STATEMENT OF PROBLEM: Screw loosening has been a common complication and still reported frequently. PURPOSE: The purpose of this study was to evaluate abrasion of the implant fixture and TiN coated abutment screw after repeated delivery and removal with universal measuring microscope. MATERIAL AND METHODS: Implant systems used for this study were Osstem and 3i. Seven pairs of implant fixtures, abutments and abutment screws for each system were selected and all the fixtures were perpendicularly mounted in liquid unsaturated polyesther with dental surveyor. After 20 times of repeated closing and opening test, the evaluation for the change of inner surface of implant and TiN-coated abutment screw, and weight loss were measured. Mann-Whitney test with SPSS statistical software for Window was applied to analyze the measurement of weight loss. RESULTS: TiN-coated abutment screws of Osstem and 3i showed lesser loss of weight than non-coated those of Osstem and 3i (P < .05, Mann-Whitney test). CONCLUSION: Conclusively, TiN coating of abutment screw showed better resistance to abrasion than titanium abutment screw. It was concluded that TiN coating of abutment screw would reduce the loss of preload with good abrasion resistance and low coefficient of friction, and help to maintain screw joint stability.
Collodion ; Friction ; Joints ; Tin ; Titanium ; Weight Loss

STATEMENT OF PROBLEM: Unlike screw-retention type, fixture-abutment retention in Locking taper connection depends on frictional force so it has possibility of abutment to sink. PURPOSE: In this study, Bicon(R) Implant System, one of the conical internal connection implant system, was used with applying loading force to the abutments connected to the fixture. Then the amount of sinking was measured. MATERIAL AND METHODS: 10 Bicon(R) implant fixtures were used. First, the abutment was connected to the fixture with finger force. Then it was tapped with a mallet for 3 times and loads of 20 kg corresponding to masticatory force using loading application instrument were applied successively. The abutment state, slightly connected to the fixture without pressure was considered as a reference length, and every new abutment length was measured after each load's step was added. The amount of abutment sinking (mm) was gained by subtracting the length of abutment-fixture under each loading condition from reference length. RESULTS: It was evident, that the amount of abutment sinking in Bicon(R) Implant System increased as loads were added. When loads of 20 kg were applied more than 5 - 7 times, sinking stopped at 0.45 +/- 0.09 mm. CONCLUSION: Even though locking taper connection type implant shows good adaption to occlusal force, it has potential for abutment sinking as loads are given. When locking taper connection type implant is used, satisfactory loads are recommended for precise abutment location.
Bite Force ; Fingers ; Friction ; Retention (Psychology)

PURPOSE: This study of secondary analysis aims to compare family management style according to severity in children with atopic dermatitis. METHODS: convenience sample of 109 Korean mothers caring for a child with atopic dermatitis, were recruited from the pediatric departments of two general hospitals in Seoul. Data were collected from November 1, 2015 to February 28, 2016. A structured self-report questionnaire was used. Data were analyzed using descriptive statistics, correlation analysis, and one-way ANOVA with IBM SPSS Version 22.0. RESULTS: For family management style, condition management effort, family life difficulty, and view of condition impact were significantly different according to the severity of the atopic dermatitis in these children. CONCLUSION: The findings indicate that family management strategies to enhance care of children with atopic dermatitis as well as members of the family should include these significant variables in a family-centered approach.
Child ; Dermatitis, Atopic* ; Hospitals, General ; Humans ; Mothers ; Seoul

Purpose: This study aimed to identify the mental fitness, perspective taking, attitude toward the elderly, and quantitative encephalogram among caregivers. Methods: In this mixed method research, 14 female caregivers at an elderly care facility in Y city were participated from December 1st to December 31st, 2019. Structured questionnaires were applied to measure general characteristics, mental fitness, perspective taking, and attitude toward the elderly. Brain waves were measured by quantitative encephalogram in the prefrontal lobe. High frequency and high level of care tasks were analyzed using content analysis. Results: According to analysis of brain waves, caregivers experienced high level of physical strain & stress and psychological distraction & stress.Mental fitness (p<.05) and perspective taking (p<.001) were associated with attitude toward the elderly.Moreover, physical strain & stress was associated with psychological distraction & stress (p<.05, p<.001). High frequency and high level tasks were excretion and position change & movement care related tasks, respectively. Conclusion These findings should be consider as an evidence for supporting care tasks based on concrete and objective understanding of caregivers using self-reported index as well as neurophysiological indicators including brain waves.

OBJECTIVES: Heart failure (HF) is a progressive syndrome that marks the end-stage of heart diseases, and it has a high mortality rate and significant cost burden. In particular, non-adherence of medication in HF patients may result in serious consequences such as hospital readmission and death. This study aims to identify predictors of medication adherence in HF patients. In this work, we applied a Support Vector Machine (SVM), a machine-learning method useful for data classification. METHODS: Data about medication adherence were collected from patients at a university hospital through self-reported questionnaire. The data included 11 variables of 76 patients with HF. Mathematical simulations were conducted in order to develop a SVM model for the identification of variables that would best predict medication adherence. To evaluate the robustness of the estimates made with the SVM models, leave-one-out cross-validation (LOOCV) was conducted on the data set. RESULTS: The two models that best classified medication adherence in the HF patients were: one with five predictors (gender, daily frequency of medication, medication knowledge, New York Heart Association [NYHA] functional class, spouse) and the other with seven predictors (age, education, monthly income, ejection fraction, Mini-Mental Status Examination-Korean [MMSE-K], medication knowledge, NYHA functional class). The highest detection accuracy was 77.63%. CONCLUSIONS: SVM modeling is a promising classification approach for predicting medication adherence in HF patients. This predictive model helps stratify the patients so that evidence-based decisions can be made and patients managed appropriately. Further, this approach should be further explored in other complex diseases using other common variables.
Heart ; Heart Diseases ; Heart Failure ; Humans ; Medication Adherence ; New York ; Patient Compliance ; Patient Readmission ; Support Vector Machine ; Surveys and Questionnaires

To evaluate the nephrotoxicity of cisplatin, serum levels of sodium, potassium, chloride, calcium, phosphorous, magnesium, BUN, creatinine and creatinine clearance were measured before and after administration of cisplatin in 18 cases of patients with malignant neoplasm. The results were as follows: 1) Serum calcium, magnesium, potassium and BUN levels were changed after cisplatin administration, but those changes were not statistically significant. 2) The mean value of creatinine clearance was not decreased significantly after treatment with cisplatin. 3) Acute renal failure was developed in one case, and four cases of hypocalcemia, hypomagnesemia were also detected after administration of cisplatin.
Acute Kidney Injury ; Calcium ; Calcium Chloride ; Cisplatin* ; Creatinine ; Humans ; Hypocalcemia ; Magnesium ; Potassium ; Sodium

BACKGROUND: Unlike traditional quantitative study, this qualitative study is designed to understand andexplore the experiences of nursing students's communication in clinical nursing practicum.METHODS: Participants were 15 nursing students from a university in Seoul who were selected by purposive sampling. They had been participated in clinical nursing practicum more than one semester. Data were collected through in-depth interviews and observation from May 29, 2017 to June 8, 2017. Collected data were analyzed by Colaizzi's phenomenological methodology.RESULTS: As a result, 5 theme clusters were derived as follows: 1) the modeling of communication, 2) treatment as a student nurse, 3) respect as a nurse, 4) trauma after communication, and 5) sympathy in communication. This study identified the desire for nursing professionalism, psychological difficulties as negative emotionality, as well as positive emotionality of nursing students in clinical practicum.CONCLUSION: We should consider a nursing curriculum to prepare and improve the communication of nursing students before participating in clinical practicum. The concrete and systematic communication education would be useful for nursing students to participate clinical practicum effectively.
Curriculum ; Education ; Humans ; Nursing ; Preceptorship ; Professionalism ; Seoul ; Students, Nursing

Purpose: This study aimed to define and clarify learning transfer in nursing. Methods: This study used a hybrid model to analyze the concept of learning transfer in nursing through three phases. For the theoretical phase, learning transfer attributes were identified through a scoping literature review. In the fieldwork phase, in-depth focus group interviews were conducted to develop attributes. Purposive sampling was performed with ten participants(five nursing students, two nurses, three nursing faculty members). In the analysis phase, the attributes and final analysis of learning transfer in nursing were extracted and integrated from the previous two phases. Results: According to the analysis, learning transfer was represented in two dimensions with eight attributes. The development of competency dimension had three attributes: 1) theory acquisition, nursing skills, professional attitude, 2) integration, and 3) analysis competency. The competency change dimension had five attributes: 1) appropriateness in patient care, 2) proficiency in patient care, 3) satisfaction, 4) achievement, and 5) confidence. Conclusion The concept analysis might provide a basic understanding of learning transfer, a development framework toward a measurement of nursing learning transfer and effective educational nursing strategies.

PURPOSE: This study aimed to identify the effects of the mother-medical staff partnership on mothers’ condition management ability for children with chronic allergic diseases. METHODS: A total of 109 Korean mothers caring for a child with a chronic allergic diseases, identified according to the allergic march, such as food allergy, atopic dermatitis, allergic rhinitis, and allergic asthma, were recruited from the pediatric department of a general hospital in Seoul through convenience sampling. Data were collected using structured self-reported questionnaires from August 1, 2017 to October 31, 2017. and analyzed by descriptive statistics and multiple regression using SPSS version 22.0. RESULTS: The Mother-medical staff partnership had a statistically significant effect on mothers' condition management ability for children with chronic allergic diseases(p < .05). Among the general characteristics, satisfaction with nursing services had a statistically significant effect on mothers’ condition management ability(p < .05). CONCLUSION: In conclusion, strategies to support children with chronic allergic diseases, as well as their caregivers, should consider the mother-medical staff partnership as part of a family-centered approach.
Asthma ; Caregivers ; Child ; Chronic Disease ; Dermatitis, Atopic ; Disease Management ; Family Nursing ; Food Hypersensitivity ; Hospitals, General ; Humans ; Medical Staff ; Mothers ; Nursing Services ; Rhinitis, Allergic ; Seoul

Purpose: This study aimed to measure COVID-19 stress and the quantitative electroencephalography (QEEG) stress quotient and identify the coping styles of face-to-face service industry employees during the COVID-19 pandemic. Methods: This cross-sectional study administered structured questionnaires consisting of sections on general characteristics, COVID-19 stress, and coping style for stress to 21 face-to-face service industry employees between April 1 and April 18, 2021. The physical tension & stress quotient and psychological distraction & stress quotient were measured in the prefrontal lobe with QEEG. Results: Emotional easiness (r=.62, p=.002) and escape-avoidance (r=.55, p=.009) as a passive coping style were associated with COVID-19 stress, and seeking social support as an active coping style was associated with the left physical tension & stress quotient (r=.47, p=.031). Conclusion These findings provide evidence regarding the objective status of the mental health of face-to-face service industry employees using both a self-reported scale and neuroscientific indicators, including brain quotients.