• 대한소아치과학회지
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• 제44권1호
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• pp.99-107
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• 2017

유착된 유구치의 치료에 있어 조기 진단이 매우 중요하다. 유착으로 인하여 발생된 저위교합을 방치하는 경우 교합적인 문제가 생길 수 있으므로 정기검진을 통한 진단과 이에 따른 적절한 치료가 필요하다. 저위교합 된 유구치의 치료 방법으로 정기검진, 보존적 접근, 보철적 수복, 발치를 수반한 공간획득 등이 있다. 본 증례에서는 상악 제2유구치의 유착으로 인하여 제2소구치 치배의 변위를 보이는 두 명의 환아를 대상으로 이환치의 발거를 먼저 시행하고 고정성 혹은 가철성 교정장치를 이용하여 공간확장술을 함으로써 변위 되었던 제2소구치 치배의 정상 맹출을 유도하였으며 장기간에 걸쳐 부작용이 없었음을 보고하는 바이다.

• 대한치과의사협회지
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• 제54권6호
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• pp.414-428
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• 2016

Objectives: The aim of this study was to assess the morphologic characteristics of two types of stainless steel crowns (SSCs) for the first primary molar using a 3D scanner. Study design: Two types of SSCs, KIDS CROWN (KC) and 3M ESPE ND-96 (ND), for the first primary molars were scanned using a 3D scanner. The mesiodistal and buccolingual diameters at the height of the contour and the cervical margin, occlusocervical diameters on the mesial, distal, buccal, and lingual aspects were measured, and the crown shape ratio, the smooth surface crown height ratio, and the cervical convergence were calculated. Results: In the crown shape ratio of the mandibular SSC, KC was larger buccolingually compared with ND. In the smooth surface crown height ratio, ND was larger than KC in all of the maxilla and mesial, distal, and lingual aspects of the mandible. ND was more convergent to the cervical mesiodistally and buccolingually compared with KC. Conclusion: In the superimposed images of the maxillary SSC, the mesiolingual and distolingual line angles of KC were more prominent compared with ND. In the mandible, ND demonstrated higher cusps and more obvious buccal developmental lobes than KC. ND showed a larger cervical undercut than KC.

• 대한소아치과학회지
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• 제40권4호
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• pp.314-320
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• 2013

하악 제1대구치 맹출장애의 빈도는 전체 인구의 0.01%로 드물게 나타나며, 발생 원인과 발견 연령 등에 따라 매복, 일차적 만기잔존(primary retention), 이차적 만기잔존(secondary retention) 등으로 분류된다. 치료로는 주기적 관찰, 외과적 노출술, 외과적 노출술 후 교정적 견인술, 탈구를 동반한 교정적 견인술, 외과적 재위치술, 발치 등의 방법을 적용할 수 있다. 이 증례보고는 각각 매복, 일차적 만기잔존, 그리고 이차적 만기잔존으로 진단된 5명의 환자들에서 다양한 치료방법을 이용하여 하악 제1대구치를 성공적으로 교합유도한 증례들을 보여준다. 맹출장애를 갖는 하악 제1대구치는 치아의 평균적인 맹출시기에 임상 및 방사선검사를 통해 매복, 일차적 만기잔존, 그리고 이차적 만기잔존으로 적절하게 진단내려질 수 있으며, 치아의 맹출 정도, 대합치와 인접치와의 관계, 환자의 연령, 협조도, 경제적 상황을 종합적으로 고려하여 치료되어야 한다.

• 대한소아치과학회지
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• 제31권2호
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• pp.153-158
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• 2004

소아치과 임상에서 기성금관 수복은 광범위한 우식병소를 가졌거나 치수치료를 받은 치아에 필수적인 술식으로 간주된다. 그러나 기성금관 장착을 위한 치아삭제 과정 중 인접 치면에 의원성 손상이 생길 경우 우식이환율이 높아질 수 있다. 특히 제 2유구치에 기성금관을 위한 지대치를 형성할 때 인접한 제 1대구치 근심면에 발생될 수 있는 의원성 손상은 치아 우식으로 진행될 잠재성을 가지게 된다. 따라서 본 연구는 제 2유구치의 기성금관을 위한 지대치 형성과정에서 생길 수 있는 제 1대구치의 의원성 손상의 유형과 정도를 알아보고자 하였다. 부산대학교병원에 내원한 소아들을 대상으로 기성금관으로 수복한 제 2유구치의 원심면을 치간이개용 고무링으로 치간이개를 한 후 러버인상재로 인접면의 인상을 채득하고 주사 전자현미경상에서 관찰하여 의원성 손상의 정도를 확인하였다. 제 1대구치의 근심면이 인기된 시편을 주사 전자현미경으로 관찰한 결과, 약 66.7%에서 다양한 유형과 정도의 의원성 손상을 확인할 수 있었다. 따라서 유구치의 기성금관 장착을 위한 지대치 형성과정에서는, 치간이개용 고무링이나 wedge를 이용한 치간이개, matrix band를 이용한 인접 치면의 보호, 인접면 삭제방법의 수정 등과 같은 의원성 손상을 예방하기 위한 술자의 노력이 필요할 것으로 사료되었다.

• 대한소아치과학회지
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• 제10권1호
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• pp.25-33
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• 1983

With electron microscope, author studied on the pulp structure of human primary tooth in shedding stage. Non-carious human primary molar teeth were selected for this study. Using standard methods, specimens were sectioned and examined by light and electron microscope, The results were as follows; 1. In coronal pulp, odontoblasts were replaced by multinucleated odontoclasts, which contained a large number of mitochondria of varying shape and vacuoles in cytoplasm. Where odontoclasts were in contact with tooth surface, the characteristic ruffled border and clear zone were observed. 2. Fibrous tissue with plentiful collagen fibers and fibroblasts was observed adjacent to the dentin in the pulp. Fibroblast contained a number of mitochondria and well-developed rough-surfaced endoplasmic reticulum. 3. Inflammatory cells were observed in the pulp and active fibroblasts could be seen between inflammatory cells. In many cases, cervical epithelium proliferated toward absorbed area. 4. Inflammatory cells consisted of a number of lymphocytes, polymorphonuclear leukocytes, plasma cells and macrophages. Macrophage containing lysosomes in digestive state or phagocyting PMN could be seen. 5. In the primary molar of delayed root resorption, odontoblast layer, zone of Weil and cell-rich zone could be seen at roof of pulp chamber and odontoblast in this area cont과ained some lipid droplets.

• 대한치과의사협회지
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• 제15권12호
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• pp.993-997
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• 1977

The author studied clinically the state of sagittal molar relationship, sagittal canine relationship and frontal molar relationship in 3 years old, 1624 children. The results were as followings; 1. In frontal molar relationship, 1369 children(86.0%) showed normal transversal relation, 214(13.2%) showed cross bite and 14(0.8%) showed scissors bite. 2. In sagittal molar relationship, 41 children(4.4%) showed vertical terminal plane, 352(21.7%) showed distal step, 807(49.7%) showed mesial step and 394(24.2%) showed unilaterally. 3. In sagittal canine relationship, 186 children(11.5%) showed same plane, 248(15.3%) showed distal step, 777(47.8%) showed mesial step and 413 (25.4%) showed unilaterally.

• 대한소아치과학회지
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• 제29권3호
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• pp.382-388
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• 2002

전라북도 전주시 유치원 어린이 650명을 대상으로 구강내 검사 실시하여 평균 연령 4.5세 어린이 100명(남아 50명, 여아 50명)의 유치열 석고모형을 계측하여 다음과 같은 결과를 얻었다. 1. 유치의 계측자내 오차는 제1유구치에서 다소 크고, 총평균치는 0.255mm이었다. 2. 유치의 근원심 및 순(협)설측 치관 직경은 전체 유치에서 남아가 여아보다 컸다. 3. 변동계수(coefficient variation)는 남 여아 모두 유전치부위가 유구치부위에 비해 다소 큰 경향을 보였고, 근원심 및 순(협)설측 치관 직경 모두 제2유구치에서 크기변화가 가장 적게 나타났다. 4. 좌, 우측 동명치 사이의 차이를 나타내는 비대칭성에서는 상악 근원심 크기 측정을 제외하고는 근원심 및 협설측 치관 크기 측정 모두에서 제2유구치가 제1유구치보다 보다 덜 비대칭적이었다. 5. Crown index는 상악의 경우 여아보다 남아에서 큰 반면, 하악의 경우에는 유견치를 제외하고는 여아에서 컸다. Crown module은 여아보다 남아에서 컸고, 일반적인 치아크기가 유중절치에서부터 제2유구치까지 점차 증가하였다. Crown area도 여아보다 남아에서 컸으며 하악 유중절치가 가장 적은 면적을 나타냈고, 상악 제2유구치가 가장 큰 면적을 나타냈다.

• 대한소아치과학회지
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• 제23권2호
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• pp.389-400
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• 1996

In Class II amalgam restoration in deciduous molar, failure rate and incidence of recurrent caries are high as children become older. In order to preserve deciduous molars till the physiologic exfoliation time, stainless steel crown is a choice of the treatment. As a result of a careless treatment, such as overhanging margin, poor marginal adaptation, poor proximal contour and inadequate mesiodistal width give rise to interfering eruption of the adjacent teeth, recurrent caries and chronic gingival irritation and insufficient arch length respectively. In this study, 252 s.s. crowned teeth extracted due to physiologic exfoliation or periapical lesion. The purpose of this study is to analyze the marginal adaptation of stainless steel crown to the deciduous molar in order to obtain better clinical result. The results were as follows : 1. Between the length of s.s. crown and the marginal gap of crown, positive correlations were shown. 2. Largest amount of marginal gap was shown at buccal side in upper deciduous molars and lower first deciduous molar, lingual side in lower second deciduous molar. But no significant diffrence were found statistically compared to second most largest one. 3. Incidence of exposed restoration and recurrent caries were higher in proximal surface than buccal/lingual surface. And extension of restoration below the margin of s.s. crown gives rise to higher rate of recurrent caries. 4. Defect of contour was found in 34%, frequently found in lower 1st deciduous molar and upper 1st deciduous molar. 5. Marginal polishing defects were found in 23%. 6. Ledge was formed in 10% especially in lower 1st deciduous molar and lower 2nd deciduous molar. 7. 16% of the teeth had wear facet due to traumatic occlusion, 7% of them had occlusal perforation.

• Journal of Oral Medicine and Pain
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• 제19권1호
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• pp.57-72
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• 1994

This study was undertaken to obtain the data age determination following the eruption of individual cusps of the first molars in the point of forensic odontology. 532 children (294 male and 238 female, born between April, 1989 and March, 1986) from a kindergarten and a primary school in a reesidential district in Seoul were studied. The eruption state of the first molar was divides into 6 stages according to the degree of exposure of individual cusps, and correlation between the stage and age was stastically analysed. The results of the study lead to following conclusions : 1. The most frequently seen eruption sequence of cusps for the upper first molar was mesibuccal cusp, mesiopalatal cusp, distobuccal cusp, mesiodistal cusp, distopalatal cusp. As for the lower first molar : mesiobuccal cusp, mcsiolingual cusp, distobuccal cusp, distolingual cusp. 2. The time of eruption was earlier in the female ethan in the male, but it was stastically remarkable only in upper and lower parts of the right and the left teeth of subjects age between 6.0 and 6.5 and upper part of the right and the left teeth of subjects age over 7.5 3. The eruption of the lower first molar was comparatively earlier than that of the upper first molar and there was no significant stastical difference between the right and the left first molars in the time of eruption. 4. There was no noticeable difference in the eruption sequence of cusps, irrespective of sex and side. 5. The eruption of the upper first molar is started at the age of about 6.4 and complete the age of about 7.1 and as for the lower first molar, it is from 6.3 to 7.0

• 대한소아치과학회지
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• 제5권1호
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• pp.19-26
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• 1978

The author studied occlusion in the primary dentition of 3~5 year old children and the materials for the present study comprised plaster model of 266 children in Seoul. The results were as followings; 1) In sagittal canine relationship, 63.9%(170 children) showed class 1 pattern, 2.3%(6 children) showed class 2 pattern, 21%(56 children) showed class 3 pattern and 12.8%(34 children) showed a different canine relationship in each side. 2) In sagittal molar relationship, 44.3% 118 children) showed class 1 pattern, 6.1%(16 children) showed class 2 pattern, 32.3%(86 children) showed class 3 pattern and 17.3%(46 children) showed a different molar relationship in each side. 3) In overjet, 87.8%(234 children) showed under 2mm. 4) 5.3%(14 children) showed crossbite and 4.6%(12 children) showed scissors-bite. 5) 21.8%(58 children) showed midline deviation. 6) Primate space was coincided with more common position of interdental space.