• The korean journal of orthodontics
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• v.29 no.5 s.76
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• pp.589-597
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• 1999

The purpose of this study was to evaluate the effects of fluoride releasing orthodontic sealants, light-cured (Group L1&L2) and self-cured (Group S1&S2) $FluoroBond^{\circledR}$, on enamel microhardness under artificial carious solution in vitro.112 extracted human premolar teeth were collected for experiments and divided into seven groups. A Tukon microhardness tester equipped with a Knoop diamond indenter was employed to determine microhardness. Tukon 23 program converted the number of microhardness into KHN (Knoop hardness number). The results were as follows: 1. The microhardness of enamel depth of all groups were the least at the depth of $50{\mu}m$ and that of all groups except L2 group, the greatest at the depth of $200{\mu}m$, were the greatest at the depth of $300{\mu}m$. And as the enamel depth of all groups except L2 and S2 group increased, the microhardness value also increased. 2. There was a little preventive effect in enamel decalcification both light-and self-cured orthodontic sealant groups, but had no statistical significance between the groups(p>0.05). 3. Light-cured orthodontic sealant groups had a progressive inhibiting effect in enamel decalcification at the depth of $100{\mu}m,150{\mu}m,\;and\;200{\mu}m$ (p<0.05). 4. Self-cured orthodontic sealant groups had a progressive inhibiting effect in enamel decalcification at the depth of $150{\mu}m$ (p<0.05). 5. There was no difference of the anti-enamel demineralization effect between light- and self-cured orthodontic sealant groups (p>0.05).

• Journal of dental hygiene science
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• v.11 no.6
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• pp.489-495
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• 2011

The present study was designed to grasp the oral health behavior practice levels and PHP index and gingival index of orthodontic patients' orthodontic related characteristics. A survey and oral examination were conducted for 206 orthodontic patients with fixed appliances. The collected data were analyzed with a t-test, one way ANOVA and stepwise multiple regression. Women were higher than men of the toothbrushing parts(p<0.05), toothbrushing frequency(p=0.001) and use of more oral hygiene products(p<0.01). As for the use of more oral hygiene products practice, it has higher when experience of more education(p<0.05), toothbrushing method practice difference when it comes to age(p<0.05). As for toothbrushing times, difference was purpose of orthodontics(p<0.05) and period of orthodontics(p<0.05) and orthodontics equipment(p<0.05). As for orthodontic equipment, conventional-ligating bracket high score compared to the self-ligating bracket with Buccal PHP index(p<0.001) and gingival index(p<0.05). The factors with lowest possible Buccal PHP index; when age is greater(p<0.05), toothbrushing method practice is higher(p<0.001) and when patients have self-ligating bracket(p<0.001). Education for the orthodontic patients on the oral health behavior practice should be carried out structurally to the group of patients who are 17 years old or younger, to the group with conventional-ligating bracket and to the men. Moreover, it is critical to ensure that there won't be oral health problem during on orthodontic period.

• Journal of the korean academy of Pediatric Dentistry
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• v.34 no.3
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• pp.481-489
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• 2007

Maxillary canine impaction is a frequently encountered clinical problem, and it may cause the resorption of adjacent tooth or cystic change. Treatment plan for maxillary canine impaction should be decided among extraction, orthodontic traction and autotransplantation according to several factors such as direction and position of unerupted tooth, degree of developing root apex, eruption space, exsitance of supernumerary tooth, odontoma, or cyst. Autotransplantation is a valuable alternative to extraction of impacted teeth, where surgical exposure and subsequent orthodontic realignment are difficult or impossible due to unfavorable impaction position. And its prognosis is dependent on a number of factors such as preservation of periodontal ligament, degree of root development, surgical technique, patient's age, endodontic treatment, time and type of splinting and storage medium, etc. The patients in these cases visited our dental clinic in the late permanent dentition with the chief complaint of unerupted maxillary canines. And it was thought that the spontaneous eruption guidance or orthodontic traction and alignment were difficult because of its unfavorable impacted position. Therefore, autotransplantaion and endodontic treatment were done and have been checked periodically until now.

• Proceedings of the Korean Society of Computer Information Conference
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• 2019.07a
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• pp.141-142
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• 2019

본 논문에서는 현대사회에서 스마트 폰 보급의 활성화와 좋지 않은 자세로 오래 앉아 있는 학생들이 자가적으로 척추 측만증을 진단하여 스스로 인지하게 하는 것이 목표이다. 척추측만증은 통증이 나타나지 않아 질병으로인해 병원에서 진료받지 않으면 자가적으로 판단하기 어려울 뿐만 아니라 방치하면 추간판 탈출증 등 여러 척추 질환에 노출 되기 쉽다. 질환을 예방 하기 위해 자이로 센서와 균형센서를 이용하여 집이나 재활트레이닝 센터 및 학교 등에서 자가적으로 판단을 할 수 있다. 센서를 통한 자가적인 진단 정보는 휴대폰의 어플리케이션으로 전달되어 척추 측만증의 정도를 알 수 있고 그에 따른 운동방법이나 자세 교정 방법등을 알려주고 운동 프로그램을 설계하는 시스템을 개발하는데 목적이 있는 연구이다.

• Journal of the korean academy of Pediatric Dentistry
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• v.34 no.3
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• pp.498-505
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• 2007

Management options for impacted maxillary canines can include (1) continued observation, (2) extraction of the primary canine to aid spontaneous eruption, (3) uncovering and bonding of the impacted tooth and its eruption using orthodontic traction, (4) autotransplantation, and (5) extraction followed by prosthetic replacement. Autotransplantation should be considered when the degree of malposition is too severe to correct by orthodontic alignment. The present report describes the management of an ectopic eruption of the left maxillary canine in an 10-year-old girl. The treatment included the extraction of primary maxillary left canine and the autotransplantation using a Rapid Prototyping model. By using RP model to contour the recipient bone and check for fitting in the prepared socket, the extra-oral time can reduce. The autotransplanted canine showed mobility within normal limit, negative response to percussion and positive to electric pulp test after 6 months.

• Journal of the korean academy of Pediatric Dentistry
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• v.32 no.2
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• pp.278-283
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• 2005

Impaction of mandibular canine is not common, and transmigration of mandibular canine is rare. Treatment of impacted canine can be removal of physical obstacle and periodic observation, surgical exposure of impacted tooth and orthodontic traction, autotransplantation, surgical extraction. Management of impacted canine depends on existence of physical obstacle, position and direction of impacted tooth, space available for canine eruption, stage of root development. Of the two case in this report, one case involved impaction of lower canine with odontoma and dentigerous cyst that is treated by surgical exposure and orthodontic traction. The other case involved transmigration of lower canine with supernumerary teeth. It was thought difficult to treat only by orthodontic treatment, so the impacted canine was transplanted to its normal position and orthodontic treatment was conducted.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.19 no.4
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• pp.377-382
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• 1997

Miniplate의 사용은 Champy등의 보고 이후 구강외과 영역에 있어서 외상 혹은 악교정수술등 많은 분야에 이용되기 시작했다. 전통적인 악간고정 방법에 비해 miniplate는 사용하기 쉽고, 정확한 해부학적 정복 및 고정을 가능케 하며 결과적으로 빠른 치유를 가능케 한다는 장점들을 갖고 있다. 그러나 감염, wound dehiscence, 부식, 나사의 헐거워짐, 주위조직의 변색 그리고 stress shielding effect등의 후유증들이 보고되어 왔으며 가장 무해한 금속이라고 알려진 titanium 또한 주위조직 및 lung, spleen, liver 그리고 kidney 등과 같은 조직으로 metal을 전이시키는 것으로 보고되고 있다. 특히 안와골 주변과 같은 상부 연조직이 얇은 곳에 miniplate를 사용할 경우 miniplate가 만져지거나 보일수도 있다는 점이 보고되었으며 따라서 술후 사용되었던 miniplate를 제거 해야만 할 것인가가 또한 주된 관심사로 보고되고 있다. 이에 저자는 이러한 금속성 miniplate의 단점을 개선하고자 자가 두개골을 이용한 플레이트를 고안하였다. '자가 두개골 플레이트'의 적응증은, enophthalmos 개선의 목적으로 두개골을 채취해 임플란트로 사용하는, enophthalmos를 동반한 관골 및 안와골의 복합골절환자에 있어 두개골의 추가채취가 가능한 경우가 될 수 있겠다. 자가 두개골을 이용해 플레이트를 고안하려고 본 증례에서의 시도는 구강외과 영역에 있어서 자가 두개골이 골편이 고정재료로도 쓰일 수 있다는 가능성을 보여주었다는 점에서 의미가 있다고 저자는 생각한다.

• The Journal of Korean Association of Computer Education
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• v.18 no.4
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• pp.11-18
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• 2015

A person with defects and the lack of hearing, has very difficult problems to listen to the sound of conversation or environment, and these problems cause wrong directions in the linguistic sense and character. We designed and implemented an application to practice and correct pronunciation of a hearing-impaired person specially. This is made as a mobile app without the limitation of time and space, and this provides practices with the level of difficulty in learning of pronunciation, taking into consideration of remedial status in pronunciation. The hearing-impaired person can train the basic pronunciation and the word pronunciation. He or she can practice basic skills in pronunciation and check the record on the practice rate and the success rate. Also, the person can improve pronunciation by self-correction function using the front camera of a smart phone.

• 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 Pediatric Dentistry
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• v.27 no.4
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• pp.564-572
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• 2000

We decided among extraction, orthodontic traction and autotransplantation such as direction and position of unerupted tooth, degree of developing root apex, eruption space, being of supernumerary tooth or odontoma or cyst when tooth impacted. Autotransplantation is considered when orthodontic traction is unrealistic or when tooth movement can absorb root of neighbor tooth. The prognosis for successful autotransplantation is dependent on a number of factors such as root development, surgical technique, patient's age, endodontic treatment, time and type of splinting, preservation of periodontal ligament and storage medium. Especially when severe osseous defect is being, bone graft considered for reducing of mobility and for assisting recovery. In all cases, chief complaint is unerupted tooth and various causing factors were supernumerary, odontoma, ectopia and so on. Before autotransplantation, space regaining was done if needed and demineralized freezed dried bone and autogenous bone graft was done when there is severe osseous defect by extraction of supernumerary tooth or odontoma. Splinting was removed after 2-3weeks At 3-4weeks after autotransplantation, endodontic treatment was decided. At follow up check, normal recovery was done and there was no inflammatory or replacement root resorption in periapical radiograph.