• Restorative Dentistry and Endodontics
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• v.31 no.1
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• pp.11-19
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• 2006

The purpose of this study was to compare and evaluate the shaping abilities of various hybrid instrumentation method using constant tapered file systems with $ProTaper\^{(R)}$ S1 and the difference between experts and inexperienced clinicians in use of NiTi file. Three hybrid methods used in this study were composed of $ProTaper\^{(R)}\;S1\;and\;K-Flexofile\^{(R)}\;(group S),\;ProTaper\^{(R)}\;S1\;and\;HeroShaper\^{(R)}\;(group\;H),\;and\;ProTaper\^{(R)}\;S1\;and\;ProFile\^{(R)}\;(group\;P)$respectively. The $ProTaper\^{(R)}$-alone method (group C) was introduced as a control group. After canal preparation, the lapse of time was recorded. The images of pre- and post-operative canal were scanned and superimposed. Amounts of instrumented canal widths and centering ratio were measured at apical 1, 2 and 3 mm levels and statistical analysis was performed In this study. both of the group C and S took more time to prepare canals than other groups, Inexperienced operators required more time for the entire preparation with the groups C and H than the experienced (p<0.05). And the centering ratio of group P were preferable to $ProTaper\^{(R)}$-alone method or the hybrid technique using stainless steel files. As such, within experienced operators, group H also showed better results in addition to the group P. Under these condition, the hybrid methods of each the $ProFile^{(R)}$ system and $HeroShaper^{(R)}$ with ProTaper are recommendable comparative to $ProTaper\^{(R)}$-alone method. According to the results, the hybrid instrumentation method is a more appropriate method of canal preparation than single file system for narrow or curved canals.

• Journal of the korean academy of Pediatric Dentistry
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• v.39 no.2
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• pp.174-180
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• 2012

In case of an immature tooth with necrotic pulp, regeneration of pulp tissue into a canal would be the ideal outcome. It may be capable of promoting the continuation of normal root development. Platelet-rich fibrin has been suggested as a potentially ideal scaffold for regenerative endodontic treatment. Immature permanent teeth of young children were diagnosed with pulp necrosis and apical abscess as the result of clinical and radiographic examination. After removal of necrotic pulp, canal was irrigated with 5.25% NaOCl and dried with paper point. A triple antibiotic mixture was placed in canal space in 3 weeks. After removal of the antibiotic mixture, the platelet-rich fibrin was injected into the canal space with MTA placed directly over the platelet-rich fibrin clot. The coronal region was restored by composite resin. On the basis of short-term results of the present 3 cases, regeneration of vital tissues appears to be possible in a tooth with necrotic pulp and a periapical lesion. Also, platelet-rich fibrin proves to be potentially an ideal scaffold for this procedure. Therefore, long-term clinical observation and examination about this treatment using platelet-rich fibrin in immature permanent teeth of young children are considered to be necessary.

• Korean Journal of Clinical Laboratory Science
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• v.55 no.3
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• pp.184-194
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• 2023

In this study, we investigated whether p-anisaldehyde (PAA), the main component of essential oils derived from anise seeds, influences the differentiation of mouse C2C12 myoblasts. Cells were induced to differentiate over 5 days using a differentiation medium with or without PAA (50 or 200 mg/mL). Myotube length and diameter were measured, and the expressions of myogenic markers (myoblast determination protein 1, myogenin, myocyte enhancer factor 2, muscle creatine kinase, and myosin heavy chain) and atrophy-related genes (atrogin-1 and muscle ring finger-1 [MuRF-1]) were assessed by quantitative real-time polymerase chain reaction. Additionally, protein kinase B (Akt) phosphorylation was monitored by western blotting. PAA significantly induced the formation of smaller and thinner myotubes and reduced myogenic marker expression. Furthermore, PAA increased the expressions of atrogin-1 and MuRF-1 and simultaneously reduced Akt phosphorylation. Our findings indicate that PAA inhibits the myogenic differentiation of C2C12 cells by reducing the phosphorylation and activation of Akt.

• Journal of muscle and joint health
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• v.20 no.2
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• pp.151-160
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• 2013

Purpose: The purpose of this study was to identify the effect of type of body shape perception on health concern, depression, dietary restriction and exercise practice in university students. Methods: A descriptive design was used. Data were collected from 308 university students by using structured questionnaires. Results: The results showed that 65.6% of the students believe that they are overweight. There are no differences in health concern, depression, and exercise practice among the skinny perception group, satisfaction group, and obesity perception group. However, there was a significant difference in dietary restriction among the three groups (p<.001). The type of body shape perception was significantly associated with dietary restriction (p=.007). Conclusion: Integrated and effective interventions are necessary for university students to establish healthy body image and learn healthy weight control.

• Journal of muscle and joint health
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• v.22 no.2
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• pp.114-120
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• 2015

Purpose: The purpose of this study was to identify factors associated with trust in health care professionals among patients with rheumatoid arthritis. Methods: Subjects for this study were 247 patients registered in general hospitals and the period of data collection was from February 25 to May 20, 2014. The data were analyzed with t-test and ANOVA. Results: The mean of trust in health care professionals was 3.11 in patients. There were significant differences in trust in health care professionals by age, marriage, and executing exercise of patients with rheumatoid arthritis. Conclusion: Trust in health care professionals among patients with rheumatoid arthritis was important to manage rheumatoid arthritis. To promote trust in health care professionals among patients with rheumatoid arthritis, subjects' age, marriage state and executing exercise in their daily living should be considered.

• Journal of muscle and joint health
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• v.24 no.2
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• pp.119-129
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• 2017

Purpose: The purpose of this study was to understand the nursing care experience of Korean nurses dispatched to West Germany during 1960~1970s. Methods: Qualitative research using thematic analysis was done. The participants were 13 people who were 60~70 years old. The data were collected by in-depth and focus group interviews from January to June 2016. Results: The nursing experience of Korean nurses dispatched to west Germany were composed of 197 initial codes, 15 sub themes, 4 themes including "Challenging the possibilities", "Wandering in the sea without preparation", "Distinguishing between difference and discrimination", and "Balancing oneself in two chairs". Conclusion: In order for nurses to successfully move to another country, it is needed to educate the language and inform the nursing system and preliminary education on specific nursing activities.

• Journal of muscle and joint health
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• v.11 no.2
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• pp.176-186
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• 2004

Purpose: The purpose this research was to provide with basic data in the control of the sleep disorder found in the patients with fibromyalgia by analysing the main factors that affect that. Method: At two university medical center, appointed 171 out-patients diagnosed of fibromyalgia according to the conditions by American College of Rheumatology(1990). The research instruments used in this study were VAS Scale(Anxiety, fatigue, pain, joint stiffness and depression), physical activity family support, the number of tender points and Self-efficacy scale. In data analysis, SPSS 11.0 program was utilized and data were analyzed using descriptive statistics, Pearson's correlation coefficient and multiple regression. Result: The main factors that affect the sleep disorder of patients with fibromyalgia were fatigue, physical activity, and depressions which explained 46.2% of the sleep disorder. Conclusion: It has been confirmed that the regression equation model of this research may serve as a sleep disorder prediction factors in patients with fibromyalgia.

• Journal of muscle and joint health
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• v.24 no.3
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• pp.187-195
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• 2017

Purpose: The purpose of the study was to identify the attributes of rapport, their antecedents and consequences. Methods: Walker and Avant's method for concept analysis was used to analyze the concept. Articles published from January 2007 to May 2017 were searched through PubMed, CINAHL, and RISS databases using "rapport" as a keyword. Results: The attributes of rapport were as follows: 1) understanding; 2) sharing information; 3) empathy; 4) harmonious relationship. The antecedents of rapport were as follows: 1) effective communication skills; 2) relation-oriented attitude. The consequences of rapport were forming trust, therapeutic relationship, improvement of quality of care, increased patients satisfaction and increased nurses satisfaction. Conclusion: Rapport can be defined as a harmonious relationship that understand each other and share ideas and information.

• Journal of muscle and joint health
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• v.27 no.2
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• pp.112-121
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• 2020

Purpose: This study aims to determine the conceptual properties of work engagement in nursing professional groups, and to provide basic data for nursing personnel management. Methods: To identify a nurse's work engagement, data were analyzed according to Walker & Avant's concept analysis method. Results: The analysis identified four work engagement attributes in nursing professional groups, namely: vigour, dedication, absorption, and zest. Conclusion: To bolster nurses' engagement with their duties, it is necessary to provide opportunities and implement interventions such as incentive system in performance evaluation based on work engagement in nursing, appropriate education program, and positive work environment.

• Restorative Dentistry and Endodontics
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• v.14 no.1
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• pp.189-197
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• 1989

The purpose of this study was to observe the resulting canal shape after using hand, sonic and ultrasonic instrumentation. Thirty canals from extracted human upper or lower 1st and 2nd molars were divided into 3 groups: hand, sonic and ultrasonic instrumentation group. 10 canals of each group were individually prepared with one of three instrumentation methods. After instrumentation and histological processing, apical, middle and coronal third cross sections were examined on the roundness of the canal by microscope. The result were as follows. 1. All experimented groups showed no significant difference in canal roundness regardless of size and level of the canal. 2. Sonic air instrumentation groups revealed Significantly better canal roundness than ultrasonic groups at the middle third of the fine canal. 3. In ultrasonic instrumentation groups, the roundness of the large canal was significantly better than that of fine canal.