• Archives of Plastic Surgery
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• 제34권5호
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• pp.635-640
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• 2007

Purpose: Mid and lower facial convexity is more common in Oriental people than in Caucasian. Bimaxillary dentoalveolar protrusion is characterized by procumbent teeth, protruding lips, acute nasolabial angle, gummy smile, receding chin, facial convexity. Especially, pure maxillary dentoalveolar protrusion is less frequent than bimaxillary dentoalveolar protrusion. Therefore, it is important to make an accurate decision for the operation throughout the history taking, cephalogram, dental cast to arrive at accurate diagnosis and surgical plan. Methods: From December 2002 to June 2004, ten patients with maxillary dentoalveolar protrusion and microgenia were corrected by maxillary anterior segmental osteotomy and advancement genioplasty. 10 patients were analyzed by preoperative and postoperative clinical photography, posteroanterior and lateral cephalograms. Results: No major complications were occurred throughout the follow-up period except one of the over-recessed, otherwise most of the patients were satisfied with the result. Conclusion: We could correct the occulusal relationship with teeth and improve lower facial profile, asthetically and functionally, by maxillary anterior segmental osteotomy and advancement genioplasty.

• 대한치과보철학회지
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• 제42권5호
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• pp.524-534
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• 2004

Statement of problem: The meaning of the beauty has a little different nature according to a time, culture, and nation. Purpose : This study was undertaken to estimate the geometric esthetic criteria for Korean woman by analysis of facial photograph in a smiling. Material and methods: The facial photographs of 678 Korean beautiful woman were collected from Miss Korea candidates(from 1971 to 2003 year). The dento-facial composition was measured and analyzed geometrically on computer monitor using $Adobe^{(R)}$ $Photoshop^{(R)}$ 7.0. The statistical significance of the differences among the 4 decade groups was estimated by a $x^2$ test. Result : The Korean beautiful woman skewed the geometric characteristics such as the 'coincidence' (83.0%) between facial midline and dental midline, the 'normal' (96.9%) alignment and arrangement of upper anterior teeth. the 'average' (79.1%) position and 'upward' (53.4%) curvature of upper lip, the 'parallel' (85.7%) relationship between the lower lip and upper anterior incisal curvature, the 'touching' (49.9%) and 'not-touching' (44.8%) relationship between upper anterior incisor and towel lip, the 'first premolar' (54.1%) and 'second premolar' (38.9%) displayed in a smile, and the 'symmetry' (89.4%) of smile. There was statistical significance among the 4 decades in the respect of the upper lip curvature, the relationship between upper anterior incisor and lower lip, and the most posterior teeth displayed in a smile (p<0.05). Conclusion : The Korean beautiful woman showed similar results to the western esthetic criteria in the some respects and the tendency that the Korean woman had more active smiling recently.

• 대한치과교정학회지
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• 제17권1호
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• pp.73-83
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• 1987

The purpose of this longitudinal study was to examine the growth changes of mandibular symphysis and lower incisors with age. The material was 294 lateral cephalometric radiographs taken longitudinally from 6 to 13 year old children, who were not teated orthodontically. The following conclusions seem to be warranted. 1. The sex difference of the measurements of mandibular symphysis and lower incisors were not statistic ally significant. 2. There were growth increments (2.69mm in boys and 2.08mm in girls) in the total thickness of mandibular symphysis. 3. There were a great change and individual variations on the curvature of anterior border of mandibular symphysis. 4. The chin angle had a tendency to decrease progressively in both sexes. 5. There were growth increments (8.23mm in boys and 7.40mm in girls) in the anterior dental height. 6. The lower anterior teeth tended to incline labially with age.

• 대한치과교정학회지
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• 제17권2호
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• pp.165-183
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• 1987

The purpose of this study is to investigate the cephalo-facio-dental relationships in the craniofacial complex and their changes with age, and to use them for diagnostic and treatment purposes in the orthodontics The author studied on the changes of the cephalo-facio-dental relationships, using serial lateral cephalometric roentgenograms of 46 boys and 47 girls aged from 6 to 11 years of normal Korean children Following results were obtained 1 Means and Standard deviation of Korean children were obtained. 2 In the evaluation of the craniofacial vertical proportions, lower anterior face was larger than the upper, and upper posterior face was larger than the lower at all ages 3 The growth change was more prominent in the anterior craniofacial vertical proportion than in the posterior, and growth increment in the upper anterior facial height dimension was larger than m the lower anterior. 4 In the evaluation of the craniofacial horizontal proportion, ANS, Pog, Go and 6 were all situated posterior to their reference ares, and point B was always situated anterior to the arc passing by point A. 5. Anteroposterior growth change was the most prominent in the mandible, and there was no significant difference between the horizontal growth increment in the cranial base and that in the maxilla 6 Growth increment in the horizontal direction was larger in the mandibular apical base than in the maxillary apical base 7 The upper central incisor and the upper first molar were gradually anterior positioned against their reference ares with age increase 8 The length of mandibular corpus was larger than that of cranial base from the seven years old, and the difference was increased as the age increased 9 With age, there was slight difference in the angular relationships formed by craniofacial reference planes and axial inclinations of upper and lower permanent teeth.

• 대한심미치과학회지
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• 제31권1호
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• pp.4-10
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• 2022

하악 전치부에 임플란트를 이용한 수복시 몇가지 어려운 점이 있는데 그중 하나가 전 후방으로 공간이 부족하다는 것이다. 공간이 부족한 경우에 임플란트를 적절한 위치에 식립하는 것도 쉽지 않을뿐아니라 선택할 수 있는 임플란트도 제한될 수있다는 것이다. 적절한 위치에 적절한 임플란트를 식립한 경우에도 보철의 형태에따라 주변치아와 임플란트 주변골에 상당히 큰 영향을 미칠수 있는데 어떤 경우는 임플란트가 주변골을 손상시키는 위해로운 영향을 줄수도 있다. 이번 증례 발표에서는 비교적 양호한 증례와 불량한 증례를 통해서 치은하 형태(Subgingival cotour)의 차이가 임플란트 주위 Marginal bone과 인접치아의 Interproximal bone의 Biology에 다른 결과를 줄수도 있다는 것을 확인할 수있다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제14권3호
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• pp.185-193
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• 1992

The calcifying odontogenic cyst was identified as a pathological entity by Gorlin & his associates in 1962. This lesion is one of the rarest and most disputable cysts in the oral region. The calcifying odontogenic cyst has variable clinical and radiological features. We review the previous literatures and report 2 cases of calcifying odontogenic cyst at Department of Oral and Maxillofacial Surgery, Kyung-Hee University. The 1st case was as follows. The patient vas 22 year old female. The past dental history revealed extraction of prolonged retained #73 tooth about 15days ago. She complained a painful swelling on the lower anterior teeth area. There were chin and vestibular swelling on the lower anterior teeth area, tenderness and missing of #33 tooth. The radiograph revealed well-demarcated unilocular radiolucency containing radiopaque calcific flecks around impacted #33 tooth. The clinical diagnosis was COC, so surgical enucleation was done. There was no recurrence and COC was confirmed by pathologist. The second case was as follows. The patient was 72 year old male. The past history revealed inactive tuberculosis, bronchial asthma and denture construction. The chief complaint was rapidly growing mass on the lower left anterior edentulous area. The clinical findings were chin swelling protruding mass with surface ulceration, fluctuation and a few bloody fluid in aspiration. The radiograph revealed well-demarcated radiolucency mimiking the residual cyst. The biopsy result was COC. The surgical excision was done, but the lesion was recurred 10 months later. The treatment was surgical excision with aggressive peripheral bone grinding and FTSG form groin area. There was no problem during the postoperative period.

• 대한치과교정학회지
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• 제13권1호
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• pp.45-62
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• 1983

To recognize the problems in malocclusion by roentgenocephalograms, the author designed a new pentagonal frame based on maxillary and mandibular bones. The subjects consisted of 44 normal occlusions (20 male and 24 female), 44 Class II division 1 malocclusions (15 male and 29 female) and 67 Class III malocclusions (31 male and 36 female). The results are as follows; 1. In normal group, the maxillary and mandibular skeletons of female we placed more closely to FH plane, so more anteriorly and upward than those of male. 2. In normal group, the posterior vertical height is longer in male than in female and the upper anterior teeth of female are in more labioversion than those of male. 3. By the X, Y coordinate values in pentagonal frame, it is helpful to recognize certain problems in malocclusions. 4. The posterior vertical height is a good indicator in detecting Angle's Class III malocclusion. 5. The maxillary and mandibular body length, the anterior point of maxillary and mandibular body length and the axial inclination of upper and lower anterior teeth can be useful in discerning Angle's Class II & Class III malocclusion.

• 대한소아치과학회지
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• 제37권2호
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• pp.159-167
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• 2010

유치열에 존재하는 우식패턴을 연구하기 위하여 유치열을 가진 유아들을 대상으로 치면별 우식경험도 조사를 실시하고 군 집분석과 다차원척도분석을 실시하였다. 연구대상은 36개월 이상 71개월 이하의 어린이 815명이었다. 군집분석에서 먼저 분리된 네 개의 군집은, 유치는 (1) 유구치, (2) 상악 유절치, (3) 하악 제1유구치, (4) 상악 제1유구치, 유치면은 (1) 하악 유구치 교합면과 상악 제2유구치 교합면, (2) 상악 유중절치 근심면, (3) 하악 제1유구치 교합면, (4) 상하악 제2유구치 교 합면의 분리, 유치면군은 (1) 상악 유전치 인접면, (2) 하악 유구치 교합면, (3) 상악 유전치 협설면, (4) 상악 유구치 협설 면, 인접면, 교합면 및 하악 유구치 협설면과 인접면이었다. 다차원척도분석에서 상호간에 가장 멀리 떨어진 순서로 보았을 때, 유치는 하악 제1유구치, 상악 제1유구치, 상악 유중절치, 상악 유측절치, 하악 제2유구치, 상악 제2유구치, 기타 유치(유견치, 하악 유절치)로 나눌 수 있었고, 유치면은 하악 유구치 교합면, 상악 유중절치 근심면, 상악 유구치 교합면, 기타 유치 면으로 나눌 수 있었으며, 유치면군은 상악 유전치 인접면, 상악 유전치 협설면, 하악 유구치 교합면, 기타 유치면군으로 나눌 수 있었다.

• 대한치과교정학회지
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• 제25권1호
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• pp.73-85
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• 1995

교정치료시 치축의 개선을 위한 많은 연구와 노력이 이루어져 왔다. 본 교실에서는 치축개선을 위해 MEAW를 응용한 Multi-Vertical Loop Arch Wire(MVLAW : 엠빌로)를 수년 전부터 다수치아의 치축을 동시에 개선코자 사용해 왔다. MVLAW는 일종의 근심경사된 치아를 세우는 장치로써 open vertical loop를 3가지 종류로 변형시켜 적용시켜 왔으며 이를 각각 A, B, C형으로 명명하였다. 각 MVLAW는 .017"x.025" TMAwire로 제작되며, A형 MVLAW의 경우 각 open vertical loop의 apex를 10도 정도 벌려주어 활성화시키며(electric welding stop을 각 loop의 근심측에 위치시킨다), B형과 C형 MVLAW의 경우 open vertical loop의 원심측에 10도의 tip back bend를 형성함으로써 활성화시킨다(B형의 경우 electric welding stop이 각 loop의 원심측에 형성되는 반면 C형의 경우 electric welding stop을 형성하지 않는다). 본 연구는 구치부의 치축을 동시에 개선코자할 때 MVLAW를 3가지 종류로 분류한 후 각 MVLAW의 효과를 알아보고자 상하악 1/2악을 광탄성 모형에 재현하여 그 응력분포를 관찰하여 다음과 같은 결론을 얻었기에 보고하는 바이다. 1. A형 MVLAW의 경우 3급 견인고무를 걸지 않았을 경우 하악 제1대구치와 제2대구치 치근의 원심면에서 강한 응력분포를 나타내나 전치부에 발생한 미약한 응력분포는 3급 견인고무의 장착으로 상쇄되었다. 따라서 A형 MVLAW는 초기에 치관의 직립효과가 있는 것으로 보인다. 2. B형 MVLAW의 경우 3급 견인고무를 걸지 않았을 경우 각 치아의 근심측에 응력분포를 보이며 견인고무를 걸었을 때와 비교시 전치부에 증가된 응력분포를 보였다. 따라서 B형의 경우 초기에 치근의 직립효과가 있는 것으로 보인다. 3. C형 MVLAW의 경우 3급 견인고무를 걸지 않았을 경우 하악전치부를 제외하고는 응력분포를 나타내지 않았으나 견인고무를 걸었을 경우 주로 견치와 소구치 근심면에서 응력분포를 보였다. 따라서 C형의 경우 견인고무 사용시 초기에 견치와 소구치에서 치근의 직립효과가 있는 것으로 보인다.

• 대한치과교정학회지
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• 제23권1호
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• pp.115-122
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• 1993

This study was undertaken to compare the activity of masticatory muscle between normal occlusion and anterior openbite. 33 subjects without the experience of orthodontic treatment, missing teeth and the symptom of T. M. disorders were selected for this study : 25 subjects were normal occlusion and 8 subjects were anterior openbite. The ten items were measured from the cephalometric headplates, and EMG recordings of the anterior temporal and masseter muscle were taken at rest position and during maximum clenching at centric occlusion. All data were analyzed and processed with the computer statistical method. The following results were obtained : 1. At rest position, the muscle activities of both temporal and masseter muscle were higher in anterior openbite than in normal occlusion. 2. During maximum clenching, the muscle activities of both temporal and masseter muscle were prominently lower in anterior openbite than in normal occlusion. 3. At rest position, the temporal muscle of anterior openbite showed the highest muscle activity, but showed the lowest muscle activity during maximum clenching. 4. Anterior openbite showed closer interrelationship between facial morphology and the muscle activity, and the muscle activity was more influenced by the form of mandible than that of maxilla.