendulum appliance, the second molar showed extrusion. Could you please explain more about this phenomenon?