• 대한치과의사협회지
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• 제15권3호
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• pp.199-204
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• 1977

The patient, 19 years old female, complained of protrusion of upper and lower anterior teeth. Teeth lining was good except slight crowding in lower anterior teeth. Teeth lining was good except slight crowding in lower incisors, but distocclusion in the region of right buccal segment was present. Cephalometric analysis revealed normal relation between maxilla and cranial base. The labial inclination of upper and lower anterior teeth was severe, so diagnosed as bialveolar protrusion case. She was treated by means of multibanded system under the extraction of four first bicuspids. After 1 year and 4 months. She gained good interdigitation of buccal segments and attractive facial profile because the labioversion of incisors was reduced properly.

• 대한심미치과학회지
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• 제8권1호
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• pp.60-63
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• 1999

Dental clinicians commonly encounter extrusion of the anterior teeth due to localized alveolar bone loss in adult patients with chronic periodontitis. This pathologic migration of the anterior not only may cause loss of functional anterior guidance and continuous periodontal destruction, but also can lead to esthetic disaster. In fact, most frequently reported chief complaint of the patients with extruded anterior teeth is the 'loss of esthetics', not the periodontal problem itself. The utilization of the expertise and skills in the various dental disciplines is thought to be the best treatment modality for the ultimate functional and esthetic attainment. Interdisciplinary therapy, involving periodontics, orthodontics, and restorative dentistry, was performed for the highest levels of patient and provider satisfaction in this case.

• 대한치과교정학회지
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• 제27권2호
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• pp.259-272
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• 1997

Segmented arch mechanics를 적용하여 상악 전치에 intrusive force를 가할 때 저항중심의 전후방 위치를 알아내기 위해 상악 6전치와 치근막 및 치조골의 3차원 유한요소모델을 제작하였다. intrusion시키고자 하는 치아의 수, 치축의 경사도 및 치조골의 흡수 정도에 따른 저항중심의 위치 변화를 비교 관찰하여 다음과 같은 결과를 얻었다. 1. 치축경사도와 치조골의 높이가 정상일 경우, 치아의 수에 따른 저항중심의 위치는 다음과 같았다. 1) 중절치 2개를 대상으로 한 경우에는 측절치 브라켓의 원심면 부위에 위치하였다. 2) 중절치와 측절치 4개를 대상으로 한 경우에는 측절치와 견치 브라켓 사이 공간의 후방 2/3 부위에 위치하였다. 3) 중절치, 측절치 및 견치 6개를 대상으로 한 경우에는 견치 브라켓 후방 약 3mm 부위로 견치와 제1소구치의 치간부에 위치하였다. 4) 치아의 수가 증가할수록 저항중심은 후방으로 이동하였다. 특히 4전치군 보다는 6전치군에서 후방 이동량이 크게 나타났다. 2. 절치의 순측 경사도가 증가할수록 저항중심은 후방으로 이동하였다. 3. 치조골의 흡수량이 증가할수록 저항중심은 후방으로 이동하였다.

• 구강회복응용과학지
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• 제21권2호
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• pp.105-111
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• 2005

It is essential to establish the suitable position for artificial maxillary anterior teeth, because of not only esthetics, phonetics, mastication, but also optimal position of artificial posterior teeth for the construction of functional and esthetic prostheses. Anatomic landmarks have been used in the arrangement of artificial teeth. Such as incisive papilla and palatal rugae are useful landmarks for positioning occlusal rim and upper anterior artificial teeth because they are relatively stable and to be identified on master cast. Therefore, if average distance between maxillary anterior teeth and landmarks in dentate subjects are measured and applied, appropriate position of occlusal rim can be initially established. In this study, to present a guide to the position of the occlusal rim for upper anterior teeth of edentulous patients, horizontal distance between anatomic landmarks were measured. Maxillary casts were made in 72 Korean dentate subjects. Horizontal distance between central incisor and incisive papilla, between incisive papilla and intercanine line, and between primary palatine rugae and gingival margin of canine were measured on each cast. The results of this study were as follows ; 1. The mean distance from the incisal edge of central incisor to the posterior border of incisive papilla was 12.1 mm (Male 12.2 mm, Female 11.9 mm). 2. The mean distance between posterior border of incisive papilla and intercanine line was 3.5 mm (Male 3.4 mm, Female 3.6 mm / Left 3.6 mm, Right 3.4 mm). 3. The mean distance from the palatal gingival margin of canine to the lateral border of primary palatine rugae was 2.4 mm (Male 2.4 mm, Female 2.4 mm / Left 2.4 mm, Right 2.3 mm). 4. On all measured items, there were no significant differencies in measured values between male and female, and between left and right sides. (P>0.05).

• 대한소아치과학회지
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• 제37권1호
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• pp.91-96
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• 2010

많은 연구에서, 유치와 그 계승 영구치의 선천적 결손 간에는 상당한 연관관계가 있는 것을 보고하였다. 그러나 하악 전치부에서, 유치의 선천적 결손에도 불구하고, 그 계승 영구치는 정상적으로 존재하는 증례가 임상적으로 종종 관찰되기도 한다. 본 연구의 목적은 한국 어린이에서 하악 유절치와 그 계승 영구치의 선천적 결손 간의 상호 연관관계를 평가하는 데에 있다. 2005년 1월 1일부터 2008년 9월 5일까지 서울대학교치과병원에 내원하여 파노라마 방사선사진을 촬영한 6세 이하의 남녀 어린이 총 14,307명을 대상으로 하악 전치부의 치아양상을 관찰하여 유치와 영구치의 선천적 결손 관계를 평가하여 다음과 같은 결과를 얻었다. 1. 하악 유절치의 결손률은 0.24%였으며, 하악 유절치가 존재 시 후속 영구치가 존재할 승산(odds)은 7163.5였으며, 유절치의 결손시 후속 영구절치가 존재할 승산(odds) 0.79였다. 2. 하악 유절치 결손의 증례 중 후속 영구치가 모두 존재하는 경우는 44.12%였다. 유절치의 양측 결손 시 후속 영구치가 하나라도 존재할 승산(odds)은 유절치 편측 결손 시에 비하여 1.57 배였다. 3. 유절치 결손이 있을 때 유절치의 편측 결손일 승산(odds)은 여자가 남자에 비해 2.2 배였다. 또한, 유절치 결손이 있을 때 후속 영구절치가 존재할 승산(odds)은 남자가 여자의 경우에 비하여 2.22 배였다.

• Restorative Dentistry and Endodontics
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• 제7권1호
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• pp.33-40
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• 1981

The more civilized, the more incidence had happened in our daily life, particularly in industrial factories, by traffic accident, and in sports, etc. in the dental field. The accidental trauma is usually involved the teeth and surronuding tissues. And the author intended to study of the traumatic injuries of anterior teeth by individual tooth, age, sex, cause of trauma, and how they were treated. The following results were obtained: 1. The patients with traumatic injuries of the anterior teeth were 1.8% among the total dental out-patients. 2. By the age group, the twenties was most frequent in both sexes, and the teenagers next. 3. The predominant causes of traumatic injuries in the dental field were traffic accident (23.4%), fighting (19.2%), falling (18.5%), and sports (7.3%). 4. In the classification of injuries of the teeth, uncomplicated crown fractures (31.2%), subluxations (14.7%), and the complicated crown fractures (13.2%) were presented. 5. By the individual tooth in the traumatic cases, the upper cental incisors were most frequently injuried (49.8%). 6. In the treatments fillings and endodontic treatments (33.2%), splints (13.5%), extractions (11.7%) were main after care method.

• Journal of Periodontal and Implant Science
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• 제38권sup2호
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• pp.405-412
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• 2008

Purpose: Pathologic tooth migration (PTM) commonly occurs in the anterior region and is associated with periodontal disease. The treatment of PTM of anterior teeth can be complex and time consuming, and a multidisciplinary approach is often required. Materials and Methods: The patient was a 38-year-old woman with a chief complaint of saving and realigning her elongated maxillary left central incisor. This paper describes the successful combined periodontal regenerative (guided tissue regeneration) and prosthetic treatment and a 2-year follow-up of maxillary central incisor with pathologic tooth migration, deep intrabony defect, and poor prognosis. Results: The right maxillary central incisor was restored by laminate veneer and the left by all-ceramic crown. The patient had no pain and discomfort and was satisfied with the outcomes of her treatment for 2 years. She has maintained her recall program at the Department of Periodontology at 3 months interval. Conclusion: The key step in the successful treatment of PTM in anterior region is to obtain a high level of cooperation from the patient. Maintenance of the treatment result of PTM is dependent on the continuous preservation of periodontal health.

• 대한소아치과학회지
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• 제36권1호
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• pp.78-83
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• 2009

심한 치아 우식증, 외상, 발육성 결함으로 인한 근관치료 및 광범위한 수복이 필요한 소아, 청소년 시기의 유전치 및 영구 전치부 치료는 소아치과 의사에게 어려운 문제이다. 전치부에 사용되어온 기존의 수복 방법은 치질 손상이 광범위한 경우 유지력과 심미적 한계를 가지고 있으며, 특히 청소년기에 영구 전치를 수복할 경우 심미성과 유지력 뿐 아니라 성장 완료 후 영구 보철물 수복을 위한 전 준비 단계를 고려해야 한다. 본 증례는 소아, 청소년기의 광범위한 전치부 치관 손상에서 섬유 강화형 포스트를 이용하여 심미적 수복을 시도하였으며 양호한 결과를 얻을 수 있었다.

• 대한치과의사협회지
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• 제56권4호
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• pp.208-216
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• 2018

Patients with malocclusion may present with preexisting mucogingival problems susceptible to attachment loss during or after orthodontic treatment. Lower anterior teeth especially show a high prevalence of gingival recession following orthodontic treatment. This case report demonstrates hard tissue augmentation of labially thin or deficient alveolar bone (dehiscences and fenestrations) to prevent attachment loss during or after orthodontic treatment. Three patients presented clinically prominent root surfaces and dehiscences and fenestrations on cone-beam computed tomography (CBCT) in lower anterior teeth. Labial hard tissue augmentation of lower anterior teeth was performed with deproteinized bovine bone mineral and collagen membrane. Six months later, hard tissue augmentation reduced root prominence and created a greater volume of hard tissue on lower anterior area in clinical and radiographic findings. Hard tissue augmentation using xenograft could prevent attachment loss associated with orthodontic treatment and maintain stability of healthy periodontium.

• 대한소아치과학회지
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• 제7권1호
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• pp.41-45
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• 1980

The term "Oligodontia" or "Hypodontia" have been used to describe variable degrees of reduction in number of teeth. Oligodontia may occur alone or as a result of some syndrome. Although the teeth are derived in part from ectoderm, the current opinion of reason of oligodontia should be reserved for those disorders in which there is abnormal development of one or more ectodermal tissues. 7 year 5 months old female was refered to the department of pedodontics, college of dentistry Yonsei university for evaluation and replacement of absent teeth. She had no special inf.ectious disease in her childhood, and her parents were healthy. She had no special syndrome of ectodermal disorders except the saddle nose, yellow and fine hair, and notched upper anterior central incisor. Panex radiogram was showing 6 anterior primary teeth, 2 permanent first molars and 2 unerupted first bicuspid in mandible. Another permanent teeth were absent. and normal number of primary and permanent teeth in maxilla. Lateral cephalogram showed no special abnormality in growth pattern. We had evaluated lower anterior decayed teeth with jacket resin and chrome steel crown and removable partial denture at missing area. We had got good results for rehabilitation of function and aesthetic.