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Quantitative analysis of mutans streptococci adhesion to various orthodontic bracket materials in vivo

Yu JK, Ahn SJ, Lee SJ, Chang YI

OBJECTIVE: To estimate the effects of bracket material type on enamel decalcification during orthodontic treatment, this study analyzed the adhesion level of mutans streptococci (MS) to orthodontic bracket materials in...
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Comparison of landmark position between conventional cephalometric radiography and CT scans projected to midsagittal plane

Park JW, Kim N, Chang YI

OBJECTIVE: The purpose of this study is to compare landmark position between cephalometric radiography and midsagittal plane projected images from 3 dimensional (3D) CT. METHODS: Cephalometric radiographs and CT scans were...
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Effects of various NSAIDs on prostaglandin synthesis and cellular configuration of human periodontal ligament cells

Kim HS, Shim HY, Chae CH, Chang YI, Park JW

  • KMID: 2005268
  • J Korean Assoc Oral Maxillofac Surg.
  • 2007 Oct;33(5):455-463.
The present study was designed to evaluate effects of the commonly used NSAIDs(acetaminophen, aspirin, and ibuprofen) on human periodontal ligament cells. Human periodontal ligament cells were grown from a cell...
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Comparing locus of control in orthodontic patients of a university dental hospital with those of a private dental clinic

Ku SJ, Lee SJ, Kim TW, Chang YI

  • KMID: 1513130
  • Korean J Orthod.
  • 2006 Dec;36(6):442-450.
OBJECTIVE: Many factors are considered when a patient chooses the type of dental institution they wish to receive treatment from. Numerous studies have been conducted regarding this issue. However, more...
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Surgical orthodontic treatment of skeletal Class III malocclusion using mini-implant: correction of horizontal and vertical dental compensation

Im DH, Park HJ, Park JW, Kim JI, Chang YI

  • KMID: 2273645
  • Korean J Orthod.
  • 2006 Oct;36(5):388-396.
Treatment of skeletal Class III malocclusion with mini-implant anchorage is discussed in relation to vertical control of the maxillary posterior dentoalveolar region and horizontal control of mandibular anterior teeth. A...
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Effect of dual pitch mini-implant design and diameter of an orthodontic mini-implant on the insertion and removal torque

Kim JW, Cho IS, Lee SJ, Kim TW, Chang YI

  • KMID: 2273586
  • Korean J Orthod.
  • 2006 Aug;36(4):275-283.
OBJECTIVE: Small orthodontic mini-implants are useful as anchorage. However they have some weaknesses such as loosening. This study was carried out to analyze the mechanical effects of the dual pitch...
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Identification of bacteria from the peri-implant sulcus of orthodontic mini-implants using 16S rDNA clone library

Lim SH, Kim KW, Yoo SY, Kook JK, Chang YI

  • KMID: 2273584
  • Korean J Orthod.
  • 2006 Aug;36(4):251-262.
OBJECTIVE: The purpose of this study was to compare the bacterial flora at the peri-implant sulcus of the orthodontic mini-implant placed in the alveolar mucosa with the bacterial flora at...
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Methods for Glomerular Filtration Rate Measurement

Chang YI

  • KMID: 1597796
  • Korean J Nephrol.
  • 2006 Jul;25(4):521-524.
No abstract available.
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Spacing and crowding of the primary dentition in Korean children - relationship to tooth sizes and dental arch dimension

Im DH, Kim TW, Nahm DS, Chang YI

  • KMID: 2273286
  • Korean J Orthod.
  • 2006 Feb;36(1):84-90.
The aims of this study were to investigate the prevalence of spaced, closed, and crowded primary dentitions by sex and arch in Korean children from Kanghwa, and to determine the...
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Mechanical analysis of the taper shape and length of orthodontic mini-implant for initial stability

Kim JW, Cho IS, Lee SJ, Kim TW, Chang YI

  • KMID: 2273283
  • Korean J Orthod.
  • 2006 Feb;36(1):55-62.
Orthodontic mini-implants, despite its usefulness as anchorage, have some limits such as loosening. Therefore, various shapes and lengths have been studied. The aim of this study is to analyze the...
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Preliminary study on the effect of inflamed TMJ synovial fluid on the intracellular calcium concentration and differential expression of iNOS and COX-2 in human immortalized chondrocyte C28/I2

Choi EA, Lee DG, Chae CH, Chang YI, Park YJ, Kim YK

  • KMID: 2190355
  • J Korean Assoc Oral Maxillofac Surg.
  • 2006 Feb;32(1):36-41.
OBJECTIVE: The objective of this study was to examine the hypothesis that inflammatory synovial fluid from TMJ internal derangement initiates a transient increase in intracellular calcium concentration ([Ca2+]i) in chondrocytes...
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Formulation of a reference coordinate system of three-dimensional head and neck images: Part II. Reproducibility of the horizontal reference plane and midsagittal plane

Park JW, Kim NK, Chang YI

  • KMID: 1975958
  • Korean J Orthod.
  • 2005 Dec;35(6):475-484.
This study was performed to investigate the reproducibility of the horizontal and midsagittal planes, and to suggest a stable coordinate system for three-dimensional (3D) cephalometric analysis. Eighteen CT scans were...
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Formulation of a reference coordinate system of three-dimensional (3D) head and neck images: Part I. Reproducibility of 3D cephalometric landmarks

Park JW, Kim NK, Chang YI

  • KMID: 2271941
  • Korean J Orthod.
  • 2005 Oct;35(5):388-397.
The purpose of this study was to redefine the cephalometric landmarks in three-dimensional (3D) images, which are used in orthodontic cephalometric radiography, and to evaluate the reproducibility of each landmark...
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Three-dimensional analysis of soft and hard tissue changes after mandibular setback surgery in skeletal Class III patients

Park JW, Kim NK, Kim MJ, Chang YI

  • KMID: 1762559
  • Korean J Orthod.
  • 2005 Aug;35(4):320-329.
The three-dimensional (3D) changes of bone, soft tissue and the ratio of soft tissue to bony movement was investigated in 8 skeletal Class III patients treated by mandibular setback surgery....
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Direct detection of cariogenic streptococci in metal brackets in vivo using polymerase chain reaction

Ahn SJ, Lee SJ, Baek SH, Kim TW, Chang YI, Nahm DS, Lim BS

  • KMID: 1762558
  • Korean J Orthod.
  • 2005 Aug;35(4):312-319.
Streptococcus mutans and Streptococcus sobrinus are major etiological agents in enamel demineralization around orthodontic appliances. This study was designed to examine the prevalence of these streptococci on orthodontic brackets in...
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Tooth size and arch parameters of normal occlusion in a large Korean sample

Lee SJ, Moon SC, Kim TW, Nahm DS, Chang YI

  • KMID: 2400556
  • Korean J Orthod.
  • 2004 Dec;34(6):473-480.
The aim of this study was to establish normative data on the tooth size and arch parameters of Koreans with normal occlusion. This study employed the dental casts of 296...
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Effect of the lower third molar on the treatment of Class III malocclusion

Son MH, Chang YI

  • KMID: 2271945
  • Korean J Orthod.
  • 2004 Oct;34(5):394-407.
The purpose of this study was to evaluate the effect of the lower third molar on treatment time and distal en masse movement of the lower dentition in Class III...
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Dentoalveolar compensation according to skeletal discrepancy in Normal occlusion

Shim HY, Chang YI

  • KMID: 2271944
  • Korean J Orthod.
  • 2004 Oct;34(5):380-393.
The purpose of this study was to investigate the dentoalveolar compensation according to anteroposterior skeletal discrepancy in normal occlusion and to evaluate cephalometric parameters that quantitatively describe dental compensations. The...
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Evaluation of various cephalometric measurements to predict the prognosis of early Class III malocclusion treatment

Son MH, Chang YI

  • KMID: 1976092
  • Korean J Orthod.
  • 2004 Jun;34(3):205-218.
The aims of this study were to investigate the differences in the early craniofacial morphology of Class III malocclusions with good, fair and poor occlusal stability and to elucidate a...
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The Spontaneous Resolution of Idiopathic Macular Hole Diagnosed with OCT

Chang YI, Lee JG, Lee EK

  • KMID: 2126050
  • J Korean Ophthalmol Soc.
  • 2004 May;45(5):864-868.
PURPOSE: To report two cases of spontaneous resolution of macular hole stage 1 and 2, that were objectively diagnosed with OCT(optical coherence tomography). METHODS: Case 1-A 64-year-old woman without systemic...
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