• 대한소아치과학회지
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• 제23권2호
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• pp.450-460
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• 1996

The purpose of this study was to compare shear bond strength of composite resin using several dentin bonding agents and light cured glass ionomer cement(Fuji II LC). 40 Bovine primary anterior teeth were used for this experiment. Labial surface of teeth were flattened. It were divided into four groups. Each group was composed of 10 teeth. The material used for this experiment were Scotchbond Multipurpose-Z-100, Allbond 2-Aelitefil, Gluma-Pekalux, light cured glass ionomer cement(Fuji II LC). Each of the materials was applied to the exposed surfaces of 10 teeth by insertion into a cylindrical shaped matrix which is 3mm diameter and 3mm in height. The completed specimens were stored at $37^{\circ}C$ under 100% humidity for 24 hours : the shear bond strength of each material to dentin surface were measured with INSTRON universal testing machine. The results were as follows : 1. Shear bond strength to dentin surface increased in order of light cured glass ionomer cement(Fuji II LC), Gluma, Allbond 2, Scotchbond Multipurpose. 2. Between shear bond strength of light cured glass ionomer cement(Fuji II LC) and Allbond 2, there was statistical significace(p<0.05) 3. Between shear bond strength of light cured glass ionomer cement(Fuji II LC) and Scotchbond Multipurpose, between shear bond strength of Gluma and Scotchbond Multipurpose, there was statistical significance.(p<0.01) The shear bond strength of dentin bonding agents were higher than light cured glass ionomer cement. The reason is that materials and quality of dentin bonding agent were enhanced. Further investigation is necessary to improve shear bond strength of light cured glass ionomer cement.

• 대한소아치과학회지
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• 제33권2호
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• pp.311-316
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• 2006

중심교합위 상태에서 편측이나 양측으로 구치부의 상악치아가 하악치아의 협측으로 위치한 경우를 scissors bite라고 한다. 이런 부정교합은 상악의 폭이 크거나 하악의 폭이 좁은 경우 발생한다. 이로 인해 턱의 성장이 방해를 받고 악궁간 부조화를 유발하며 적절한 저작을 할 수 없게 된다. 따라서 scissors bite는 즉시 차단교정을 해야하며 일반적으로 scissors bite의 치료는 고정성 또는 가철성 장치를 이용하여 하악을 확장한다. 이에 저자는 scissors bite를 보이는 환아의 4세의 두 명의 남아에게 Schwarz장치를 이용하여 양호한 결과를 얻어 scissors bite의 치료법 제시에 도움이 되고자 보고하는 바이다.

• 대한소아치과학회지
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• 제48권2호
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• pp.237-244
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• 2021

상아질형성부전증은 상아질 형성 이상이 초래되는 유전성 질환으로 상염색체 우성 형질을 따른다. 상아질형성부전증은 유치와 영구치 모두 이환되며, 다양한 치아 변색, 상아질 및 법랑질 파괴, 심한 치아마모 등의 임상소견을 보인다. 방사선학적으로 치아는 가느다란 치근과 둥그런 치과의 형태를 보이고 치수강은 적거나 폐쇄되었다. 상아질형성부전증의 치료는 추가적인 마모를 방지하고 수직고경 회복을 목표로 한다. 본 증례는 치아의 마모와 변색을 주소로 내원한 상아질형성부전증을 지닌 남매의 상이한 15년간의 장기 예후를 보고하고자 한다. 두 환자에서 치료개입 시기의 차이에 따라 상이한 치료과정을 볼 수 있다. 첫 번째 환아는 대부분의 본인 치아를 살렸으나, 두 번째 환아는 모든 치아를 발치하였다. 이는 상아질형성부전증의 조기 진단 및 치료방법 결정에 도움이 될 수 있다.

• Journal of Preventive Medicine and Public Health
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• 제52권5호
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• pp.333-343
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• 2019

Objectives: This study aimed to evaluate the association between dental implants and cognitive function in community-dwelling older adults. Methods: Data were collected from the baseline survey (2016-2017) of the Korean Frailty and Aging Cohort Study. The study sample comprised 1115 community-dwelling people aged 70 years to 84 years who had 0-19 natural teeth. Dental implants and natural teeth were identified by panoramic radiography, while the cognitive function was assessed by the Korean version of the Mini-Mental State Examination (MMSE-KC). The association between dental implants and cognitive function was analyzed by multiple linear regression. Sensitivity analysis was performed to test for potential bias. Results: The mean number of natural teeth in the study population was 9.50 (standard deviation [SD], 6.42), and the mean MMSE-KC score was 24.93 (SD, 3.55). In the simple univariate analysis, tooth replacement, age, sex, smoking status, alcohol consumption, body mass index, osteoporosis, number of natural teeth, periodontitis, chewing discomfort, tooth-brushing frequency, education level, monthly household income, participation in economic activity, living alone, and marital status had a significant impact on the association. After adjusting for confounders, the association between dental implants and cognitive function remained significant (B, 0.85; standard error, 0.40; p<0.05). Age, body mass index, periodontitis, tooth-brushing frequency, and education level were also significantly associated with cognitive function. The results of the sensitivity analyses were consistent with those of the primary analysis. Conclusions: Dental implants were associated with cognitive function in older adults living in the community. Dental implants as tooth replacements may play a role in preserving cognitive function.

• 대한치과교정학회지
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• 제49권5호
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• pp.279-285
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• 2019

Objective: This study evaluated the efficiency of anchorage provided by temporary anchorage devices (TADs) in maxillary bicuspid extraction cases during retraction of the anterior teeth using a fixed appliance. Methods: Patients aged 12 to 50 years with malocclusion for which bilateral first or second maxillary bicuspid extractions were indicated were included in the study and randomly allocated to the TAD or control groups. Retraction of the anterior teeth was achieved using skeletal anchorage in the TAD group and conventional dental anchorage in the control group. A computed tomography (CT) scan was performed after alignment of teeth, and a second CT scan was performed at the end of extraction space closure in both groups. A three-dimensional superimposition was performed to visualize and quantify the maxillary first molar movement during the retraction phase, which was the primary outcome, and the stability of TAD movement, which served as the secondary outcome. Results: Thirty-four patients (17 in each group) underwent the final analysis. The two groups showed a significant difference in the movement of the first maxillary molars, with less significant anchorage loss in the TAD group than that in the control group. In addition, TAD movement showed only a slight mesial movement on the labial side. On the palatal side, the mesial TAD movement was greater. Conclusions: In comparison with conventional dental anchorage, TADs can be considered an efficient source of anchorage during retraction of maxillary anterior teeth. TADs remain stable when correctly placed in the bone during the anterior tooth retraction phase.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제47권1호
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• pp.40-46
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• 2021

Marsupialization is widely used as a primary treatment modality for reducing size of large cysts. However, there is no recommendation for specific duration of marsupialization. In addition, Carnoy's solution usually is applied at the time of enucleation as a fixative agent. In this report, we present an appropriate marsupialization duration of ameloblastoma involving two unerupted teeth. In this present study, marsupialization using a Foley catheter was performed in two cases of ameloblastoma of the mandible involving two adjacent impacted teeth. Carnoy's solution was applied for 3-5 minutes after enucleation in both patients. Periodically during marsupialization, the size of the radiolucency was measured in panoramic view, and clinical examination was performed. No remarkable paresthesia or soft tissue injury was observed after application of Carnoy's solution or during follow-up. We recommend 12 to 16 weeks as an adequate marsupialization duration for a large ameloblastoma involving two impacted teeth based on increased radiopacity along the margins of the lesions. Poor oral hygiene was an issue after 12 weeks of marsupialization in one case. There were no remarkable complications with Carnoy's solution in either case. The Foley tube has a two-way system that is more effective for irrigating the cavity than is the conventional one-way system.

• 대한소아치과학회지
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• 제44권4호
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• pp.397-402
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• 2017

본 연구의 목적은 화성시에 거주하는 유치열기 어린이의 전치부 공극과 총생에 대해 알아보는 것이다. 한 명의 소아치과 전문의가 만 3 - 4세 유치열기 어린이들의 구강 내 임상 사진을 촬영하였으며, 400명 중 237명이 포함 기준을 충족하였다. 전치부 공극의 유무는 인접면 접촉의 유무로 판단하였다. 상악에서 생리적 치간 공극이 관찰되는 어린이는 47.3%였으며, 하악에서는 38.0%였다. 양악 모두에서 접촉 혹은 총생의 치열을 보이는 어린이는 43.5%였다. 여아보다 남아에서 생리적 치간공극이 존재하는 경우가 더 많았다. 상악에서는 영장류 공간이 발육공간에 비해 더 많이 발견되었으나, 하악에서는 그 차이가 적었다. 상악에서는 유중절치 사이에 공극이 있는 경우보다 유중절치와 유측절치 사이에 공극이 있는 어린이가 더 많았으며, 반면 하악에서는 유중절치 사이에 공극이 있는 어린이가 유중절치와 유측절치 사이 혹은 유측절치와 유견치 사이에 공극이 있는 어린이보다 많았다. 본 연구를 통해 3 - 4세 유치열기 어린이의 전치부 공극과 총생의 정도를 파악할 수 있었으며, 추후 더 많은 표본으로 조사가 필요할 것으로 사료된다. 유치열기의 전치부 공극 혹은 총생은 어린이 개인에 따라, 성별에 따라, 악궁에 따라, 치간 위치에 따라 다른 정도를 보이므로, 치과의사는 유치의 치관부를 수복할 때 이에 대한 인식 하에 치료를 시행하여야 한다.

• 대한장애인치과학회지
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• 제15권1호
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• pp.89-93
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• 2019

본 증례 보고는 기관 삽관 경험이 있는 조산아에서 상악 유전치의 발육장애가 나타난 증례이다. 본 증례들에서는 기관 삽관으로 인해 치관 형태 이상, 법랑질 결함, 맹출 지연이 나타났다. 또한 치배의 변위로 인한 맹출 경로 이상, 치근 만곡, 후속 영구치의 비정상적인 치근 형성도 나타났다. 이환 치아에 대해서는 예방적 수복치료 및 관리, 적절한 시기에 발치를 고려해야 한다. 소아치과의사는 삽관 경험이 있는 조산아에서 나타날 수 있는 상황에 대해 이해하고, 적절한 개입을 통해 구강 건강 증진을 도모해야 한다.

• 대한소아치과학회지
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• 제8권1호
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• pp.21-24
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• 1981

The author observed a case of ectopic erupted maxillary second premolars and impacted mandibular second premolars due to premature loss of the primary second molars. The treatments were done as follows: 1. In the maxilla, the teeth arrangement problem was corrected with removal of the ectopic erupted second premolars. 2. In the mandible, normal dentition was established with surgical removal of the left second premolar and removal of the permanent first molar in right side combined by orthodontic therapy.

• 대한치과의사협회지
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• 제4권1호
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• pp.25-26
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• 1963

By means of Alizarin zirconium stain method the fluoric reaction which showed in the case of deficient hard tissue was observed. Among the hard tissue. the fluoric density appesrs in the graduation that the largest is primary calcified matrix and least is secondany calcified matrix.