• 융합정보논문지
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• 제11권6호
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• pp.171-180
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• 2021

본 연구는 노인들의 구강관리행태, 구강건강관리 자기효능감, 사회적지지가 주관적 구강건강수준에 미치는 영향을 알아보기 위해 실시하였다. 자료조사는 2019년 9월 17일부터 2019년 11월 22일까지 대전광역시와 충청남도 일부지역에 거주하는 노인들을 대상으로 하였으며, 수집된 자료는 𝑥²-test, Pearson 상관분석, 로지스틱 회귀분석으로 분석하였다. 조사결과 주관적 구강건강수준은 틀니를 사용하고 있지 않은 경우 3.242배, 일일 칫솔질 횟수가 3회 이상인 경우 2.339배 증가하였으며, 구강건강관리 자기효능감과 사회적 지지가 각각 1.755배, 1.192배 증가함에 따라 주관적 구강건강수준도 증가하였다. 이상의 결과를 토대로 노인들의 주관적 구강건강수준의 증진을 위해서는 틀니관리방법과 칫솔질교습 등의 구강보건교육의 기회를 확대하고, 구강건강관리 자기효능감과 사회적 지지를 강화시킬 수 있는 정책 마련이 필요하다.

• Imaging Science in Dentistry
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• 제51권2호
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• pp.129-136
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• 2021

Purpose: This study investigated the effects of 1 year of training on imaging diagnosis, using static ultrasonography (US) salivary gland images of Sjögren syndrome patients. Materials and Methods: This study involved 3 inexperienced radiologists with different levels of experience, who received training 1 or 2 days a week under the supervision of experienced radiologists. The training program included collecting patient histories and performing physical and imaging examinations for various maxillofacial diseases. The 3 radiologists (observers A, B, and C) evaluated 400 static US images of salivary glands twice at a 1-year interval. To compare their performance, 2 experienced radiologists evaluated the same images. Diagnostic performance was compared between the 2 evaluations using the area under the receiver operating characteristic curve (AUC). Results: Observer A, who was participating in the training program for the second year, exhibited no significant difference in AUC between the first and second evaluations, with results consistently comparable to those of experienced radiologists. After 1 year of training, observer B showed significantly higher AUCs than before training. The diagnostic performance of observer B reached the level of experienced radiologists for parotid gland assessment, but differed for submandibular gland assessment. For observer C, who did not complete the training, there was no significant difference in the AUC between the first and second evaluations, both of which showed significant differences from those of the experienced radiologists. Conclusion: These preliminary results suggest that the training program effectively helped inexperienced radiologists reach the level of experienced radiologists for US examinations.

• Journal of Periodontal and Implant Science
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• 제51권3호
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• pp.163-178
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• 2021

Purpose: The aim of this study was to evaluate clinical factors affecting the longevity of fixed retainers and the influence of fixed retainers on periodontal health in periodontitis patients. Methods: In total, 52 patients with at least 2 years of follow-up after periodontal and orthodontic treatment were included in this study. After scaling and root planing, orthodontic treatment with fixed appliances or clear aligners was performed. Fixed retainers with twist-flex stainless steel wires were bonded to the palatal or lingual sides of anterior teeth. Changes in clinical parameters, including the plaque index, gingival index, calculus index (CI), probing pocket depth, and radiographic bone levels, were evaluated before bonding of fixed retainers and at a 12-month follow-up. Cumulative survival rates (CSRs) for retainer failure were evaluated according to sex, site, CI, stage of periodontitis, and the severity of the irregularity with the log-rank test and hazard ratios (HRs). Results: Twelve months after bonding of fixed retainers, improvements were observed in all clinical parameters except CI and radiographic bone gain. The overall CSR of the retainers with a CI <1 at the 12-month follow-up after bonding of fixed retainers was significantly higher than that of the retainers with a CI ≥1 at the 12-month follow-up (log-rank test; P<0.001). Patients with stage III (grade B or C) periodontitis had a higher multivariate HR for retainer failure (5.4; 95% confidence interval, 1.22-23.91; P=0.026) than patients with stage I (grade A or B) periodontitis. Conclusions: Although fixed retainers were bonded in periodontitis patients, periodontal health was well maintained if supportive periodontal treatment with repeated oral hygiene education was provided. Nonetheless, fixed retainer failure occurred more frequently in patients who had stage III (grade B or C) periodontitis or a CI ≥1 at 12-month follow-up after bonding of fixed retainers.

• 대한통합의학회지
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• 제10권1호
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• pp.149-155
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• 2022

Purpose : This study investigated the effects of wearing a mask and different mask filters on the respiratory function of stroke patients. Methods : A total of 15 stroke patients were selected according to the inclusion and exclusion criteria. The respiratory functions were compared between participants with and without masks and among respiratory functions with three different mask filters. The order of using masks was non-wearing masks, Dental masks, KF80 masks, and KF94 masks; the difference in respiratory volumes among these conditions were measured. For accuracy of the measurement, sufficient education on the respiratory measurement method was provided to the researcher, and the heart rate of the participants was estimated to confirm their stability before the measurements. To ensure accuracy, the subjects were educated on the researchers' respiratory measurement methods. Each measurement was followed by 10 min breathing stability before replacing the next mask. Results : The results of this study showed that the difference in respiratory functions, including forced vital capacity (FVC), forced expiratory volume in the first second (FEV₁), and maximal voluntary ventilation (MVV), in stroke patients was statistically significant among different masks (p<.05). Afterwards, the values of FVC, FEV₁, and MVV in stroke patients wearing masks were significantly lower than those of the non-masked control group (p<.05). The difference in respiratory functions with different mask filters showed no statistical significance (p<.05). Conclusion : This study showed that participants wearing any of the masks presented a lower respiratory function than that of those without using masks; additionally, no difference in respiratory functions was observed with differences in mask filters. Therefore, wearing a mask for a prolonged period is confirmed to affect breathing in stroke patients with weak respiratory function.

• 운동영양학회지
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• 제25권4호
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• pp.54-58
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• 2021

[Purpose] Deleted in breast cancer 1 (DBC1) ablation causes obesity, and stearoyl-CoA desaturase 1 (SCD1) induces the biosynthesis of monounsaturated fatty acids. This study examined whether voluntary wheel running (VWR) alters SCD-1 and DBC1 protein levels in the liver of leptin-deficient ob/ob mice. [Methods] Twenty-five Ob/Ob mice were divided into two groups (ob/ob-Sed and ob/ob-Ex). The expression of DBC1 and SCD1 in the mouse liver was determined using western blotting. [Results] After 10 weeks, VWR significantly reduced body weight without affecting the fatty acid synthase and CD36 protein levels. The average daily running distance was 4.0±1.0 km/day. This improvement was associated with changes in the hepatic SCD1 and DBC1 levels. Hepatic SCD-1 protein levels increased significantly, and DBC1 protein levels decreased in ob/ob-Sed animals. On the other hand, VWR inhibited the obesity-induced increase in SCD1 expression and impaired the obesity-induced decrease in DBC1 expression in the liver of leptin-deficient ob/ob mice. [Conclusion] This is the first study showing that VWR has strong effects on hepatic SCD1 and DBC1 in ob/ob mice, and provides key insights into the effects of exercise on obesity.

• 한국융합학회논문지
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• 제12권11호
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• pp.127-134
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• 2021

본 연구는 청소년의 구강건강 특성이 주관적 행복에 미치는 요인을 분석하고자 청소년건강행태조사(제16차, 2020년)를 이용하여 로지스틱 회귀분석 하였다(54,948명). 주관적 행복은 일반적 특성(성별, 학년, 학업성적, 경제수준, 거주형태, 자살생각, 음주경험, 흡연경험, 어머니 학력)의 모든 변수에서 유의한 차이를 보였고 구강건강 특성(칫솔질 횟수, 점심식사 후 칫솔질, 외상, 통증, 잇몸출혈 경험)에 따라서 유의미한 차이를 보였다. 주관적 행복에 미치는 융합 요인은 칫솔질 횟수(2회(OR=1.45), 3회(OR=1.53)), 점심식사 후 칫솔질(OR=1.19), 실란트경험(OR=1.08), 통증(OR=0.73), 잇몸출혈 경험(OR=0.74)이었다. 이 연구는 청소년의 주관적 행복을 증진시키기 위한 방안 연구에 기초자료로 활용될 것으로 사료된다.

• 융합정보논문지
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• 제12권2호
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• pp.163-173
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• 2022

본 연구 목적은 비의료직 병원 근로자들의 구강건강 관련 삶의 질에 미치는 위험요인을 탐색하고자 한다. 연구 방법은 수도권 소재의 일부 대학병원 근로자 608명을 대상으로 2021년 4월 20일 ~ 7월 30일까지 설문조사를 실시하였다. 연구 도구로는 근로손실, 구강건강 상태, 구강건강 관련 삶의 질 문항을 조사하였다. 분석방법은 독립 표본 t-test, one-way ANOVA test, 위계적 회귀분석을 시행하였다. 외생변수 통제 결과 성별(β=0.108), 전신질환(β=0.136), 구강건강수준(β=0.201), 구강건강 상태(β=0.463)는 구강건강 삶의 질에 영향을 미치는 것으로 나타났다. 비의료직 병원 근로자를 위한 정기적인 구강보건교육이 활성화된다면 구강건강 및 근로 증진에 큰 기여를 할 수 있을 것이다.

• Advances in materials Research
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• 제12권4호
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• pp.263-271
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• 2023

In this study, AA1060/Alumina composites were fabricated by combined stir casting and accumulative press bonding (APB). The APB process was repeated up to six press bonding steps at 300Ċ. As the novelty, potential dynamic polarization in 3.5Wt% NaCl solution was used to study the corrosion properties of these composites. The corrosion behavior of these samples was compared and studied with that of the annealed aluminum alloy 1060 and versus the number of APB steps. So, as a result of enhancing influence on the number of APB process, this experimental investigation showed a significant enhancement in the main electrochemical parameters and the inert character of the Alumina particles. Together with Reducing the active zones of the material surfaces could delay the corrosion process. Also, at higher number of steps, the corrosion resistance of composites improved. The sample produced after six number of steps had a low corrosion density in comparison with high corrosion density of annealed specimens. Also, the scanning electron microscopy (SEM), was used to study the corrosion surface of samples.

• Restorative Dentistry and Endodontics
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• 제48권3호
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• pp.31.1-31.11
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• 2023

Objectives: This retrospective cohort study examined the incidence of interappointment emergencies during multiple-visit molar root canal treatments conducted by undergraduate students. Treatments performed without the use of intracanal medicament were compared to treatments that incorporated calcium hydroxide as an intracanal medicament. Materials and Methods: Interappointment emergencies, defined as instances of pain or swelling that required the patient to make an unscheduled follow-up visit, were recorded for up to 2 months after the intervention. To avoid the influence of obturation on the observed incidence of emergency visits, only unscheduled visits occurring between the start and end of the root canal treatment were included. Results: Of the 719 patients included in this study, 77 (10.7%) were recorded as experiencing interappointment emergencies. Of these emergencies, 62% occurred within 2 weeks following the most recent intervention. In the group of patients who did not receive intracanal medicament, the incidence of interappointment emergencies was 11.9% (46 of 385 patients). In comparison, this rate was 9.3% (31 of 334 patients) among those who received calcium hydroxide as an intracanal medicament (odds ratio, 1.33; 95% confidence interval, 0.82-2.15; p = 0.249). Conclusions: Interappointment emergencies may arise at any point during root canal treatment, but they most commonly occur within the first 2 weeks following intervention. The omission of intracanal medicament in multiple-visit molar root canal treatments, performed by undergraduate students, did not significantly increase the incidence of these emergencies.

• 보건의료생명과학 논문지
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• 제10권1호
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• pp.157-162
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• 2022

흡연은 음주와 더불어 치주질환을 유발하는 원인 인자로 알려져 있으나, 흡연여부에 따른 구취와 구강 내 분포하는 미생물을 조사한 연구는 현재 매우 미비한 상태이다. 본 연구에서는 대학생을 대상으로 흡연자 30명, 비흡연자 30명을 선정하였다. 구강질환과 관련한 Streptococcus mutans 와 Prevotella intermedia 균들은 흡연자에서 30%, 비흡연자에서 7%로 흡연자에서 더 많이 검출되었으며, 1일 칫솔질 3회 이하에서 20%로 검출되어 통계적으로 유의하였다. 수분섭취량과 구취, 구강 미생물에서 차이를 확인한 결과 구강 미생물 중 P. intermedia는 통계적으로 유의한 차이가 있는 것으로 분석되었다(p<0.05). P. intermedia는 비흡연자보다 흡연자에서 세균이 더 검출되어 유의하였다(p<0.05). 지속적인 흡연은 구강을 직접적으로 자극하여 비흡연자에 비해 구강질환을 유발할 수 있는 세균이 우세하게 나타날 수 있으므로 흡연은 균주와 함께 구강 내 환경을 악화시켜 구강질환을 유발하는 원인임을 상기시켜 경각심을 주고, 더 나아가 학생들의 금연에도 긍정적 효과를 끼칠 것으로 기대한다.