• 대한소아치과학회지
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• 제41권3호
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• pp.266-271
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• 2014

본 연구는 어린이의 상순소대 부착위치에 따른 빈도와 치령과의 관련성을 평가하기 위한 목적으로 수행되었다. 2~12세의 어린이 320명을 대상으로 상순소대 부착위치를 조사하고, 이 결과와 Hellman의 교합 발육 단계 및 상악 영구 전치의 맹출 단계 간의 관계를 분석하였다. 그 결과 상순소대는 gingival type 56.3%, papillary type 20.6%, mucosal type 18.1% 그리고 papillary penetrating type 5.0%를 보였으며, 성별에 따른 유의한 차이는 없었다(p > 0.05). Hellman의 교합발육단계가 진행하면서 mucosal type이 유의하게 증가하였다(p < 0.001). 그리고 상악 전치가 맹출함에 따라 gingival type과 mucosal type은 증가하고 papillary type과 papillary penetrating type은 감소하는 경향을 보였으나 통계학적으로 유의하지 않았다(p > 0.05).

• 대한치과교정학회지
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• 제13권1호
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• pp.83-94
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• 1983

For the better orthodontic diagnosis, case analysis, and treatment plan, the author studied the cephalometric analysis of 365 Korean with normal occlusion occording to the Steiner and Tweed analysis. The subjects consisted of 162 males and 203 females from 7 to 19 years with normal occlusion and were divided into three groups according to the Hellman's dental age. The results were obtained as follows: 1. The Ideal Acceptable Compromises were determined after measurement of male and female average by the Steiner analysis in Hellman's dental age III B, IV A, IV C group. 2. The Holdaway ration were 6.5:1.0 in Group I, 6.5:1.5 in Group II, 6.5:1.5 in Group III. 3. The Tweed's triangle were $FMA\;27^{\circ}\;FMIA\;58^{\circ}\;IMPA\;95^{\circ}$ in Group I and II, $FMA\;27^{\circ}\;FMIA\;62^{\circ}\;IMPA\;95^{\circ}$ in Group III.

• 대한치과교정학회지
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• 제6권1호
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• pp.55-63
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• 1976

This study was undertaken to establish the roentgenocephalometric standards of the Korean children in Hellman dental age III C. The subjects consisted of 33 males and 33 females with the normal occlusion and acceptable profile. The lateral cephalometric films were taken with the teeth in centric occlusion, the soft tissue outline of the nose, lips, and chin was made visible by the low-speed films, 70Kvp, 100Mas. Their linear and angular measurements were performed by Jarabak's methods. The following results were obtained; 1) The author made the tables of standard deviation from the measured values. 2) Each linear measurement of the skull was greater in males than in females. 3) The maxillary basal bones were more protrusive in Korean children than in Caucasian. 4) The degree of the facial convexity was larger in Korean children than in Caucasian. 5) The labial inclination of the upper & lower incisors was greater in Korean children than in Caucasian. The labial inclination of the upper incisor was greater in females, but the labial inclination of the lower incisor was greater in males.

• 대한치과의사협회지
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• 제16권12호통권115호
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• pp.923-928
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• 1978

The auther studied the open-bite of Hellman dental age IIIC groups of Korean childern on the roentgenocephalometry. The subjects consisted of 45 males and 45 females with normal occlusion and acceptable profile. The major conclusions may be listed as follows: 1. This study was summerized in the form of tables, mean, standard deviation, minium and maximum for 35 angular, linear and ration measurements. 2. Charts of standard deviation from the mesurements were made for the clinical application.

• 대한치과의사협회지
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• 제16권9호통권112호
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• pp.689-693
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• 1978

A girl (Hellman dental age IIC) with anterior cross bite was treated by means of the chincap and occlusal equilibration on deciduous canines. Following results were obtained; 1) The cross bite was corrected after 12 weeks of active treatment. 2) The terminal plane of deciduous molars had become 'a class II tendency' 3) The axial inclination of lower incisors were changed significantly.

• 대한치과의사협회지
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• 제22권11호통권186호
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• pp.947-951
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• 1984

The present study was performed to establish the cephalometric standards of linear measurements in Hellman dental age II C groups of Korean on the roentgenocephalometry. The subjects consisted of 21 males 31 females with normal occlusion and acceptable profile. The major conclusions were as follows. 1. The means and standard deviations of the measurements in males and females were made. 2. No sex difference was made in all items, except in U₁-Y and U₁-X.

• 대한소아치과학회지
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• 제37권3호
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• pp.359-366
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• 2010

전치부 교환기의 반대교합 아동에서는 골격적 특성이 강할수록 상하 치아의 성숙도에 현격한 차이가 있음을 쉽게 관찰할수 있다. 파노라마 방사선 사진으로 평가가 가능한 상하 치령의 차이가 III급 부정교합의 조기 징후로 개연성이 있다면, 이것은 조기 감별진단의 한 도구로써 가치가 있을 것으로 판단되었다. 부산대학교치과병원 소아치과에 내원한 Hellman 치령 IIA, IIC의 환자를 대상으로, 측두방사선사진, 파노라마 방사선사진, 석고 모형과 임상사진을 조사하여 정상교합군과 전치부 반대교합군 각 50명을 선택하였다. 이들의 파노라마 방사선사진을 이용하여 Demirjian법으로 각 군의 상하 치령 및 제1대구치 맹출율을 구하고 그 차이를 비교, 분석하여 다음과 같은 결과를 얻었다. 1. 정상교합군과 반대교합군 모두에서 역령에 비해 치령이 높게 나타났으며 성차는 보이지 않았다(p>0.05). 2. 정상교합군과 반대교합군의 상하 치령의 차이는 각각 0.22세와 0.69세로 반대교합군에서 더 큰 차이를 보였다(p<0.05). 3. 정상교합군에 비해 반대교합군에서 상하 제1대구치 맹출율의 차이가 크게 나타났다(p<0.05).

• 대한치과교정학회지
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• 제18권1호
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• pp.105-112
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• 1988

To predict duration of orthodontic treatment of malocclusion, 304 male and female patients whose orthodontic treatment was finished in department of orthodontics, Infirmary of dental college, Chosun University were studied. The duration of treatment was studied according to types of malocclusion, beginning ages of treatment, Hellman's dental ages, the determination of tooth extraction, types of tooth extraction and types of orthodontic appliance. The following results were obtained. 1. The duration of treatment was 18 months in Class I malocclusion, 20 months in Class II malocclusion and 24 months in Class III malocclusion. 2. The more early treatment was done, the more duration of treatment was needed according to beginning age of treatment and Hellman's dental ages. 3. Treatment of tooth extraction case was needed for 78 days more than that of non-extraction case. 4. The duration of treatment with unilateral extraction of premolars was the shortest (598 days) and that with single arch extraction of premolars was the longest (685 days) according to types of tooth extraction. 5. The duration of treatment by removable appliance was the shortest (237 days) and the combination of removable appliance, headgear and full banded appliance was the longest (1425 days) according to types of orthodontic appliance. 6. The duration of treatment was 18 months in typical orthodontic treatment with 4 extraction of premolar and full banded appliance.

• 대한소아치과학회지
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• 제40권1호
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• pp.21-27
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• 2013

현재까지의 많은 연구들을 통해 치아의 발육상태와 골격성 부정교합과의 연관성이 보고되어 왔다. 본 연구는 방사선학적 방법을 통하여 정상교합군과 하악 과성장형 골격성 3급 부정교합군의 상하악 치령 및 제2대구치 맹출률을 비교, 분석하여, 파노라마 방사선 사진으로 평가 가능한 상하악 치아성숙도의 차이가 하악 과성장형 골격성 3급 부정교합의 감별진단 요소로 의의가 있는지 알아볼 목적으로 시행되었다. 부산대학교 소아치과에 내원한 Hellman 치령 IIIA의 환자를 대상으로 정상교합군과 하악 과성장형 골격성 3급 부정교합군 각 50명을 선택한 후, 이들의 파노라마 방사선 사진을 이용하여 Demirjian법으로 각 군의 상하악 치령 및 제2대구치 맹출률을 구하고 그 차이를 비교, 분석하였다. 그 결과 정상교합군과 하악 과성장형 골격성 3급 부정교합군의 상하 치령의 차이는 각각 0.66세와 1.20세로 하악 과성장형 골격성 3급 부정교합군에서 유의하게 더 큰 차이를 보였으며(p < 0.05), 상하 제2대구치 맹출률은 두 그룹 간 유의한 차이를 보이지 않았다(p > 0.05).

• 대한치과교정학회지
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• 제12권2호
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• pp.177-191
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• 1982

The study was performed to establish the cephalometric standards of Hellman dental age III B, IV A, IV C groups of the age of puberty and to aid for the case analysis and diagnosis of malocclusion. A roentgenocephalometric study was made from 365 subjects, that consist of 162 males, 203 females with normal occlusion, acceptable profile and no history of orthodontic and prosthodontic treatment. The results of this study were obtained as follows: 1. The tables of standards from the measurements by age, sex group were made. 2. All linear measurements of skeletal pattern in male were greater than in females. 3. The Bjork's sum was reduced gradually by aging in group I $396^{\circ}$, group II $395^{\circ}$, and group III $393^{\circ}$. 4. Posterior facial height to anterior facial height was 63% in group I, 64% group II, and 67% in group III. 5. The angulation of SNA and SNB were $81^{\circ}$ & $78^{\circ}$ in group I, $81^{\circ}$ & $78^{\circ}$ in group II, and $82^{\circ}$ & $79^{\circ}$ in group III.