• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제40권2호
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• pp.91-95
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• 2014

The posttraumatic complications of jaw fractures related to jaw function and facial deformity include nonunion, malunion, malocclusion, temporomandibular joint dysfunction and facial asymmetry. This report presents cases referred to our department for revision of malunion and malocclusion following inadequate reduction of jaw fractures. Three patients with posttraumatic malocclusions caused by malunion were treated with a LeFort I osteotomy in one case and re-fracture in two cases. All of the patients exhibited stable results without further complications (e.g., malunion or malocclusion). Accurate preoperative diagnosis and proper anatomical reduction of the fracture segments are essential to preventing post-surgical malunion and malocclusion.

• 대한치과교정학회지
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• 제11권2호
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• pp.101-108
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• 1981

This investigation was designed to compare the calcification degree of maxillary second permanent molar to mandibular second permanent molar in skeletal Class III Malocclusion. The material selected for this study consisted in standand lateral cephalogram study model and orthopantomogram of two hundred fifty seven Korean Children, one hundred twenty one boys and one hundred twenty four girls, aged 6 through 12 years, having skeletal Class III Malocclusion. On the basis of findigs of this study, the following results were obtained 1. In the stage of completion of crown, there was no significant difference in calcification degree between maxillary second molar and mandibular second molar of both boys and girls in skeletal Class III Malocclusion. 2. From 8 years of age at the stage of beginning root formation to 12 years of age, the calcification degree of mandibular second molar was more advanced than Maxillary second molar of both boys and girls in skeletal Class III Malocclusion.

• 대한치과교정학회지
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• 제16권1호
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• pp.35-49
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• 1986

전치개교에 관한 원인과 여러가지 치료법의 장단점을 논의했고 전치개교본태를 객관적으로 이해하는데 강조했다. 진단의 주관적인 해석은 부정교합을 잘못 기술해서 위험한 결과를 흔히 유도하게 된다. 해부학, 생리학, 조직학과 교정기계요법의 역학에 관한 길은 지식을 가진다면 대부분 전치개교치료는 외과적중재 없이 높은 성공율과 안정을 기할 수 있다. 이러한 점에서 지난 20여년동안 임상적으로 정립된 Kim의 MEAW 시술을 설명했으며 전치개교치료증례들이 이 MEAW요법을 입증하는데 제시되었다.

• 대한치과교정학회지
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• 제23권1호
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• pp.57-74
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• 1993

Anterior crossbite is a common malocclusion in the early deciduous dentition. Even today, many these malocclusion patients are not treated until the mixed or permanent dentition. And the purpose here is to emphasize the need for early diagnosis and possible treatment for these anterior crossbite malocclusions and their associated facial patterns. Case histories of 4 patients selected from the author's practice are presented. Different methods of treatment are evaluated. Some improvement was achieved in all patients from an early interceptive regimen, although ultimately corrective orthodontic treatment may still be needed in some. It is concluded that early interception of deciduous anterior crossbite malocclusion should by attempted in patients ; there should be no delemma in reaching such a decision. And it is essential for diagnosis and treatment to determine exact variations in growth when some appliance are used, it is recommended that growth-related records be made as early as possible.

• 대한치과교정학회지
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• 제14권1호
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• pp.33-37
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• 1984

The prevalence of normal occlusion and malocclusion was assessed by Angle's Classification method for 8989 school students at 7-22 years in Seoul. The occurrence of malocclusion and the need-for orthodontic treatment was 61 per cent among them. Results indicated no significant differences between the sexes for the occlusal relationships of the mandible to the maxille. The prevalence of Class I, Class II, and Class III malocclusion in all malocclusion was shown to be Class I, 45.7 per cent; Class II, 7.6 per cent; and Class III, 7.9 per cent. Class II Division 1 was observed to occur four times frequently compared to Class II Division 2 in Class II malocclusions. Class III malocclusion was shown to occur more frequently compared that of Caucasians.

• 대한치과교정학회지
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• 제9권1호
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• pp.105-110
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• 1979

In order to define what the average Class I malocclusion looks like, 72 Class I malocclusions were compared with corresponding measurements from 90 cases of normal occlusion sample. This sample was obtained from the Department of Orthodontics, Infirmary of Seoul National University. 1. SNA, Fac(NP) to SN measurements were significantly different from the normal occlusions and smaller than the normal occlusion means. 2. 'Y' axis to SN, Mandibular plane to SN, $\underline{1}$ to Occlusal plane, $\bar{1}$ to NB(linear) measurements were significantly different from the normal occlusions and larger than the normal occlusions. 3. ANB, Occlusal plane to SN, AB to Occlusal plane, $\underline{1}$ to SN, $\bar{1}$ to SN, $\bar{1}$ to Occlusal plane measurements showed no significant difference between the means.

• 대한소아치과학회지
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• 제23권3호
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• pp.615-623
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• 1996

Face mask is an extraoral appliance which used to protract maxilla, and can help in the correction of moderately severe class IlI malocclusions by the anterior displacement of the maxilla and maxillary dentition, and possibly restricting or changing the direction of the growth of the mandible. In three cases the results were followed. 1. Anterior crossbite was corrected 2. Maxilla & maxillary dentition were displaced forwardly. 3. Lingual tipping of the mandibular incisors, and backward & downward rotation of mandible were performed. 4. Acceptable improvement in the class III profile was performed.

• 대한치과교정학회지
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• 제1권1호
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• pp.33-37
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• 1970

저자들은 III급 부정교합의 가족력이 있는 8세 6개월의 여아를 III급 부정교합의 초기상태에서 조기치료를 시도했고 계속적인 장치의 장착으로서 Growth spurts에 일어날수 있는 하악전돌증의 공적으로부터 이를 방어하고져 시도하였다. Growth spurts로 인한 하악전돌증의 방어를 효과적으로 하기위해서는 chin cap과 extraoral force의 이용도 적절하리라 생각한다.

• 대한치과교정학회지
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• 제16권2호
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• pp.115-122
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• 1986

This study was undertaken to determine the relapse amount in the various malocclusions and correlative coefficient with other factors. The sample were consisted of 60 orthodontic patients whose models were perfect before treatment, after treatment and after 6 months post treatment. For this study 8 liner lengths were measured in maxilla and mandible respectively. The results were as follows. 1. The change with treatment of maxillary dental arch length was most large in non extraction group of Angle's class II malocclusion. 2. The relapse compared with other treatment changes was most little in the arch perimeter. 3. The relapse was increased in proportion to the beginning age of the treatment in non extraction group. 4. The relapse of maxillary intermolar width was increased and those of overbite & molar relationship were decreased in proportion to the duration of active treatment. 5. The relapse of maxillary intercanine width was increased with a time goes after treatment.

• 대한치과교정학회지
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• 제15권2호
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• pp.353-368
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• 1985

This present paper describes 3 clinical cases which were treated with Bioprogressive mechanism. Each patient has shown a deficient maxilla combined with prognathic and steep mandible. The purpose of treatment was planned to obtain the forward growth of maxilla and redirectioning of mandibular growth. The most noteworthy approach in the treatment was the application of Cl III intermaxillary elastics with upper protraction utility arch immediately after rapid maxillary expansion. In the analysis of the data obtained from pre- and post treatment lateral cephalogram, the result achieved by this method is very favolable to the correction of anteroposterior relationship of maxilla and mandible.