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Estimation of the prevalence of malocclusion on the basis of nationwide oral health examinations of pre-adolescent and adolescent students during 2012–2017

Hong M, Kyung HM, Park HS, Yu WJ, Baek SH

Objective: To investigate the prevalence of malocclusion with respect to grade, sex, and year among Korean pre-adolescent and adolescent students during 2012–2017. Methods: A total of 165,996 students (first grade...
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Comparison of inclination and vertical changes between single-wire and double-wire retraction techniques in lingual orthodontics

Hung BQ, Hong M, Yu W, Kyung HM

OBJECTIVE: The Heat Induction Typodont System (HITS), used in some recent studies, has a distinct advantage over previous tooth movement simulation methods. This study aimed to compare inclination and vertical...
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Effects of bracket slot size during en-masse retraction of the six maxillary anterior teeth using an induction-heating typodont simulation system

Kim JY, Yu WJ, Koteswaracc PNK, Kyung HM

OBJECTIVE: To investigate how bracket slot size affects the direction of maxillary anterior tooth movement when en-masse retraction is performed in sliding mechanics using an induction-heating typodont simulation system. METHODS: An...
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Incorporation of silver nanoparticles on the surface of orthodontic microimplants to achieve antimicrobial properties

Venugopal , Muthuchamy N, Tejani H, Gopalan AI, Lee KP, Lee HJ, Kyung HM

OBJECTIVE: Microbial aggregation around dental implants can lead to loss/loosening of the implants. This study was aimed at surface treating titanium microimplants with silver nanoparticles (AgNPs) to achieve antibacterial properties. METHODS:...
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Stress dissipation characteristics of four implant thread designs evaluated by 3D finite element modeling

Nam OH, Yu WJ, Kyung HM

PURPOSE: The aim was to investigate the effect of implant thread designs on the stress dissipation of the implant. MATERIALS AND METHODS: The threads evaluated in this study included the V-shaped,...
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Debonding forces of three different customized bases of a lingual bracket system

Sung JW, Kwon TY, Kyung HM

OBJECTIVE: The purpose of this study was to investigate whether extension of the custom base is necessary for enhancement of bond strength, by comparing the debonding forces and residual adhesives...
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Effect of surface anodization on stability of orthodontic microimplant

Karmarker , Yu W, Kyung HM

  • KMID: 2393238
  • Korean J Orthod.
  • 2012 Feb;42(1):4-10.
OBJECTIVE: To determine the effect of surface anodization on the interfacial strength between an orthodontic microimplant (MI) and the rabbit tibial bone, particularly in the initial phase after placement. METHODS: A...
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Optimization of orthodontic microimplant thread design

Kim KD, Yu WJ, Park HS, Kyung HM, Kwon OW

OBJECTIVE: The purpose of this study was to optimize the thread pattern of orthodontic microimplants. METHODS: In search of an optimal thread for orthodontic microimplants, an objective function stability quotient (SQ)...
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Finite element analysis of peri-implant bone stresses induced by root contact of orthodontic microimplant

Yu WJ, Kim MR, Park HS, Kyung HM, Kwon OW

OBJECTIVE: The aim of this study was to evaluate the biomechanical aspects of peri-implant bone upon root contact of orthodontic microimplant. METHODS: Axisymmetric finite element modeling scheme was used to analyze...
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Microimplant mandibular advancement (MiMA) therapy for the treatment of snoring and obstructive sleep apnea (OSA)

Ngiam J, Kyung HM

This case report describes the treatment of a 66 year old adult patient with a diagnosis of severe obstructive sleep apnea who was intolerant of nasal continuous positive airway pressure...
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Finite element analysis of cortical bone strain induced by self-drilling placement of orthodontic microimplant

Park JS, Yu W, Kyung HM, Kwon OW

OBJECTIVE: The aim of this study was to evaluate the strain induced in the cortical bone surrounding an orthodontic microimplant during insertion in a self-drilling manner. METHODS: A 3D finite...
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Cortical bone strain during the placement of orthodontic microimplant studied by 3D finite element analysis

Nam O, Yu W, Kyung HM

OBJECTIVE: The aim of this study was to evaluate the strain induced in the cortical bone surrounding an orthodontic microimplant during insertion. METHODS: A 3D finite element method was used...
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Torque and mechanical failure of orthodontic micro-implant influenced by implant design parameters

Yu W, Kyung HM

  • KMID: 2273339
  • Korean J Orthod.
  • 2007 Jun;37(3):171-181.
OBJECTIVE: The present study was aimed at an analytical formulation of the micro-implant related torque as a function of implant size, i.e. the diameter and length, screw size, and the...
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Comparison of histologic observation and insertional and removal torque values between titanium grade 2 and 4 microimplants

Kang ST, Kwon OW, Sung JH, Kyung HM, Park HS

  • KMID: 2273330
  • Korean J Orthod.
  • 2006 Jun;36(3):171-177.
The purpose of this study was to evaluate the light microscopic features and the maximum insertional and removal torque value of microimplants, made from titanium grade 2 or 4, in...
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Osteodistraction of the Hypoplastic Maxilla using a Rigid External Distraction System: The Results of a One to Six-year Follow-up

Cho BC, Kyung HM

  • KMID: 2118027
  • J Korean Cleft Palate-Craniofac Assoc.
  • 2005 Apr;6(1):17-26.
A rigid external distraction device has been used for maxillary distraction osteogenesis and a number of papers have reported midface distraction after using this system. However, there is not enough...
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Effects on osteoclast in periodontal ligament space by denerveation of inferior alveolar nerve in young and adult rats

Park KD, Sung JH, Bae YC, Kyung HM

  • KMID: 2400560
  • Korean J Orthod.
  • 2004 Dec;34(6):506-513.
Osteoclast action is necessary for alveolar bone remodeling in orthodontic tooth movement. The nervous system has also been reported to be associated with bone remodeling. This study was aimed to...
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Elastic force degradation of synthetic elastomeric chain

Heo CH, Sung JH, Kwon OW, Kyung HM

  • KMID: 1924034
  • Korean J Orthod.
  • 2003 Oct;33(5):371-380.
The purpose of this study was to evaluate the force degradation rate of synthetic elastomeric chains during space closing phase of orthodontic treatment. Two kinds of synthetic elastomeric chains(RMO, 3M)...
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Three-dimensional finite element analysis of initial tooth displacement according to force application point during maxillary six anterior teeth retraction using skeletal anchorage

Kim CN, Sung JH, Kyung HM

  • KMID: 1924031
  • Korean J Orthod.
  • 2003 Oct;33(5):339-350.
The purpose of this study was to investigate the micro-implant height and anterior hook height to prevent maxillary six anterior teeth from lingual tipping and extruding during space closure. We...
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Osteodistraction of Midface Using Rigid External Distraction Device

Lee JH, Shin DP, Park JW, Cho BC, Baik BS, Yoon KT, Kyung HM, Sung JH

  • KMID: 2041055
  • J Korean Soc Plast Reconstr Surg.
  • 2000 Nov;27(6):590-597.
We treated a total of 4 patients with midfacial hypoplasia, aged 12 to 19 years, using distraction osteogenesis between January 1998 and June 1999. In 3 patients with severe maxillary...
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Changes in CGRP-immunoreactive nerve fibers during expansion of midpalatal suture of the rat

Kim BK, Kyung HM, Kwon OW, Sung JH, Park KP

  • KMID: 1923860
  • Korean J Orthod.
  • 1999 Feb;29(1):73-81.
Midpalatal suture expansion if often used for patients having narrow maxillary arch, cleft palate, respiratory handicap with narrow nasal cavity. CGRP has been known as a modulator of pain transmission...
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