• 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.

• 한국산학기술학회논문지
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• 제12권1호
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• pp.170-180
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• 2011

본 연구의 목적은 튜터링 프로그램에 참여한 D대학 학생들의 일반적 특성과 연령에 따른 자기조절 학습능력의 차이와 튜터와 튜티의 자기조절 학습능력의 차이를 인지조절과 동기조절 및 행동조절로 분류, 조사하여 효율적인 튜터링 프로그램 운영에 필요한 기초자료를 확보하기 위한 것이다. 2010년 4월 26일부터 6주간 실시된 튜터링 프로그램에 참여한 15개 학과 대학생 200명을 대상으로 자기조절 학습능력에 관한 설문지를 배포하여 자기기입식 응답법으로 응답한 183명의 자료를 조사하였다. 연구결과 참여자 중 20세이상의 대학생들은 자기조절학습능력 중 조직화, 메타인지전략의 사용, 계획, 자아효능감, 학업시간관리 능력이 유의 하게 높았다(p<0.05). 또한 튜터는 튜티에 비하여 인지전략의 사용, 시연, 조직화, 메타인지전략의 사용, 계획, 점검, 숙달목적지향성, 자아효능감, 성취가치, 행동통제와 도움을 구하기 능력이 높았다(p<0.05). 결론적으로 튜터링 프로그램에 참여한 학생들이 1~2년의 학습과정을 통해 전반적인 자기조절학습능력이 높게 나타났음을 확인할 수 있다. 따라서 전문대학에서는 상대적으로 자기조절 학습능력이 부족한 신입생 및 복학생들을 대상으로 상대적인 자기조절 학습능력이 우수한 튜터를 양성하여 튜터링 프로그램과 같은 양질의 학생지원 프로그램을 지원할 필요가 있으며, 향후 성적이 우수한 선배가 후배들을 지도할 수 있는 학습 환경을 제공하고, 다양한 프로그램을 연구, 개발한다면 튜터링 프로그램이 점차 차별화되고 효율적인 자기 조절 학습능력향상을 도모할 수 있을 것으로 사료된다.

• 기본간호학회지
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• 제2권2호
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• pp.115-130
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• 1995

The incidence of oral complications among adult cancer patients undergoing chemotherapy varies from 12 to 80%. Adequate oral hygiene has been shown to be important in prevention of oral complication and an essential role is reserved for the nursing staff. These considerations prompted the decision to survey by means of a questionaire, the nurses who give care to cancer patients. The Questions were included multidisciplinary treatment, inspection skill, nursing intervention, nursing education, problem in mouth care, solution for problem solving. - Results are fellow : 1. A total of 116 of the nurses returned the questionaire 2. According to 88.2% of the respondents, the policy with regard to oral-hygine is determined by the physician and the nurse. 62.1% of nurses do not consult the dentist When oral complication is occured. 3. In only 34.5% of case was a penight used to provide the necessary extra illumination nursing Inspection of oral cavity. 4. Frequency of oral complications observed by the respondents is that they observed complications in < 25% of patients. The nature of the complication varied from ulcer, stomatitis, infection, dry mouth, candidiasis, herpes simplix, bleeding. 5. Percentages of respondents who use the intervention indicated 1) to prevent oral complication : 0.9% normal saline gargling(44%), 0.02% chlorhexidine gargling, oral dressing(38.8%), observation, nutrition, restriction of alcohol and tabaco(23.2%) 2) to deal with the early symptoms 0.9% normal saline gargling (47.4%), cryotherapy(37.9%), 0.02% chlorhexidine gargling(20.7%) 3) to help alleviate severe complications : dental consult, holding the chemotherapy(34.5%), 0.9% normal saline gargling(31.1%), cryotherapy(18.0%) 6. According to 70% of the respondents, insufficient attention is given to oral complication during nursing education classes only 8.6% said that both the theory and the practical aspects had been deal with in sufficient detail during their training. The results of the survey indicate thatoral care in cancer patients undergoing chemothrapy has a number of problem. There are not enough dentist to provide the necessary care for patients undergoing chemotherapy. The expertise of the nurses with respect to the pathogenesis of the complication is limited. In the training of nurses, additional attention to oral examinations and oral hygine is warranted. The care of patients should be the responsibility of a multidisciplinary team approach. The nurse occupies a key position with in this team, which includes the medical oncologist, a dentist.

• 생명과학회지
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• 제19권10호
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• pp.1352-1359
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• 2009

본 연구는 장시간의 고강도 트레드밀 운동이 호흡기계의 생리를 가장 잘 반영하는 기관지 폐포계에 미치는 생리학적 효과를 규명하기 위해 실시되었다. 랫트를 대상으로 매일 8주간 운동시킨 결과 60분 및 120분 운동 그룹군은 대조군(비운동군)과 30분 운동군보다 체중이 유의하게 낮았으며 운동전보다 체중증가율도 높지 않았다. 기관지 폐포세척액 내 총 백혈구수는 세 운동군(30분, 60분, 120분) 모두 대조군보다 유의하게 높았다. 호중구수는 대조군에 비해 30분군과 120분군은 유의하게 증가하였고 60분군은 감소하였으며 30분군이 가장 높았다. 림프구수는 세 운동군 모두 대조군에 비해 유의하게 높았고 120분군이 가장 높았다. 대식세포(단구) 수는 세군 모두 대조군보다 높았고 120군이 가장 높았다. 기관지폐포액 내 인터루킨-6 농도는 대조군보다 30분군은 낮았고 60분과 120분군은 높았다. 그러나 인터루킨-10과 인터페론 감마 농도는 세 운동군 모두 대조군에 비해 유의하게 낮았다. 산화질소(nitric oxide) 농도는 세 운동군 모두 대조군보다 유의하게 높았다. 본 연구의 결과들은 1시간 이상의 고강도 트레드밀 운동은 기관지 폐포 내 백혈구 분포도에 변화를 유도하고 염증성 사이토카인 및 산화성질소 농도의 증가와 항염증성 사이토카인 농도의 감소와 같은 유해한 효과를 일으킬 수 있음을 시사하고 있다.