• 대한소아치과학회지
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• 제21권2호
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• pp.486-490
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• 1994

Maxillary first molar is the key in normal occlusion. Mesial drifting of maxillary first molar result form early loss of second deciduous molar. Mesial drifted maxillary first molar was treated by headgear, Hawley appliance with screw, brasswire, etc. But, these appliance should be necessary for patients cooperation. Recently, several appliance for molar distalizing without patients cooperation has been introduced. We are reporting in this paper about distalizing of mesial drifted maxillary first molar because of early loss of deciduous second molar by open coil jig. Distalization of molar by open coil jig is predictable, rapid, painless method without mecesscity of patient cooperation.

• 대한소아치과학회지
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• 제7권1호
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• pp.13-16
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• 1980

The purpose of this study is to analyze the changes of arch circumferences during the deciduous dentition period. 600 stone models of maxillary and mandibular arches obtained from the children aged 3,4, or 5 years were under measurement. 1. Arch circumferences increase with age both in males and in females. 2. Arch circumferences of males are longer than females at the age of 4 and 5, but no notable differences at the age of 3. 3. Arch circumferences of upper arches are longer than those of lower arches.

• 한국임상수의학회지
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• 제35권4호
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• pp.137-140
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• 2018

A five-month-old toy poodle was referred for treatment of bilateral mandibular fractures. Preoperative skull and dental radiographs showed rostral mandibular fractures and permanent teeth that had not yet erupted. In addition to providing stability for the healing of fractures, it is very important to focus on restoring normal occlusion. The mandibular fractures were repaired using interdental wiring in a dentate area where the deciduous canines and fourth premolars were stable and could be used to anchor the interdental fixation. In the absence of an erupted permanent mandibular first molar, the modified Risdon wiring was performed using the deciduous mandibular fourth premolars as anchor teeth. An intraoral splint was placed on the mandibular teeth using self-curing composite resin. Five months after surgery, the patient had experienced no complications, and the permanent teeth had erupted normally. In this case, which involves a small-breed puppy with deciduous dentition, treatment with a wire-reinforced interdental splint using intact deciduous fourth premolar teeth as anchor teeth can be considered as a suitable method for rostral mandibular fracture restoration.

• Journal of Periodontal and Implant Science
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• 제24권1호
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• pp.15-25
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• 1994

Keratinized ginigva has clinical singificance in periodontal health because it plays important roles in resistance to mechanical trauma, to penetration of bacteria, and to tensional stress by muscle attachment. In order to investigate the width change of anterior keratinized gingvial during transitional period, the width of kerainized gingiva on anterior teeth was measured annually in elementary school children with deciduous dentition until the successive anterior teeth were completely erupted. The distance from the gingival margin on mid-portion of crown to mucogingival junction was measured by Boley gauge(Hu-Friedy, U.S.A.) and was recorded as the width of keratinized gingiva. The difference of the width of keratinized gingiva according to sex and dentition was analyzed statistically by Student t-test. Following results were obtained : 1. In deciduous dentition, it was shown that the width of keratinized gingiva on maxillary central incisors($3.28{\pm}0.83mm$) was the widest(p<0.01), and that on maxillary lateral incisors, mandibular central and lateral incisors was $2.69{\pm}0.86mm$, $2.51{\pm}0.71mm$, $2.43{\pm}0.68mm$, respectively. 2. In mixed dentition, it was shown that the width of keratinized gingiva on maxillary central incisors ($5.10{\pm}0.86$) was the widest(p<0.01), and that on maxillary lateral incisors, mandibular central and lateral incisors was $4.35{\pm}0.83mm$, $3.51{\pm}0.60mm$, $3.57{\pm}0.66mm$, respectively. 3. The width of anterior keratinized gingiva was significantly increased after the successive anterior teeth were completely erupted(p<0.001). The width of keratinized gingiva on maxillary central and lateral incisors, and mandibular central and lateral incisors was increased by $1.82{\pm}0.83mm$, $1.65{\pm}0.69mm$, $0.99{\pm}0.39mm$, and $1.14{\pm}0.98mm$, respectively. 4. There was no statistical significance in the difference of the width of anterior keratinized gingiva between male and female(p>0.05).

• 대한소아치과학회지
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• 제34권3호
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• pp.447-453
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• 2007

본 연구는 유치열에서 치아기형 발생빈도와 영구치열에 미치는 영향을 조사하여 치아기형의 조기진단의 필요성을 평가하기 위한 것이다. 2000년도에서 2005년까지 전남대학교병원에 내원한 환자 중 파노라마 방사선 사진을 촬영한 2세에서 7세 사이의 어린이를 조사하여 유치열에서 이중치와 선천적 결손치의 유병율을 조사하고 그러한 유치열의 이상과 영구치열과의 상호관계를 조사하였다. 134명의 남아와 120명의 여아로 총 254명의 파노라마 필름을 조사하였으며 이중 8명(5명의 남아, 3명의 여아)에서 유치열에서의 결손치가 발견되었고 4명(2명의 남아, 2명의 여아)에서 유치열에서의 이중치가 발견되었다. 유치열에서 이중치의 유병율은 1.6%였으며 선천적 결손치의 유병율은 3.1%였다. 피검자 중1명은 하악의 이중치와 상악의 결손치를 가지고 있었다. 유치열의 이상이 나타난 11명 중 7명에서 계승 영구치의 결손이 발견되었다. 본 연구에서 유치열의 치아기형이 나타난 경우 계승 영구치에서 치아결손이 빈발할 수 있다는 것을 보여주었다.

• 대한소아치과학회지
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• 제25권1호
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• pp.116-126
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• 1998

Numerous chemical agents have been developed to reduce the activity of cariogenic bacteria. Of these, chlorhexidine is acknowledged as the most effective. Gel and mouthrinse have been the traditional method of its application in the mouth. It has been reported that chlorhexidine varnish has prolonged inhibitory effect on the number of streptococcus mutans in saliva and plaque. Recently, chlorhexidine varnish and polyurethane sealant have been developed to promote prolonged anticariogenic effect of chlorhexidine. Products containing 10% chlorhexidine varnish and polyurethane sealant have been developed to prevent caries by reducing the number of streptococcus mutans in the oral cavity. The purpose of this study is to investigate the inhibitory effect of chlorhexidine varnish and polyurethane sealant on streptococcus mutans in the primary dentition. Children with primary dentition containing no active carious lesion were divided into two groups. To the experimental group (n=11), chlorhexidine varnish and polyurethane sealant ($Chlorzoin^{(R)}$, Knowell Therapeutic Technologies, Inc. Canada.) was applied once a week for four weeks according to the manufacturer's instruction. Only oral prophylaxis was performed on the control group(n=7). Caries activity was measured after using $Cariescreen^{(R)}$SM (Knowell Therapeutic Technologies, Inc. Canada,) to incubate streptococcus mutans before and 5, 12, 24 weeks after initial varnish application. The following results were observed.; 1. There was statistically significant decrease in the number of streptococcus mutans in the experimental group for 5 weeks(P<0.01), 12 weeks(P<0.05) after the initial application. but, by 24 weeks significant difference had disappeared. 2. As the inhibitory effect of chlorhexidine varnish and polyurethane sealant application is not everlasting, reapplication at 12-24 weeks should be needed.

• 대한소아치과학회지
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• 제11권1호
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• pp.191-213
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• 1984

This study was made on the facial profile of the normal Korean children using the roentgenographic cephalograms. The subjects consisted 51 males and 47 females children of primary dentition with the normal occlusion and acceptable profile. For this study 13 soft tissue profile landmarks were plotted and 14 liner length, 9 soft tissue thickness, 8 vertical height length, 12 angles of soft tissue profile, and 2 vertical proportion were measured. The mean and standard deviations in the subjects were calculated and compared between male and female. The following results were obtained : 1. By the significant test, total facial convexity angle and soft tissue thickness were no significant difference between both sexes. 2. Lower facial height was greater than upper facial height in both sexes. 3. The vertical length of the upper and lower lips were 21.95 mm, 40.74 mm in male and 21.62 mm, 39.63 mm in female. 4. In the relationship of the upper lip and lower lip to the Ricketts' esthetic line, the male was 1.3 mm, 1.18 mm and the female was 1.16 mm, 1.27 mm front of the esthetic line. 5. Compared with the angulation of flush terminal plane group and mesial step group, the mesial step group was greater than the flush terminal plane group except the chin angle.

• 구강회복응용과학지
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• 제40권2호
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• pp.100-106
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• 2024

조기 교정치료의 개입은 종종 성장하는 치열을 정상 교합으로 유도하는 것에서부터 시작된다. 유치의 상실로 인한 맹출 실패를 예방하는 가장 간단한 방법은 밴드 및 루프와 같은 공간 유지장치를 부착하는 것이다. 밴드 및 루프 공간 유지장치는 밴드의 픽업 인상 과정을 거쳐야 하며, 시멘트 소실과 탈회, 인접치의 locking과 같은 문제들을 갖고 있다. 이러한 문제를 해결하기 위해서 CAD/CAM을 이용한 band가 필요 없는 공간유지장치가 개발되었다. 본 증례는 밴드 없이 CAD/CAM을 이용하여 하악 제2소구치가 성공적으로 맹출할 수 있었기에 이를 보고하는 바이다.

• 대한소아치과학회지
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• 제21권2호
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• pp.540-546
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• 1994

The authors treated three patients who chiefly complained functional anterior crossbite due to premature loss of primary molars by using removable space maintainer and functional appliances. In orthodontic practice, the mandibular rest position and the possibility of taking construction bite have been as the criteria for evaluation of functional factors involved in anterior crossbite. Functional anterior crossbites, if left untreated, may have deleterious effects on the development and function of craniofacial complex and TMJ. Objectives of the treatment were as follows: 1) to recover vertical dimension 2) to eliminate functional disharmony 3) to correct anterior reversed occlusion 4) to attain good facial esthetics 5) to prevent unfavorable growth of jaw & dentition Characterized craniofacial morphology resulting from the premature loss of deciduous molars could be recovered following the correction of crossbite. Therefore, it is recommended that in orthodontic diagnosis of functional anterior crossbite due to premature loss of deciduous molars, the craniofacial abnormality affected by that should be considered.

• 대한소아치과학회지
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• 제35권2호
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• pp.345-350
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• 2008

반대교합은 교두간섭이나 유구치의 조기상실 등에 의해 하악이 기능적인 전방위로 위치된 기능성 반대교합과 하악골의 과성장, 상악골의 열성장 또는 양자가 복합된 골격성 반대교합, 구치부의 관계는 1급이나 전치부의 치축경사가 조화를 이루지 못해 발생되는 치성 반대교합으로 분류된다. 1970년 Rolf Frankel에 의해 소개된 Functional regulator(FR)의 한 종류인 FR-III는 상악의 열성장을 동반한 반대교합을 개선하기 위해 유치열기, 혼합치열기, 및 초기 영구치열기에 사용되고 있다. 이 장치는 비정상적인 근육력을 차단하여 구강내 치열 및 악궁에 대한 힘의 불균형 상태를 개선하고, 구강주위의 근육을 훈련시켜 새로 형성된 힘의 균형에 의해 이차적으로 악안면골의 크기와 형태를 변화시킨다. 본 증례는 상악 중절치가 맹출하기 전에 미약한 상악 열성장과 전치부의 깊은 교합을 동반한 전치부 반대교합을 FRIII로 치료하여 양호한 결과를 얻었기에 이에 보고하는 바이다.