• 한국산학기술학회논문지
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• 제15권2호
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• pp.1010-1019
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• 2014

본 연구는 객관적인 국가차원의 국민건강영양조사 원시자료를 활용하여 만 14세에서 만 19세까지의 청소년을 추출하고 식품군별로 조사된 섭취빈도조사의 내용을 바탕으로 구강검진 조사의 항목으로 실시된 우식영구치수, 영구치우식유병자여부, 우식경험영구치수, 영구치우식경험여부등의 4가지 항목의 영향력 관계를 조사하였다. 우식영구치수, 영구치우식유병자 여부, 우식경험영구치 수, 영구치우식경험 여부등은 쌀과 배추 김치를 주식으로 하는 우리나라 식생활 문화에 가장 영향을 많이 받았고 쌀과 잡곡, 배추등의 채소와 과일류 등은 치아우식을 낮추는 영향을 주는 인자로 조사되었다. 쌀의 섭취 빈도가 많을수록 치아우식은 감소하는 것으로 나타났으며, 고기 생선 난류의 식품군에서는 멸치의 섭취 빈도가 많을 수록 치아우식은 감소하였고, 돼지고기와 소고기 등의 육류의 섭취 역시 치아우식의 발생을 감소시키는 것으로 나타났다. 특히 탄산음료와 패스트푸드 식품의 일종인 햄버거와 피자등의 섭취 빈도가 클수록 치아우식을 증가시키는 것으로 나타났다.

• 대한치과교정학회지
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• 제51권3호
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• pp.157-165
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• 2021

Objective: This study aimed to identify the clinical effectiveness of two different penetration depths of micro-osteoperforations (MOPs) on the rate of orthodontic tooth movement. Methods: Twenty-four patients requiring the removal of the upper first premolar teeth were selected and randomly divided into two groups. The control group participants did not undergo MOPs. Participants in the experimental group underwent three MOPs each at 4-mm (MOP-4) and 7-mm (MOP-7) depths, which were randomly and equally performed to either the left or right side distal to the canine. The retraction amount was measured on three-dimensional digital models on the 28th day of retraction. MOP-related pain was measured using a visual analog scale (VAS). Between-group statistical differences in the VAS scores were determined using an independent t-test and those in canine retraction were determined using analysis of variance and post-hoc Tukey test. Results: No significant difference was found between the MOP-4 (1.22 ± 0.29 mm/month) and MOP-7 (1.29 ± 0.31 mm/month) groups in terms of the canine retraction rate. Moreover, both the groups demonstrated a significantly higher canine movement than the control group (0.88 ± 0.19 mm/month). MOPs did not significantly affect the mesialization of the posterior teeth (p > 0.05). Moreover, the pain scores in the MOP-4 and MOP-7 groups were similar and showed no statistically significant difference. Conclusions: Three MOPs with a depth of 4 mm can be performed as an effective method to increase the rate of tooth movement. However, three MOPs with depths of 4-7 mm does not additionally enhance tooth movement.

• 대한치과교정학회지
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• 제51권6호
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• pp.407-418
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• 2021

Objective: To investigate differences in the heritability of skeletodental characteristics between twin pairs with skeletal Class I and Class II malocclusions. Methods: Forty Korean adult twin pairs were divided into Class I (C-I) group (0° ≤ angle between point A, nasion, and point B [ANB]) ≤ 4°; mean age, 40.7 years) and Class II (C-II) group (ANB > 4°; mean age, 43.0 years). Each group comprised 14 monozygotic and 6 dizygotic twin pairs. Thirty-three cephalometric variables were measured using lateral cephalograms and were categorized as the anteroposterior, vertical, dental, mandible, and cranial base characteristics. The ACE model was used to calculate heritability (A > 0.7, high heritability). Thereafter, principal component analysis (PCA) was performed. Results: Twin pairs in C-I group exhibited high heritability values in the facial anteroposterior characteristics, inclination of the maxillary and mandibular incisors, mandibular body length, and cranial base angles. Twin pairs in C-II group showed high heritability values in vertical facial height, ramus height, effective mandibular length, and cranial base length. PCA extracted eight components with 88.3% in the C-I group and seven components with 91.0% cumulative explanation in the C-II group. Conclusions: Differences in the heritability of skeletodental characteristics between twin pairs with skeletal Class I and II malocclusions might provide valuable information for growth prediction and treatment planning.

• Journal of Dental Anesthesia and Pain Medicine
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• 제15권3호
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• pp.121-128
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• 2015

Background: The authors studied the hemodynamic effect influent by using the novel high concentration of lidocaine HCl for surgical removal impacted lower third molar. The objective of this study was to evaluate the hemodynamic change when using different concentrations of lidocaine in impacted lower third molar surgery. Methods: Split mouth single blind study comprising 31 healthy patients with a mean age of 23 years (range 19-33 years). Subjects had symmetrically impacted lower third molars as observed on panoramic radiograph. Each participant required 2 surgical interventions by the same surgeon with a 3-week washout period washout period. The participants were alternately assigned one of two types of local anesthetic (left or right) for the first surgery, then the other type of anesthetic for the second surgery. One solution was 4% lidocaine with 1:100,000 epinephrine and the other was 2% lidocaine with 1:100,000 epinephrine. A standard IANB with 1.8 ml volume was used. Any requirement for additional anesthetic and patient pain intra-operation was recorded. Post-operatively, patient was instructed to fill in the patient report form for any adverse effect and local anesthetic preference in terms of intra-operative pain. This form was collected at the seven day follow up appointment. Results: In the 4% lidocaine group, the heart rate increased during the first minute post-injection (P < 0.05). However, there was no significant change in arterial blood pressure during the operation. In the 2% lidocaine group, there was a significant increase in arterial blood pressure and heart rate in the first minute following injection for every procedure. When the hemodynamic changes in each group were compared, the 4% lidocaine group had significantly lower arterial blood pressure compared to the 2% lidocaine group following injection. Post-operatively, no adverse effects were observed by the operator and patient in either local anesthetic group. Patients reported less pain intra-operation in the 4% lidocaine group compared with the 2% lidocaine group (P < .05). Conclusions: Our results suggest that a 4% concentration of lidocaine HCl with 1:100,000 epinephrine has better clinical efficacy than 2% lidocaine HCl with 1:100,000 epinephrine when used for surgical extraction of lower third molars. Neither drug had any clinical adverse effects.

• Journal of Periodontal and Implant Science
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• 제28권2호
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• pp.309-320
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• 1998

The periodontal health has been evaluated clinically by various epidemiological indices, and in researches by measurement of gingival crevicular fluid. Laser Doppler flowmetry is a reliable and objective method that allows immediate measurement of erythrocyte flux in approximately one cubic mm of the capillary bed without disturbing the tissues. The purpose of the present study was to determine whether human gingival blood flow was different according to measuring area, measuring time, and sex or not. Forty volunteers with good general and periodontal health, aged early twenties and unmarried, were selected. Laser Doppler flowmetry($floLAB^{(R)}$, Moor Instruments Ltd., England) was applied to measure the gingival blood flow of marginal gingiva, interdental papilla, attached gingiva and alveolar mucosa. The blood flow of interdental papilla was measured at 9-10 AM, 1-2 PM, and 5-6 PM. The difference of blood flow according to measuring area and measuring time was statistically analyzed by one way AOVA and Dunkan test, and the difference of blood flow between men and women was statistically analyzed by t-test. (1) Mean blood flow was significantly higher in alveolar mucosa than in the gingiva(p<0.05), and there was no significant difference in blood flow between marginal gingiva and interdental papilla(p>0.1). (2) Mean blood flow was significantly higher at 5-6 PM than at 9-10 AM and 1-2 PM(p<0.05). But there was no significant difference in gingival blood flow between 9-10 AM and 1-2 PM(p>0.1). (3) There was no significant difference in gingival blood flow between men and women(p>0.1). The above results suggest that the measurment of gingival blood flow using laser Doppler flowmetry may be clinically applicable to early determination of gingival inflammation and evaluation of healing status, but further studies are necessary to standardize and simplify the measuring procedure.

• 치위생과학회지
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• 제6권1호
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• pp.35-39
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• 2006

본 연구는 울산광역시 근무하는 치과위생사의 직무만족도를 파악하기 위하여 울산지역 일부 치과위생사를 대상으로 구조화된 자기기입식 설문지를 이용한 직접방문조사를 시행하여 총 77부의 자료를 수합하였다. SPSS 11.5를 이용하여 치과위생사의 인구통계학적 특성 및 직업관련 특성, 이직경험 유무에 대한 직무만족도, 각 직무만족도 세부 요인들 간의 차이와 각 직무만족도 세부요인들 간의 관련성을 분석하여 다음과 같은 결과를 얻었다. 1. 연령은 25세 이하가 53.2%, 결혼여부는 미혼이 79.2%, 학력은 전문대졸이 84.4%, 월 급여는 100만원 이상 150만원 미만이 69.9%로 가장 많았다. 2. 치과위생사의 직무만족 관련요인별 만족도는 직업적 긍지에 대한 만족도가 가장 높았고 보수에 대한 만족도가 가장 낮게 나타났다. 3. 치과위생사의 직무만족도 및 이직경험에서는 이직경험이 있는 경우가 없는 경우보다 근무환경만족도와 직업적 긍지에 대한 만족도, 현 근무지에 대한 만족도가 높게 나타나 이는 통계적으로도 높은 유의성을 나타내었다.(p = 0.003, p = 0.0.030, p = 0.000) 4. 각 세부직무만족도요인들은 모두 강한 정의 상관관계를 가지고 있었다. 5. 직무만족도를 종속변수로 한 회귀분석에서는 월급여가 150만원 이상 200만원 미만인 경우(p = 0.004), 연령은 31세 이상(p = 0.002), 근무지는 치과의원(0.037), 학력은 전문대졸이 (0.004) 직무만족도가 높게 나타나 통계적으로 유의하게 나타났다.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제27권1호
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• pp.64-71
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• 2016

Objectives: The objective of this study was to examine the effects of osmotic-controlled release oral delivery system methylphenidate on changes in regional cerebral blood flow (rCBF) in children with attention-deficit hyperactivity disorder (ADHD) using single photon emission computed tomography (SPECT). Methods: A total of 26 children with ADHD (21 boys, mean age: $9.2{\pm}2.05$ years old) were recruited. Each ADHD participant was examined for changes in rCBF using technetium-99m-hexamethylpropylene amine oxime brain SPECT before and after 8 weeks methylphenidate medication. Brain SPECT images of pediatric normal controls were selected retrospectively. SPECT images of ADHD children taken before medication were compared with those of pediatric normal controls and those taken after medication using statistical parametric mapping analysis on a voxel-wise basis. Results: Before methylphenidate medication, significantly decreased rCBF in the cerebellum and increased rCBF in the right precuneus, left anterior cingulate, right postcentral gyrus, right inferior parietal lobule and right precentral gyrus were observed in ADHD children compared to pediatric normal controls (p-value<.0005, uncorrected). After medication, we observed significant hypoperfusion in the left thalamus and left cerebellum compared to pediatric normal controls (p-value<.0005, uncorrected). In the comparison between before medication and after medication, there was significant hyperperfusion in the superior frontal gyrus and middle frontal gyrus and significant hypoperfusion in the right insula, right caudate, right middle frontal gyrus, left subcallosal gyrus, left claustrum, and left superior temporal gyrus after methylphenidate medication (p-value<.0005, uncorrected). Conclusion: This study supports dysfunctions of fronto-striatal structures and cerebellum in ADHD. We suggest that methylphenidate may have some effects on the frontal lobe, parietal lobe, and cerebellum in children with ADHD.

• 대한지역사회작업치료학회지
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• 제2권1호
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• pp.25-35
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• 2012

목적 : 본 연구는 농촌지역 노인을 대상으로 실시한 바우처사업 서비스 만족도와 여가시간사용을 조사한 자료를 바탕으로 지역사회거주 노인들의 서비스 선호도를 고려한 여가시간 활용방안을 모색하고자 하였다. 연구방법 : 본 연구는 부여군에 거주하고 있는 노인 71명을 대상으로 하였으며, 노인들의 특성에는 성별, 배우자 유무, 건강수준, 학력, 월 생활비, 자녀수, 직업 등의 변수들이 포함되었다. 대상자들의 자아존중감, 생활만족도, 삶의 질, 프로그램 만족도에 대한 조사는 설문지를 사용하였으며, t-검증과 상관분석을 이용하여 각 변인들 간의 상관관계를 확인하였다. 결과 : 대상자들의 여가활동에 대해 조사한 결과, TV시청하기, 친구만나기, 전화통화하기 등의 정적인 활동에 많은 시간을 소모하고 있었으며, 바우처 사업에 대한 만족도를 조사한 결과, 노인구강관리 서비스, 건강검진 서비스, 스포츠마사지 서비스 등 건강과 관련된 서비스에 만족도가 비교적 높게 나타났다. 결론 : 이 연구결과를 통하여 농촌지역 노인의 의미 있는 여가시간활용이 부족한 것을 확인할 수 있었으며, 건강관련 서비스에 대한 욕구가 강한 것을 확인 할 수 있었다. 그러므로 추후 여가활동에 대한 경험 및 지식습득의 기회를 제공하여 의미 있는 여가시간을 증진 할 필요가 있으며, 이를 바탕으로 노인들의 욕구에 부합하는 다양한 프로그램이 마련되어야 한다.

• 치위생과학회지
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• 제14권4호
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• pp.589-596
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• 2014

본 연구는 치면열구전색 하방의 우식이 이차우식에 미치는 영향을 평가하기 위해 DIAGNOdent를 이용하여 소구치 및 대구치 교합면 446부위를 4개의 군으로 분류하였고 상방에 치면열구전색을 시행한 뒤 이차우식을 유발시켜 DIAGNO dent로 재측정하였다. 또한 치과 업무 관련 종사자들을 대상으로 치면열구전색에 대한 인식도 및 실태를 조사하여 다음과 같은 결과를 얻었다. 시진 및 탐침 시 법랑질우식군에서 치면열구전색 후 이차우식이 가장 높게 나타났으며 초기우식군, 착색군, 건전부위군 순으로 통계적으로 유의한 차이를 보였다(p<0.05). 치면열구전색 전 치아우식증 진단 방법으로는 시진이 가장 높은 비율로 나타났다. 레이저 우식진단기에 대해 56.6%가 모르는 것으로 나타났으며, 91.6%가 보유하지 않은 것으로 나타났다. 치면열구전색 후 이차우식 발생의 원인은 치면열구전색제가 깨져서 하방에 우식이 생긴 경우가 가장 많았다. 이상의 결과를 종합하면, 치면열구전색 하방의 우식이 전색 후 이차우식 유발에 영향을 미치는 것으로 나타났다. 따라서 치면열구전색 후 이차우식을 예방하기 위해서는 열구 내 우식 정도를 정확하게 진단 평가하는 것이 중요하며, 보다 객관적으로 진단할 수 있는 우식 진단기기의 사용에 대한 교육 및 홍보가 필요할 것으로 생각된다.

• Asian Pacific Journal of Cancer Prevention
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• 제16권17호
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• pp.7547-7554
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• 2015

Background: The use of smokeless tobacco (SLT) among women is increasing in India, especially among those with limited education and resources. Preventing the initiation of SLT among women is critical since it has known negative consequences for oral and reproductive health. Most research on tobacco initiation in India focuses on adolescents. This paper addresses the unrecognized issues of post marital initiation among women of reproductive age, highlighting the importance of reproductive stages in women's tobacco initiation. The objective is to examine the correlates of SLT initiation among low income women in Mumbai from pre-marriage through early marriage, first pregnancy and beyond, using case examples to illustrate initiation during each of these stages. Materials and Methods: In 2011-2012, cross-sectional community level survey data were collected from a representative sample of 409 daily SLT-using married women aged 18-40 years in a low income community in Mumbai. Information on socio-demographics, initiation by reproductive stage, types of tobacco use, childhood exposure to tobacco, learning to use, and initiation influences and reasons were collected through a researcher-administered survey. Univariate and bivariate analysis assessed factors influencing initiation of SLT use by reproductive stage. In addition 42 narratives of tobacco use were collected from a purposive sample of pregnant and non-pregnant married women addressing the same questions in detail. Narratives were transcribed, translated, and coded for key concepts including initiation of tobacco use. Results: Thirty-two percent of women initiated SLT use before marriage, 44% initiated after marriage but before pregnancy, 18.1% initiated during their first pregnancy and the remainder started after their first pregnancy. Mean age of marriage among women in this study was 16 years. Younger women (i.e. age at time of the interview of less than 30 years) were 0.47 [95% CI (0.32, 0.87)] percent less likely to initiate after marriage than women aged more than 30 years. Women who got married before 18 years of age were 2.34 [95% CI (1.40, 3.93)] times more likely to initiate after marriage than their counterparts. Childhood exposure was a predictor for initiating SLT use prior to marriage but not after. Women reporting tooth and gum pain were 1.85 times more likely to initiate after marriage than their counterparts. Husband and neighbours were the most significant influences on post-marital initiation. Narratives highlighted differences in processes of initiation pre and post marriage and during pregnancy. Conclusions: Most tobacco prevention interventions are directed to adolescents in school. This study suggests that especially for low literate or illiterate women, school based interventions are ineffective. To be effective strategies to prevent SLT initiation must reach women in urban areas at or immediately after marriage and during their first pregnancy. Messages must negate culturally rooted beliefs about the health benefits of SLT in order to prevent initiation and onset of daily use.