• Imaging Science in Dentistry
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• 제49권3호
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• pp.241-249
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• 2019

Ameloblastoma is a benign locally invasive tumor with a high tendency to recur. It is considered rare in the pediatric population, with most cases diagnosed in the third to fifth decades of life. Approximately 80% of ameloblastomas occur in the molar and ramus region of the mandible, while 20% of cases occur in the maxillary posterior region. This report presents a case of plexiform ameloblastoma in an uncommon location in an 8-year-old child. The lesion was initially thought to be a dentigerous cyst, based on its location and radiographic appearance. The clinical and radiographic features, histopathology, and treatment of solid, plexiform, maxillary ameloblastoma are reviewed, with an added emphasis on a literature review of ameloblastoma in children. This report emphasize the importance of long-term follow-up, since recurrence may occur many years after initial tumor removal.

• 한국기계가공학회지
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• 제18권1호
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• pp.52-58
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• 2019

Due to icing and snow, power transmission lines have asymmetric cross sections, and their motion becomes unstable. At this time, the vibration caused by the wind is called galloping. If galloping is continuous, short circuits or ground faults may occur. It is possible to prevent galloping by installing spacers between transmission lines. In this study, the transmission line is modeled as a mass-spring-damper system by using RecurDyn. To analyze the dynamic behavior of the transmission line, the damping coefficient is derived from the free vibration test of the transmission line and Rayleigh damping theory. The drag and lift coefficient for modeling the wind load are calculated from the flow analysis by using ANSYS Fluent. Galloping simulations according to spacer stiffness and interval are carried out. It is found that when the stiffness is 100 N/m and the interval around the support is dense, the galloping phenomenon is reduced the most.

• 대한한방부인과학회지
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• 제34권2호
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• pp.48-61
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• 2021

Objectives: This study was aimed to review the effect of acupuncture on endometriosis related pain in patients. Methods: Researchers searched data through 6 online databases up to November 2020. The data was limited to randomized controlled trial studies on endometriosis patients diagnosed with laparoscopy. Results: 7 Randomized controlled trials were included in this study. All of studies were published in Chinese, in China. Intervention of treatment group were composed of simple acupuncture and electroacupuncture. Intervention of control group were made up with mifepristone, herbal medicine and acupuncture. Outcome measurements were effective rate, serum Cancer antigen-125 (CA-125), Visual analogue scale (VAS)/pain score, and recurrence rate in 1 year. In all outcome measurements, treatment group were more effective than control group and it was statistically significant. Conclusions: Acupuncture therapy is effective in decreasing endometriosis related pain and preventing recurrence. However, because endometriosis is easy to recur, additional long-term research is needed.

• 한국군사과학기술학회지
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• 제25권2호
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• pp.196-209
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• 2022

Driving dynamic characteristics of semi-trailer loaded with precise equipments are very important to protect them from vibration, impact or other disturbances. In this paper, in order to identify the driving dynamic characteristics of the large scale semi-trailer equipped with swivel axle and hydropneumatic suspension unit, Dynamics Modeling & Simulation(M&S) were performed using general Dynamics Analysis Program(RecurDyn V9R2). The semi-trailer was modeled as two types - one is Multi Rigid Body Dynamics(MRBD) model, and the other Rigid-Flexible Body Dynamics(RFlex) one. The natural vibration mode and frequencies of semi-trailer body, acceleration of dummy-weight, pitch, roll and yaw of dummy-weight, swivel axle and hydropneumatic suspension cylinder support structure, and acting force of hydropneumatic suspensions etc. were obtained from the M&S. Additionally frequency analysis were performed using the data of behavior obtained from above M&S. Generally the quantitative results of RFlex are larger than them of MRBD in view of magnitude of the comparable parametric values.

• 대한소아치과학회지
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• 제48권4호
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• pp.484-489
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• 2021

소아 및 청소년의 치면의 흑색 착색은 통증이나 심각한 병적 상태를 유발하지 않지만 심미적인 단점으로 인해 환자가 사회적으로 위축되게 한다. 흑색 착색은 주기적인 전문가 치면세균막 관리 및 스케일링을 통해 쉽게 제거되나 수개월 이내에 재발하는 문제가 있다. 50%로 희석한 에센셜 오일 함유 가글액을 하루 2회씩 사용하는 것은 흑색 착색이 제거된 뒤에 재발하는 것을 예방할 수 있으며 이를 통해 처치의 빈도를 줄이면서 심미성을 개선할 수 있다.

• 사상체질의학회지
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• 제34권2호
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• pp.84-96
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• 2022

Introduction Chronic idiopathic urticaria in patients diagnosed with an unfavorable pattern in Soyangin and Taeumin based on Sasang medicine showed a significant improvement after herbal medicine treatment. Methods The patients had treatment with both herbal medication and antihistamine. We checked the patients' cutaneous manifestation, original symptoms, and the number of antihistamine doses in each visit. We evaluated the medical records retrospectively. Results After one month of treatment, the patients showed cutaneous manifestation relief. Each patient reduced and withdrew antihistamine at four moths and eight months respectively, and the cutaneous manifestation did not recur. We maintained the herbal medicine prescription until the origin symptoms improved. Throughout the subsequent follow-up, the patients showed both urticaria and the original symptoms in good condition without treatment. Discussion Sasang medicine treatment can be an effective treatment for chronic idiopathic urticaria and long-term management is necessary for an unfavorable pattern which can take more than 6 months.

• 항공우주의학회지
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• 제31권2호
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• pp.54-56
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• 2021

Atopic dermatitis is a condition that makes skin red and itchy. It is common in children but can occur at any age. Atopic dermatitis is chronic and tends to flare periodically. The pathogenesis of the disease has not yet been clearly elucidated but genetic predisposition, immunological dysfunction, and environmental factors are presumed to be involved in the pathogenesis. In general, it is difficult to cure, but as time passes, most of them heal naturally and the symptoms disappear, but the symptoms continue to recur. So, the basic treatment is to relieve the pruritus and prevent it from reoccurring. Treatment involves avoiding things that make the condition worse, daily bathing with application of moisturizing cream afterwards, applying steroid creams when flares occur, and medications to relieve itching sensation. Steroid pills or creams based on calcineurin inhibitors may occasionally be used if other measures are not effective. When examining a pilot with atopic dermatitis, the dermatitis condition, the treatment being used, and the side effects of the medications should be considered. This case involves an otherwise healthy applicant for the 1st class medical certification who has had atopic dermatitis.

• 대한유전성대사질환학회지
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• 제22권1호
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• pp.1-8
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• 2022

Long-chain fatty acid oxidation disorders (LC-FAOD) are an autosomal recessive inherited rare disease group that result in an acute metabolic crisis and chronic energy deficiency owing to the deficiency in an enzyme that converts long-chain fatty acids into energy. LC-FAOD includes carnitine palmitoyltransferase type 1 (CPT1), carnitine-acylcarnitine translocase (CACT), carnitine palmitoyltransferase type 2 (CPT2), very long-chain acyl-CoA dehydrogenase (VLCAD), long-chain 3-hydroxyacyl-CoA dehydrogenase (LCHAD), and trifunctional protein (TFP) deficiencies. Common symptoms of LC-FAOD are hypoketotic hypoglycemia, cardiomyopathy, and myopathy. Depending on symptom onset, the disease can be divided as neonatal period, late infancy and early childhood, adolescence, or adult onset, but symptoms can appear at any time. The neonatal screening test (NBS) can be used to identify the characteristic plasma acylcarnitine profiles for each disease and confirmed by deficient enzyme analysis or molecular testing. Before introduction of NBS, the mortality rate of LC-FAOD was very high. With NBS implementation as routine neonatal care, the mortality rate was dramatically decreased, but severe symptoms such as rhabdomyolysis recur frequently and affect the quality of life. Triheptanoin (Dojolvi^®), the first drug for pediatric and adult patients with molecularly confirmed LC-FAOD, has recently been approved by the US Food and Drug Administration in 2020. In this review, the diagnosis of LC-FAOD and treatment including triheptanoin are summarized.

• 한국응급구조학회지
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• 제26권2호
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• pp.61-71
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• 2022

Purpose: This experimental study compared the chest compression quality, muscle activity, and subjective fatigue of paramedic students who did or did not wear a mask. Methods: The subjects of this study were 13 paramedic students at college D located in B city. Frequency percentages, mean standard deviations, and paired sample t-tests were conducted using the SPSS/WIN 23.0 program. Results: This study revealed that chest compression depths (t=-2.151, p=.053) and compression rates (t=-2.714, p=.019) were higher in mask-wearers, while muscle activity and subjective fatigue (t=2.382, p=.035) of the erector spinae (t=7.082, p=.001), rectus abdominis (t=4.776, p=.001), and pectoralis major muscles (t=3.193, p=.008) were lower in mask-wearers. Conclusion: The results of this study can be used as a basis to increase the resuscitation rates of cardiac arrest patients and provision of high-quality chest compressors to rescuers when infectious diseases recur in the future.

• 대한두개안면성형외과학회지
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• 제24권2호
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• pp.73-77
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• 2023

Hidradenitis suppurativa (HS) is a chronic inflammatory condition that is difficult to diagnose, with a period of 10.0±9.6 years from symptom onset to diagnosis. A 32-year-old Asian man presented with bilateral postauricular abscesses that first appeared 5 years previously. Despite several incisions and drainage, the symptoms only temporarily improved and continued to recur. On physical examination, chronic scars and sinus tracts were observed around the lesion. Postauricular HS was diagnosed, and surgical treatment was performed. We performed a wide excision and reconstructed the defect using a posterior auricular artery perforator-based keystone flap. Histological examination confirmed the diagnosis of HS. The reconstruction was successful, and there was no recurrence for 2 years after surgery. HS is difficult to diagnose without specific attention. Although the postauricular region is not a typical site of HS, it can occur in this area. Therefore, if a patient presents with recurrent abscesses in the postauricular region, HS should be considered. Additionally, if HS is diagnosed in the postauricular region, wide excision with reconstruction using a posterior auricular artery perforator-based keystone flap can lead to a favorable outcome.