• 대한치과의사협회지
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• 제13권12호
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• pp.1135-1139
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• 1975

A boy aged 13 years 5 months, had a Angle's clss I malocclusion characterized by severe anterior crowding. Molar relationship was neutroclusion, incisor overbite was 4mm, incisor overjet was 3mm. The patient underwent extraction of four first premolars and was treated with a multi-banded light force system. On the process of the orthodontic treatment, the teeth, obtained functional occlusion. The result of treatment was very satisfactory; color, vitality and mobility were normal, periodontal condition was good and the cosmetic result was excellent.

• 대한치과의사협회지
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• 제38권8호통권375호
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• pp.773-779
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• 2000

• 대한치과의사협회지
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• 제13권10호
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• pp.929-933
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• 1975

A girl aged 15 years 6 months, had a class Ⅲ malocclusion characterized by severe maxillary anterior crowding and a retarded maxilla. Molar relationship was class Ⅲ on both sides, incisor overjet was - 2.9mm. and incisor overbite was 5.5mm. The patient underwent extraction of four first premolars and was trested with a multi-banded light force system. After 13 months, the patient gained a normal verbite-overjet relationship of anterior teeth and a class 1 molar relationship. Superimposition of pretreatment and posttreatment cephalograms upon the line SN registered at S showed backward downward rotation of the mandible.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2019년도 춘계종합학술대회
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• pp.275-276
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• 2019

The purpose of this study was to assess condylar size in volumetric 3D imaging in patients with class I, class II, class III malocclusions. To evaluate the differences among the three experimental groups, the condylar values of men were analyzed. There was a significant difference in the measured values of height. Among the three experimental groups, the condylar measurements in women showed significant differences in height and width. This study is expected to be used for determining the connection between malocclusion and condyle as a base line data.

• Journal of Oral Medicine and Pain
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• 제46권1호
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• pp.14-19
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• 2021

Various conditions such as pain or effusion of temporomandibular joint, degenerative condylar resorption, and articular disc displacement can be a cause of malocclusion. However, the reasons of occlusal changes are ambiguous in some patients. Unexpected occlusal change in patients with or without temporomandibular disorder (TMD) symptom was mostly caused by masticatory muscular disorders. This article reports two cases of recovery of occlusal relationship in TMDs patients after stabilization splint therapy. Stabilization splint therapy could be useful in certain conditions of occlusal changes in TMD.

• 대한치과교정학회지
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• 제43권6호
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• pp.288-293
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• 2013

Objective: This study was aimed at comparing the mandibular arch forms of Korean and Vietnamese patients by using facial axis (FA) points on three-dimensional (3D) models. Methods: Mandibular casts of 68 Korean (Class I malocclusion, 30; Class II malocclusion, 38) and 78 Vietnamese (Class I malocclusion, 41; Class II malocclusion, 37) patients were scanned in their occluded positions and grouped according to arch form (tapered, ovoid, and square). The FA point of each tooth was digitized on the 3D mandibular models. The measurements and frequency distributions of the arch forms were compared between the ethnic groups. Results: The Vietnamese patients had significantly greater intercanine depth and intercanine and intermolar width-to-depth ratios than the Korean patients (p < 0.05). The frequency distributions of the arch forms were also significantly different (p = 0.038), but no sexual dimorphism was found. Conclusions: Vietnamese people tend to have deeper and wider arches than Korean people. The three arch forms are evenly distributed in Korean people, but Vietnamese people frequently have square arches. Clinicians should identify the correct arch form of an ethnic group before initiating orthodontic treatment.

• 대한치과교정학회지
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• 제24권3호
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• pp.695-707
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• 1994

This study investigates the effects of third molar on the occlusal plane in Angle's class El malocclusion with possibilities of posterior crowding and the interrelationships of occlusal plane inclinations to other skeletal patterns. Above investigations might showed that considerations should be given to third molars with possibilities of posterior crowding in establishing diagnosis and treatment plans for Angle's class III malocclusion patients. The following conclusions were obtained 1. In events of third molars causing possible posterior crowding, maxillary third molars showed more mesial inclinations than second molars, and compared to those with third molar missing cases, first molars were more mesially inclined and displaced more inferiorly from the palatal plane and OP-MP was increase , thus the occlusal plane was less steep. 2. In events of third molars causing possible posterior crowding, the anglulation between AB line and mandibular plane was decreased and ANB showed negative values. Thus chin points were more protruded, ramus were more anteriorly displaced, and increase in lower facial height, genial angle, effective mandibular length and mandibular plane angle were observed. This in all caused more vertical opening and more severe skeletal disturbance. 3. OP-MP was increased as the maxillary first molars were more inferiorly displaced from the palatal plane. As this angle was increased mandibular planes were more inferiorly inclined and LFH, genial angle, effective mandibular length were more increased and mandibular ramus was more anteriorly placed. 4. As the maxillary first molars were more inferiorly placed from the palatal plane, more increased OP-MP/PP-MP ratio made the occlusal plane less steep. As OP-MP/PP-MP was increased, mandibular ramus was more anteriorly placed and made longer, and facial angle and effective mandibular length were increased.

• 대한치과교정학회지
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• 제37권1호통권120호
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• pp.29-43
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• 2007

본 연구는 성장기 II급 부정교합자를 골격 형태에 따라 분류하여 액티베이터 사용 효과를 비교, 분석하고 그 결과를 진단, 치료 계획 수립 등 임상 과정에 연계시키기 위해 시행되었다. 실험은 수완부 방사선 사진상 Fishman 분류의 2, 3, 4 단계로 최대성장기 이전의 II급 부정교합자를 대상으로 하였다. 대조군은 ANB 3도 이상이며 악정형 장치 치료를 받지 않고 치열교정 치료만 받은 환자로 총 25명(남자 15명, 여자 10명)이고 실험군은 액티베이터 치료를 받은 환자로 총 116명(남자 53명, 여자 63명)이었다. Articular angle과 gonial angle을 이용하여 골격 형태를 hyperdivergent type과 hypodivergent type으로 분류하여 액티베이터 치료효과를 비교한 결과 hypodivergent한 골격 형태를 가진 환자에서 더 큰 효과를 보였다. 따라서 성장기 II급 부정교합자의 진단과 치료계획 수립 시 안모의 골격 형태 분류를 통해 액티베이터의 효과를 예측할 수 있다고 생각한다.

• 대한소아치과학회지
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• 제44권2호
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• pp.147-153
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• 2017

본 연구는 5 - 10세 아동에서 상악 제1대구치의 이소맹출과 골격적 부정교합 유형 사이의 연관성을 평가하고자 하였다. 상악 제1대구치의 이소맹출이 있는 93명의 아동을 실험군으로, 이소맹출이 없는 693명의 아동을 대조군으로 분류하였다. 제1대구치가 맹출 전이거나 제2대구치가 맹출을 완료한 경우는 연구대상에서 제외하였다. 측모 두부 방사선 사진 계측을 통해 골격적 부정교합의 유형을 조사, 분석하였다. 실험군의 경우, 골격성 3급 부정교합이 57.0% 이었고, 대조군에 비해 골격성 3급 부정교합의 비율이 유의하게 높았다. SNA, ANB, A to N-perpendicular는 실험군에서 작은 경향을 보였고, A-B plane angle과 APDI는 더 크게 나타났다. 반면, SNB와 mandibular plane angle은 두 군 사이에서 유의한 차이가 없었다. 본 연구를 통해 상악의 열성장이 상악 제1대구치의 이소맹출에 영향을 미칠 수 있음을 확인하였다.

• 대한치과교정학회지
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• 제48권6호
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• pp.357-366
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• 2018

Objective: The purpose of this study was to analyze the transverse dental compensation in reference to the maxillary and mandibular basal bones using cone-beam computed tomography (CBCT) and evaluate the correlations between transverse dental compensation and skeletal asymmetry variables in patients with skeletal Class III malocclusion and facial asymmetry. Methods: Thirty patients with skeletal Class I (control group; 15 men, 15 women) and 30 patients with skeletal Class III with menton deviation (asymmetry group; 16 men, 14 women) were included. Skeletal and dental measurements were acquired from reconstructed CBCT images using OnDemand3D 1.0 software. All measurements were compared between groups and between the deviated and nondeviated sides of the asymmetry group. Correlation coefficients for the association between skeletal and dental measurements were calculated. Results: Differences in the ramus inclination (p < 0.001), maxillary canine and first molar inclinations (p < 0.001), and distances from the canine and first molar cusp tips to the midmaxillary or midmandibular planes (p < 0.01) between the right and left sides were significantly greater in the asymmetry group than in the control group. In the asymmetry group, the ramus inclination difference (p < 0.05) and mandibular canting (p < 0.05) were correlated with the amount of menton deviation. In addition, dental measurements were positively correlated with the amount of menton deviation (p < 0.05). Conclusions: Transverse dental compensation was correlated with the maxillary and mandibular asymmetry patterns. These results would be helpful in understanding the pattern of transverse dental compensation and planning surgical procedure for patients with skeletal Class III malocclusion and facial asymmetry.