• The korean journal of orthodontics
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• v.38 no.5
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• pp.347-357
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• 2008

Objective: The purpose of this study was to examine the effect of ipriflavone on periodontal reorganization and prevention of relapse following tooth movement. Methods: Orthodontic rubber bands were inserted between the first and second maxillary molars of 27 white male rats for 3 weeks for experimental tooth movement. From one day before the removal of orthodontic rubber band, ipriflavone was administered 50 or 400 mg/kg daily in each experimental group whereas carboxymethyl cellulose solution was administered in the control group. They were sacrificed at the 5, 10, and 15th day from the day of removal of orthodontic rubber bands. The amount of relapse was evaluated by measuring the interdental space, and the extent of periodontal reorganization was compared through histological examination. Results: In case of ipriflavone administration, the amount and velocity of relapse was less and slower compared to the control group. In addition, the ipriflavone group showed more rapid periodontal reorganization compared to the control group. Conclusions: The results of the present study suggest that ipriflavone administration can be used effectively in the prevention of relapse following orthodontic tooth movement through the acceleration of periodontal reorganization.

• 대한치과교정학회:학술대회논문집
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• 2005.11a
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• pp.153.1-153.1
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• 2005

• Journal of Veterinary Clinics
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• v.33 no.1
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• pp.25-29
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• 2016

Three Maltese dogs, 5 to 7 months old, were admitted to the Veterinary Medical Teaching Hospital, Chonnam National University with malocclusion including Class IV mesiodistocclusion. In the first case, the treatment was performed by moving the mandibular canine teeth caudally with orthodontic buttons and Masel chains. The second patient was treated for rostroverted mandibular canines using buttons and chains. When distal movement of the mandibular canine teeth was completed, a maxillary arch wire with finger springs was applied to push the incisor teeth forward. In the third case, the treatment began by moving the mandibular canine teeth caudally with buttons and chains. An arch wire with finger springs was applied at maxilla to move the maxillary incisor teeth labially. Additionally, the mandibular incisor teeth were moved lingually by an elastic band attached to the buttons cemented to mandibular canine teeth. As a result, all patients successfully regained a normal occlusion.

• The korean journal of orthodontics
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• v.39 no.6
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• pp.372-382
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• 2009

Objective: This study was to change of pulp blood flow among maxillary and mandibular anterior tooth with mild crowding and adjacent teeth using Ultrasound Doppler graphy. Methods: The change of pulp blood flow was measured three times using Ultrasound Doppler graphy; before the attachment of brackets, after 3 week, and after 6 week. The sample consists of 15 year old eighteen patients. Results: Before the attachment of brackets, after 3 weeks, and after 6 weeks, there were no significant differences in the change of pulp blood flow in each part (maxilla and mandible) and each tooth according to period. In addition, to compare internal dangerousness of loss of the pulp vitality, when pulp blood flow is compared in each tooth before orthodontic treatment, there were no statistically significant differences in maxillary lateral incisor and mandibular canine but it showed low values in all measurement items (p > 0.05). Conclusions: Results of this study can be not only methodological preliminary data in further study such as tooth movement type of Ultrasound Doppler graphy and particular study considered the patient age, but also reference materials for the loss of pulp vitality in orthodontic treatment.

• 대한치과교정학회:학술대회논문집
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• 2002.11a
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• pp.29.1-29.1
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• 2002

• The korean journal of orthodontics
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• v.36 no.1 s.114
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• pp.30-44
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• 2006

This study was performed to investigate the location of the ideal bracket positioning plane in lingual orthodontics using the three-dimensional finite element method. Displacement of the anterior teeth were evaluated according to the vertical and the angular movements of the bracket positioning plane. To achieve the ideal movement of anterior teeth in the lingual central plane, the location of the force application point and the amount of the moment applied to the four incisors were evaluated. As the bracket positioning plane was moved parallel toward the incisal edge, uncontrolled tipping and extrusion of the maxillary and the mandibular incisors were increased. But lingual tipping of the crown was decreased in the maxillary and the mandibular canines. As the bracket positioning plane was inclined toward the incisal edge, lingual tipping was increased in the 6 anterior teeth and extrusion of incisors and intrusion of the canine was also increased. As the retraction hook of the canine bracket was elongated, lingual tipping and extrusion of the central incisor and mesial movement and extrusion of the lateral incisor were increased. In the canine, mesial and labial movements of the crown were increased. When the moment was applied to the 4 incisors of the maxillary and the mandibular arch in the lingual central plane, 280 gf-mm in the maxillary central incisor, 500 gf-mm in the maxillary lateral incisor, 170 gf-mm in the mandibular central incisor and 370 gf-mm in the mandibular lateral incisor produced bodily movement of the individual tooth.

• The Journal of the Korean dental association
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• v.34 no.10 s.329
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• pp.695-698
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• 1996

• The korean journal of orthodontics
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• v.29 no.5 s.76
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• pp.551-562
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• 1999

This study was undertaken to investigate the relation between orthodontic force magnitude and the amount of tooth movement. And more light force application for reducing root resorption Twenty-four rats were divided into three experimental groups(A, B, C) based on force magnitude and application method. Springs of 50g force were applied to A group, springs of 100g force were applied to B group and springs of 25g force were applied to C group initially, and after 4 days springs of C group were changed to springs of 50g force. Two kinds of $sentally^{(R)}$(GAC U.S.A.) closed coil spring, 50g and 100g, were used. And we made 25g springs by heat treatment process of 50g springs. Each spring was inserted between the maxillary central incisor and the maxillary left first molar. Amounts of tooth movement were measured everyday by digital caliper($Digimatic^{(R)}$, Mitutoyo, Japan) under inhalation anesthesia for 15 days. After 15 days, all rats were sacrificed and histological samples were obtained with Hematoxyline-Eosin stain and Masson's trichrome stain. Following conclusion were made; 1. Group B showed the mean cumulative tooth movement of $2.19{\pm}0.41mm$ at 15th day, which was greatest among three groups, followed by group C($2.06{\pm}0.10mm$), group A($1.90{\pm}0.49mm$) respectively. however, there was no statistically difference among three groups. 2. All groups showed general tooth movement pattern and A, B, C group finished lag phase at 9th, 8th, 7th day, but there was no statistical significance. 3. Group A,B,C showed root resorption and especially group B showed the most severe root resorption and group C showed milder root resorption than other groups. According to the above results, large initial force with the development of a flirty widespread hyalinized zone may cause severe root resorption, so initial force should be applied lightly to reduce hyalinized area and eventually root resorption and then increased force will induce efficient tooth movement.

• The korean journal of orthodontics
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• v.35 no.2 s.109
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• pp.153-161
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• 2005

Tooth movement facilitated by corticotomy and distraction osteoseresis was discussed. In this study, a portion of cortical bone which can provide resistance to tooth movement in alveolar bone was removed Active bone deposition was thor Possible in the tension side. Teeth moved at such a speedy rate as we could not imagine from conventional orthodontic treatment. which lead to the reduction of the total treatment Period Posterior movement of the canine or molar teeth was possible without any side effects such as anchorage loss, root resorption or Periodontal breakdown.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06c
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• pp.350-352
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• 2012

최근 의료 분야 소프트웨어가 발전함에 따라 3차원 가상 모델을 이용한 의료 소프트웨어의 개발도 꾸준히 증가하는 추세이다. 치열 교정 분야는 이러한 3차원 가상 모델을 적용할 수 있는 분야 중 하나이다. 치열교정 분야에서는 3차원 가상 모델을 이용하여 부정 교합 환자의 치료 초기부터 끝까지 여러 단계의 치아이동 과정을 제공한다. 치아 이동의 각 단계별로 Stereolithographic Model이 만들어지는데, 이는 투명하고 얇은 Overlay 장치를 제작하는 기초가 된다. 투명한 재질의 Overlay 장치는 심미적이고 사용이 간편하여 많은 환자들이 선호하고 있다. Overlay 장치를 제작하는 시스템을 구축한 회사로는 Invisalign System이 가장 대표적이다. Invisalign System은 미국에 본사를 둔 회사로 한국에 지사를 두고 적극적인 마케팅을 통해 3D 치열 교정 분야의 국내시장을 거의 독점하고 있다. 독점적이다 보니 비용이 다른 교정 치료보다 2배 가까이 들고 있지만, 현재 한국에서는 개발이 적극적으로 이루어지지 않는 실정이다. 이에 본 논문에서는 환자 치아의 정확하고 과학적인 진단자료를 얻어 높은 치료비용에 대한 개선과 치료 전 과정에 대한 시뮬레이션 및 Stereolithographic Model을 미리 환자에게 제공하여 만족도를 높일 수 있는 3D치열 교정 시스템을 제안한다.