• 대한치과교정학회지
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• 제38권1호
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• pp.60-67
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• 2008

성인에서의 골격성 III급 부정교합의 치료의 원칙은 하악골의 후방이동을 동반한 수술적 교정치료이나, 다양한 문제로 인해 수술적 방법을 선택하기 어렵고 부조화의 정도가 심하지 않은 환자의 경우 비수술적 절충 치료를 선택할 수 있다. 비수술적 절충치료를 시행하는 경우 교정치료의 한계와 치주적인 부분에 대한 주의가 필요하다. 본 교실에서는 간접 골성 고정원을 이용하여 성인에서의 골격성 III급 부정교합을 비수술적으로 절충 치료 하였기에 보고하고자 한다.

• 대한소아치과학회지
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• 제25권3호
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• pp.604-612
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• 1998

The majority of Class III malocclusion have maxillary retrusion. Thus, it becomes obvious that management of most skeletal Class III malocclusion cases should include maxillary protraction as major objective. Additionally, in Class III malocclusion with posterior crossbite, RME "disarticulates" the maxilla and initiates cellular response in the sutures, allowing a more positive reaction to protraction forces. Using facemask with RME helped in correction of skeletal Class III malocclusion by the anterior displacement of maxilla and maxillary dentition, and changing the direction of the growth of mandible. Thus, acceptable improvement in the Class III profile was performed.

• 대한치과교정학회지
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• 제25권3호
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• pp.299-310
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• 1995

이 연구의 목적은 교정치료시 제2대구치의 위치변화를 알아보기 위함이다. 이를 위하여 제1대구치까지 banding하여 교정치료를 완료한 성인환자 64명을 Class I 발치군 15명, Class I 비발치군 12명, Class II 13명, Class III 14명으로 4개의 군으로 분류하고 치료전후의 두부방사선 계측사진을 분석하였다. 이 연구로부터 얻어진 결과는 다음과 같다. 1. Class I 발치군에서 하악 제2대구치는 제1대구치보다 적은 정출과 더 많은 원심경사를 보였고, 상악 제2대구치는 제1대구치와 유사한 정출과 근심경사를 보였다. 2. Class I 발치군에서 하악 제2대구치는 제1대구치에 비해 함입되고 유사한 원심경사를 보였으며, 상악 제2대구치는 제1대구치와 비슷하게 정출되었다. 3. Class II군에서 하악 제2대구치는 제1대구치에 비해 적은 정출을 보였고, 상악 제2대구치는 제1대구치보다 많은 정출을 보였다. 4. Class III군에서 하악 제2대구치는 제1대구치와 유사한 정출과 더 많은 원심경사를 보였으며, 상악 제2대구치는 제1대구치에 비해 적은 정출을 보였다. 5. 제2대구치 위치변화에 대한 각 군간의 비교시 FH plane에서 상악 제2대구치 치근 분기점까지 거리 변화는 Class I 발치군과 Class II, Class I 발치군과 Class III군에서 차이를 보였으며, 구개평면과 교합평면에 대한 상악 제2대구치의 각도 변화는 Class I 발치군과 Class III군에서 차이를 보였으며, 하악평면에 하악 제2대구치 치근분기점까지 거리변화는 Class I 발치군과 비발치군, Class I 비발치군과 Class II군, Class I 비발치군과 Class III군에서 차이를 보였으며, 하악 평면과 교합평면에 대한 하악 제2대구치의 각도 변화는 각 군간에 차이를 보이지 않았다.

• 대한구순구개열학회지
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• 제6권2호
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• pp.59-67
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• 2003

A cephalometric study was performed to reveal differences between skeletal Class III malocclusion patients and cleft lip and palate patients, The material for this study consisted of 16 males (mean age 19.8, range 17-29) and 9 females(mean age 19.4, range 16-27) with cleft lip and palate, and 222 Skeletal Class III malocclusion patients(males 106, females 116), Cephalometric tracing and measurements were done by one investigator. Results were followed: 1. Cleft lip and palate group had more retrusive maxilla than the skeletal Class III malocclusion group. 2, Cleft lip and palate group had smaller effective maxillary and mandibular length than skeletal Class III malocclusion group, and the difference was more prominent in the mandible than in the maxilla. 3. Dental compensation was not observed in the upper incisors of cleft lip and palate group and in the lower incisors it was smaller than skeletal Class III group. 4, In the Gonial angle and lower anterior facial height values, there was no significant difference between cleft lip and palate and skeletal Class III malocclusion group. These results can be used in orthodontic treatment planning and orthognathic surgery for the cleft lip and palate patients.

• 대한치과교정학회지
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• 제45권6호
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• pp.322-332
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• 2015

A 12-year-old girl was referred to our clinic for evaluation of an unaesthetic dental appearance. All permanent teeth were erupted, while the deciduous maxillary right canine was retained. Cone-beam computed tomography revealed a complete transposition of the maxillary left canine and first premolar involving both the crowns and the roots. Initial cephalometric analysis showed a skeletal Class III pattern, with a slight maxillary retrusion and a compensated proclination of the upper incisors. The patient's teeth were considered to be in the correct position; therefore, we decided to attempt treatment by correcting the transposition and using only orthodontic compensation of the skeletal Class III malocclusion. After 25 months of active orthodontic treatment, the patient had a Class I molar and canine relationship on both sides, with ideal overbite and overjet values. Her profile was improved, her lips were competent, and cephalometric evaluation showed acceptable maxillary and mandibular incisor inclinations. The final panoramic radiograph showed that good root parallelism was achieved. Two-year follow-up intraoral photography showed stable results.

• 대한치과교정학회지
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• 제49권5호
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• pp.338-346
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• 2019

In this report, we describe the successful use of alternate rapid maxillary expansions and constrictions with a hybrid hyrax-mandibular miniplate combination and simultaneous orthodontic treatment for the management of severe Class III malocclusion due to maxillary hypoplasia in an 11-year-old girl. The devices were removed after 20 months of treatment, and the family was instructed about a careful control and retention program that should be followed in accordance with the patient's growth. The final result included the correction of Class III malocclusion with adequate function and excellent facial esthetics, which restored the patient's self-esteem and provided personal motivation. The outcomes showed good stability after 24 months of retention. The decrease in the duration of active treatment is the most important finding from the present case. Considering that facial esthetics in adolescence is a determining factor for the development of a personality and interpersonal relationships, we recommend the use of this protocol for growing patients, who will exhibit not only an improved physical appearance but also a better quality of life.

• Journal of Oral Medicine and Pain
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• 제26권2호
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• pp.147-156
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• 2001

The purpose of this study was to identify the difference of vertical movement of mandible according to Angle's molar relationship and by skeletal factors affect to vertical movement of mandible. 172(age ranged from 20 to 30) subjects who go to college within territory of Kwangju city without any experience of temporomandibular disorder, extraction and orthodontic treatment. were selected for this study. The subjects were classified into class I(male:30, female:49), class II(male:18, female:24) and class III(male:18, female:33) according to Angle's molar relationship. The distance was measured between incisal edge of maxillary and mandibular central incisor and between bottom of central fossa of maxillary and mandibular 1st molar with ruler. The arch length and width were measured on the diagnostic cast. Cephalometrics were taken and then traced. Landmarks were identified and analyzed. 1. Maximal interincisal opening of male is larger than that of female in class I, class II and class III. Among each group maximal interincisal distance is the largest in class III. Maximal intermolar distance of male is superior to that of female in class I, class II, and class III, but there is no siginficant difference among them. 2. On maximal opening movement of Angle's classification class I and class II, total mandibular length, mandibular ramal length, madibular inferior border length and upper arch width were important variables and facial length, upper arch length and lower arch length had negative relationship to that. On maximal opening movement of Angle's class III, the upper arch length, the lower arch length and anterior facial length were important variables especially when compared with class I and II, and upper arch width had negative relationship. These results suggest that maximal opening movement is affected by facial morphology in all classes, but each group is affected by different facial skeletal variables. Accordingly, facioskeletal variables might be considered as diagnosis and treatment to improve the amount of mouth opening.

• 대한치과의사협회지
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• 제46권2호통권465호
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• pp.88-99
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• 2008

In growing patients with Class III malocclusion and midfacial deficiency, the treatment protocol calls for orthopedic maxillary protraction and clinicians choose the facemask therapy generally. But facemask is not esthetic or comfortable to patients because it should be worn extraorally. Consequently it is difficult to obtain patients cooperation, and this often influences the treatment effects negatively. MTA (modified tandem appliance), that is a small intraoral appliance, is carried conveniently and esthetic relatively. So it seemed more patient-friendly than a facemask. While the treatment effect of this is similar to that of a facemask. This report presents skeletal Class III malocclusion two cases treated by MTA with good results.

• 대한치과의사협회지
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• 제57권6호
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• pp.344-351
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• 2019

Skeletal Class III malocclusion is a relatively common form of malocclusion in Korea. In borderline cases where only mild skeletal discrepancy exists and if worsening of the facial profile is expected as a result of premolar extraction, mandibular full arch distalization with miniscrews is the treatment of choice. The purpose of this study was to investigate the pattern of tooth movement and evaluate the stability of mandibular full arch distalization and to identify correlation between stability and factors such as initial skeletal pattern, dental changes during treatment and alveolar bone in symphysis region using lateral cephalograms.

• 치위생과학회지
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• 제20권2호
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• pp.118-124
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• 2020

The purpose of this comparison of case reports is to introduce the results of the application of new devices for the management of growing Class III malocclusions in children. Two 8-year-old boys had a chief complaint of anterior crossbite. Anterior crossbite correction using a tandem traction bow appliance (TTBA) or a Carriere Motion 3D Class III appliance with a Transforce appliance was planned. By comparing cephalometric radiographs before and after treatment, changes in skeletal growth and incisor inclination to the Frankfort horizontal (FH) plane could be measured. Both devices increased SNA and ANB angles, N-I Pg-A, U1 to SN, and U1 to FH. Both appliances improved facial features and resolution of anterior crossbite. The TTBA and Carriere Motion 3D Class III appliance had similar effects when applied as early treatment for growing mesio-occlusions and anterior crossbite in two boys. However, long-term outcome assessments and well-designed comparative studies are still required.