• The korean journal of orthodontics
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• v.27 no.4 s.63
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• pp.661-668
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• 1997

There is a variation in the range of normal occlusion, and we must fit our treatment to the needs of each patient. If the upper or lower incisors are congenital)y missing, malformed, or crowded, the extraction of the incisor has some advantages over the extraction of premolars and nonextractions. The advantages are 1)simple mechanics, 2)reduced treatment time, 3)less relapse tendency, and 4)fewer facial profile changes. In order to decide which incisor should be extracted, we must consider certain factors 1)discrepancies in anterior arch length, 2)anterior tooth ratio, 3)periodontal and tooth health condition, and 4)the relationship between the upper and lower midline. Diagnostic set-up can be helpful to plan the treatment and show us the post treatment result.

• The korean journal of orthodontics
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• v.38 no.1
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• pp.60-67
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• 2008

Treatment of adult patients with Class III malocclusion frequently requires a combined orthodontic and surgical approach. However, if for various reasons, nonsurgical orthodontic treatment is chosen, a stable outcome requires careful consideration of the patient's biologic limitation. This case presents the orthodontic treatment of an adult with a Class III malocclusion, which was treated nonsurgically using indirect skeletal anchorage.

• Journal of the Korean Academy of Esthetic Dentistry
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• v.28 no.2
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• pp.86-94
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• 2019

Tooth impaction make various problems which are pathologic changes, functional defect and esthetic troubles. Sometimes impacted tooth are extracted. But surgical exposure of impacted tooth and orthodontic forced eruption are usually used a lot to solve these problems. Impacted tooth for orthodontic treatment has two impacted patterns 1) Simple impaction outside alveolar bone covered soft tissue, 2) Fully impaction under alveloar bone. So I introduce way to exposure of impacted tooth for orthodontic treatment with various cases and literatures.

• Journal of the korean academy of Pediatric Dentistry
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• v.46 no.4
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• pp.422-432
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• 2019

Treatment options for impacted permanent molars include orthodontic traction, surgical repositioning, transplantation, and extraction of the impacted teeth. Orthodontic traction is recommended because it is the most conservative method. However, it has limitations, such as loss of tooth anchorage. In an effort to overcome these limitations, skeletal anchorage devices tailored for orthodontic use were developed. In this case report, 3 patients were diagnosed with impacted permanent molars. The impacted teeth of these patients were surgically exposed, the orthodontic devices were attached, and the skeletal anchorage devices were implanted for the successful traction of the impacted teeth.

• Journal of the Korean Academy of Esthetic Dentistry
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• v.9 no.1
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• pp.38-41
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• 2000

There are clinical cases that always give us trouble in our daily practice. But, those kind of difficulties may be from our intradisciplinary approach not from interdisciplinary approach. Many dentists are getting good results from interdisciplinary treatments, involving periodontics, operative dentistry and prosthodontics. But, the orthodontics is the discipline can't be missed to the dentists trying to esthetic treatment. Here, I'd like to share the following cases because I couldn't get esthetic outcomes if there was no orthodontic involvement, with periodontics, operative dentistry and prosthodontics.

• The Journal of the Korean dental association
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• v.30 no.3 s.274
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• pp.237-241
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• 1992

이번 학술 대회에서는 Orthopedic force에 많은 관심이 주어졌으며 Growth Development및 기초 의학 분야의 연구가 한층 눈에 띄었다. 그리스 국제교정학회는 2회로써 이제 발전 초기단계이다. 우리와 학술 교류가 거의 없는 이곳 동구권 국가들과 많은 왕래가 있음으로써 국인 신장 및 학문 발전에 도움이 되리라고 생각한다.

• Proceedings of the KAIS Fall Conference
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• 2009.05a
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• pp.109-113
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• 2009

이 연구는 교정치료중인 환자의 구강건강영향지수(OHIP)와 자아존중감에 영향을 미치는 요인을 파악하기 위해 대구시내에 소재한 교정 전문치과 4곳에서 교정치료를 받고있는 환자 200명을 대상으로 설문지 조사방법을 이용하여 대상자의 일반적 특성 및 교정치료 특성, 구강건강영향지수, 자아존중감을 조사 분석하여 교정치료환자의 구강건강영향지수 및 자아존중감에 영향을 미치는 요인을 분석하였다. 그 결과, OHIP에 영향을 미치는 요인으로는 연령이 낮을수록(P<0.01), 구강건강상태가 좋을수록(P<0.001), 가족의 권유로 교정치료 받는사람이(P<0.05), OHIP에 영향을 주는 요인으로 분석되었으며, 자아존중감에 영향을 미치는 요인으로는 남자가(P<0.05), 미혼이(P<0.01), 수입이 많을수록(P<0.05), 자아존중감에 영향을 주는 요인으로 나타났다.

• The korean journal of orthodontics
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• v.29 no.2 s.73
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• pp.267-276
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• 1999

Distributions trends were examined in 9159 malocclusion patients who had been examined and diagnosed at Department of Orthodontics, College of Dentistry Yonsei University over a 6 year-period from 1992 to 1997. The results were as follows ; 1. The total number of orthodontic patients in 1997 increased in comparing with that of 1992(86%) and after 1995, the number of annual patients showed an increase. 2. Age distribution had shown over-19 year-old group being the largest(39.9%) but percentages of pre-adolescent patients had been decreasing while that of adult patient had gradually increased. 3. Distributions in the types of malocclusion, the Angle's Classification had shown : 33.3% for Class I, 28.6% for Class II and the largest 38.1% for Class III. 4. Among Class I patients, crowding showed the largest(32.6%) and protrusion group had gradually increased to 33.9% in 1996. Otherwise openbite and crossbite groups tend to decrease, annually. 5. Geographic distribution showed a majority of patients from Seoul(above 70%). Among the patients from Seoul, group within the distance 3-6Km from Yonsei dental hospital was the largest(32.3%) and group within 9Km showed 69% of total patients.

• Journal of Dental Rehabilitation and Applied Science
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• v.36 no.4
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• pp.262-271
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• 2020

To restore a tooth with a fracture line extending below the marginal bone level, a surgical crown lengthening procedure accompanied by ostectomy could be considered to expose the fracture line and reestablish the biologic width. However, this procedure could lead to esthetic failure, especially in the anterior teeth. Therefore, orthodontic extrusion, which elevates the fracture line from within the alveolar socket without sacrificing the supporting bone and gingiva, is recommended. This technique allows for the proper placement of the crown on a sound tooth structure, with the reestablishment of the biologic width. Alternatively, surgical extrusion is an one-step procedure that is simpler and less time-consuming than orthodontic extrusion; placing and adjusting the orthodontic appliance does not require multiple visits. This study presents successful restoration in 2 cases with a crown-tooth root fracture of the maxillary central incisor treated using a multidisciplinary approach through orthodontic extrusion or surgical extrusion followed by successful restoration.

• Journal of Digital Convergence
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• v.17 no.9
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• pp.185-192
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• 2019

The introduction of smart technology provides accuracy, safety, and efficiency to both physicians and patients. Although interest in a clear aligner is increasing among users worldwide, the current clear aligner requires a visit to the hospital every one or two weeks for replacement, which is a very cumbersome process. There is also confusion among dentists and patients because about 40 to 80 devices are made, and calibration is done based on the order and duration of the clear aligner. Therefore, this study designed and developed a clear aligner management system so that communication between the patient and dentist can be smoothly performed by inserting the QR code into the transparent correction device. As a result, the size of the QR code was recognized as $6{\ast}6mm^2$ which can be used in the oral and the recognition distance was 100% within 12 cm. Since the dentist can remotely manage the patient with the proposed system and improve the correction effect, it is possible to manage patients abroad, as well as domestically.