• 대한치과교정학회지
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• 제17권2호
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• pp.215-221
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• 1987

This study was designed to investigate the growth amount and rate of mandible by the measurements of mandibular lateral surface and the relationship of peak growth increments between mandible and body height The sample consisted of twenty-five boys and fifteen girls between the ages of 6 and 13 The surface of mandible was measured from digitized roentgenocephalometric analysis (A 27 point mandibular model) The findings of this study can be summarized as follows 1 No significant difference was found between mandibular lateral surfaces of the both sexes at the ages studied. 2 The mean growth amount of mandibular lateral surface from 6 to 13 years of ages was $9\;09cm^2$ in boys and $8\;29cm^2$ in girls, and the mean growth rate was 46 07% in boys and 42 57% in girls 3 The prepubertal peak growth increment in mandible was found between the ages of 11-12 in girls and 12-13 in boys 4 The prepubertal peak growth increments of mandible occured one year later that of body height in boys and girls.

• 대한치과교정학회지
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• 제22권3호
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• pp.603-615
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• 1992

This study was undertaken to investigate the interrelationship between the growth change of mandible and the developmental age of growing girls in the longitudinal data from 7 years to 15 years. The data were obtained from maturation stage of cervical vertebrae through the serial lateral cephalogram, height increment records which was taken at one year interval, menarche date through interview. On the basis of findings of this study, the following conclusions were obtained. 1. In general the growth of mandible (Ar-Pog, Ar-Go, Go-Pog) showed two peaks of growth velocity. 2. The maximum growth of mandible (Ar-Pog, Ar-Go, Go-Pog) almost appeared between stage 3 and stage 4 in maturation of cervical vertebrae. 3. It showed the tendency that the maximum increment of height appeared faster than that of mandible (Ar-Pog, Ar-Go, Pog-Go). 4. The maximum growth of height almost appeared between stage 2 and stage 3 in maturation of cervical vertebrae. 5. It showed the tendency that the menarche appeared later than the maximum growth of mandible (Ar-Pog, Ar-Go, Pog-Go). 6. The menarche almost appeared at stage 4, stage 5 in maturation of cervical vertebrae.

• 대한소아치과학회지
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• 제26권1호
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• pp.126-132
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• 1999

저자는 전남대학병원 소아치과에 내원한 혼합치열기 II급 부정교합환아를 Activator와 Anterior high pull headgear로 치료하여 다음과 같은 결론을 얻었다. 1. 상악골의 전, 하방 성장을 억제하였다. 2. 하악골의 전방 전위 및 반시계방향 회전을 유도하였다. 3. Deep overbite와 large overjet이 개선되었다.

• 대한치과교정학회지
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• 제19권1호
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• pp.77-93
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• 1989

The purpose of the present study were to disclose whether the depth of the mandibular antegonial notch can be used as an indicator of mandibular growth potential. The patients composed of 76 samples and were classified following 3 groups, based on the depth of mandibular antegonial notch : Deep notch group (more than 3mm), Neutral notch group (1-3mm), Shallow notch group (less than 1mm). For each case, the first lateral cephalograms were taken prior to the start of treatment and the second films 3-4 years after. The results were as follows; 1. Deep notch group had a shorter corpus, less ramus height and greater genial angle than did Shallow notch group. 2. Deep notch group had a more retrusive mandibular position than Shallow notch group. 3. Deep notch group had longer total anterior facial height and longer anterior lower facial height group. 4. Deep notch group grow vertical clockwise growth pattern, while Shallow notch group grow horizontal counterclockwise growth pattern. 5. Deep notch group had less mandibular growth than Shallow notch group during observation period.

• 대한치과교정학회지
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• 제11권1호
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• pp.25-30
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• 1981

Fifteen young pigs were used in this study. The animals were divided into three groups 1. Group for removal of the temporal muscle, 2. Group for removal of the masseter muscle, 3, Group for removal of masseter and internal pterygoid muscles. The animals were anesthetized with $3.5\%$ chloral hydrate intraperitoneally. In the right side the head was shaved. The masticatory muscle was removed. The animals were sacrificed four months later. The head was separated from trunk and cleaned by boiling in a solution of potassium hydroxide. The results were as follows; 1. In the group for removal of the temporal muscle, the Coronoid process of the mandible was resorbed. 2. In the group for removal of the masseter muscle, there was produced asymmetrical growth of the mandible, attrition of the molar teeth in the control side, and resorption of the mandibular angle. 3. In the group for removal of the Masseter and Internal muscles, the changes were more severe than that of the group for removal of the masseter muscle. The mandibular angle was completely absent. 4. The growth of the bone seems definitely related to the presence of the muscular tissue actively pulling upon it.

• 대한치과교정학회지
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• 제16권1호
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• pp.119-131
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• 1986

The purpose of the study is to note the effects of the resection of the lateral pterygoid muscle on the mandibular growth in the growing rats. Twenty four female Wistar rats were used in the experiment. They were divided into three groups: group 1 ; bilateral sham operation group 2 ; bilateral resenction of the lateral pterygoid muscle group 3 ; unilateral resection of the lateral pterygoid muscle (The right lateral pterygoid muscle was resected and the left one was sham-operated.) Groups 1&2 were sacrificed eight weeks lateral and group 3, four weeks later. All specimens were measured with calipers, and stained with hematoxylin and eosin. Groups 1 & 2 were compared with each other. In group 3, the right side was compared with the left. The results were as follows: 1. In the growing rats, the resection of the lateral pterygoid muscle was followed by a decrease of the mandibular growth. After eight weeks, the condyle-mental foramen distance, the angular process-mental foramen distance, the size of the condylar head, the supradentale-first molar distance, and the diameter of the symphysis were significantly smaller than the control. 2. Resection of the lateral pterygoid muscle resulted in decrease of the thickness of the cartilage layer and the prechondroblastic-chondroblastic layer after four weeks. 3. After eight weeks, group 1 and group 2 were not different significantly in the histologic sections. 4. The condylar cartilage was stabilized eight weeks after the experiment.

• 구강회복응용과학지
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• 제34권3호
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• pp.246-250
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• 2018

법랑아 세포종은 치성 상피에서 기인한 양성 종양의 일종이다. 하악골에 가장 흔하게 발생하는 양성종양이며 공격적인 성장과 국소적 침범의 특징을 가진다. 그 중 단방성 법랑아 세포종은 방사선학적으로는 단방성의 특징을 가지며 병리학적으로는 낭종의 특징을 가진다. 낭종성 법랑아 세포종의 병소의 크기가 큰 경우 감압술 및 조대술이 보존적인 치료 방법으로 사용된다. 이 치료 방법의 목적은 병소의 크기를 줄여 완전 적출이 손쉽게 하며 악안면 부위 변형이나 신경 손상을 방지하는데 있다. 본 증례에서는 병소의 크기가 큰 낭종성 법랑아 세포종을 감압술 및 조대술로 성공적으로 치료한 치험례를 논문 고찰과 함께 보고하고자 한다.

• 대한치과교정학회지
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• 제12권2호
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• pp.117-126
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• 1982

저자(著者)는 골악형(骨顎型) 혹(或)은 기능형(機能型)과 병합(竝合)되었다고 판단(判斷)되는 반대교합(反對咬合)을 가진 Hdllman씨(氏) 치령(齒齡) IIc에서 IIIc까지의 여자(女子) 어린이 7명(名)을 주(主)로 신모(?帽)를 이용(利用)하여 치료(治療)하였다. 이들 치료(治療)한 어린이의 치료전후(治療前後)의 두부방사선규격사진(頭部放射線規格寫眞)을 중첩 분석 하여 신모(?帽)가 안면골(顔面骨) 성장(成長)에 미친 효과(?果)를 분석(分析)한 결과(結果), 공통점(共通點)을 다음과 같이 요약(要約)할 수 있었다. 1. ∠ ANB, Y-axis angle, SN-MP angle의 증가(增加)가 일어났다. 2. N-Me의 증가(增加)가 S-Go의 증가(增加)보다 크게 나타났다. 3. 결과적(結果的)으로 하악골(下顎骨)의 backward rotation이 일어났다.

• 대한치과교정학회지
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• 제15권2호
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• pp.175-195
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• 1985

Vertical and horizontal growth occur in the craniofacial complex which ensues continuous changes in facial morphology, until the end of active growth period. Longitudinal study for individual is essential, in the research on growth and development, however, the difficulties in obtaining long term subjects in Korea, the research has been limited. The author analyzed the cephalometric roentgenogrems of 43 boys and 47 girls taken from the ages 6 to 10. The subjects were divided into 3 groups according to SN-MP angle and 2 groups according to gonial angle. In this longitudinal study, 21 variables were measure 4. The obtained results were as follows: 1. SN-MP angle and genial angle had no significant changes in each group with age. 2. With age, facial convexity of hard tissue decreased in all groups, facial angle of hard tissue increased in low SN-MP angle group, but facial convexity of soft tissue had no significant changes in all groups with age. 3. In comparison of high SN-MP angle group and low SN-MP angle group, the former had greater facial convexity and smaller facial angle than the latter. 4. SN-MP angle and the ratio of posterior dental height to anterior dental height had reverse correlation in all groups. 5. High genial angle group revealed larger SN-MP angle, anterior dental height facial convexity, but smaller mandibular length, and the ratio of posterior dental height to anterior dental height compared with low genial angle group.

• 대한치과의사협회지
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• 제56권2호
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• pp.103-112
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• 2018

The treatment of skeletal Class II growing patient is to move the mandible into the Class I molar positon via facilitating mandibular growth. The functional appliances are to be designed to exert three major functions such as palatal expansion, forward growth of mandible and increase of the posterior vertical dimension. One of the devices that can achieve both the palatal expansion and the eruption of the mandibular molar is the Twin-Block introduced by Clark in 1982. In this part, we present the treatment method with Twin-Block functional appliance for the correction of skeletal Class II growing patient.