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      • KCI등재

        해면골 밀도변화에 따른 임플랜트 주위골의 3 차원 유한요소법적 응력분석

        최희연,황영필,계기성 朝鮮大學校 口腔生物學硏究所 1997 Oral Biology Research (Oral Biol Res) Vol.21 No.1

        The purpose of this study was to get the information about the evaluation and prognosis of the surrounding bone of the implant analyzing the stress and displacement pattern occurred at the vertical and inclined load. Three-dimensional finite element model was constructed in the mandible with the placement of one implant fixture. The composition of the finite element model was S type, that is, S- 100(sponge bone 100%), S-75(sponge bone 75%), S-50(sponge bone 50%), S-25(sponge bone 25%), and C type, that is, C-100(cortical bone 1.5㎜ + sponge bone 100%), C-75(cortical bone 1.5㎜ + sponge bone 75%). C-50(cortical bone 1.5㎜ + sponge bone 50%), C-25(cortical bone 1.5㎜ + sponge bone 25%). After the three-demensional finite element model was complected. The vertical load pralied and the inclined load of 30°to the long axis of the implant were applied with the 200N to the superstructure of implant, and then the stress and the displacement were analyzed by the soft ware ABAQUS and I-DEAS. The following results were obtained: 1. In the case of S type composed of the sponge bone, the stress value and stress pattern of the surrounding bone of the implant occurred similarly irrespective of the bone density change, and the less the bone density was, the greater the displacement was. 2. In the case of C-50 type composed of the cortical bone and sponge bone, the stress occurred predominantly at the cortical bone of the cervical area of the implant at the vertical and inclined load. 3. In the case of C-25 type composed of the cortical one and sponge bone, the stress occurred predominantly at the cortical bone of the cervical area of the implant and at the outer layer of the mandible at the vertical and inclined load. In conclusion, the sponge bone density acted the role of the important variable about the treatment planning and the prognosis of the implant, and the special measure for increasing the bone density must be considered when the sponge bone density is under the normal level clinically.

      • KCI등재

        Social Behavioral Problems and the Health-Related Quality of Life in Children and Adolescents with Epilepsy

        최희연,김송이,이향운,김의정 대한신경정신의학회 2016 PSYCHIATRY INVESTIGATION Vol.13 No.5

        ObjectiveaaThe purpose of this study was to investigate the impact of specific behavioral problems on the health-related quality of life (HRQOL) in children and adolescents with epilepsy. MethodsaaChildren and adolescents with epilepsy (n=92; age range=6–17 years) and their mothers completed questionnaires about behavioral problems, HRQOL, socio-demographics, and epilepsy-related variables. To determine significant predictor variables of the HRQOL, the stepwise regression analyses and partial correlations were performed to adjust for other behavioral problems and covariates. ResultsaaThe analyses revealed that an increase in social behavioral problems and delinquent behavior was associated with a decrease in the HRQOL. Lower levels of maternal education and the number of antiepileptic drugs were also associated with a decline in the HRQOL; the HRQOL and social behavioral problems remained significantly correlated after adjusting for maternal education level, number of antiepileptic drugs, and non-social behavioral problems. ConclusionaaParents and practitioners should provide intervention if behavioral problems, particularly social behavioral problems, are observed in children or adolescents with epilepsy.

      • 불면증 치료의 최신지견

        최희연,임원정 이화여자대학교 의과학연구소 2013 EMJ (Ewha medical journal) Vol.36 No.2

        Insomnia is one of the most common sleep disorders, which is leading to significant clinical distress and impairment of daytime functioning and decreasing quality of life. This article reviews the current clinical treatment options of insomnia. Non-pharmacological treatment including stimulus control, sleep restriction, cognitive therapy, relaxation training, and education of sleep hygiene should be considered first for treatment of insomnia. Psychological and behavioral interventions tend to have longer-lasting treatment benefits, while drugs show immediate improvement of sleep disturbance. In pharmacotherapy, benzodiazepine receptor agonist, melatonin receptor antagonist, and ‘off-label’ drugs to treat insomnia are reviewed.

      • KCI등재

        Clinical Features and Prognosis of Corneal Ulcers in Dogs with Chronic Kidney Disease

        최희연,김세은,김태현,장재영,황선영,서강문 한국임상수의학회 2021 한국임상수의학회지 Vol.38 No.3

        This study was designed to investigate the characteristics of corneal ulcers in dogs with chronic kidney disease (CKD). Medical records of dogs that had been diagnosed with corneal ulcers and chronic kidney disease at Haemaru Referral Animal Hospital between April 1, 2011 and March 31, 2016 were investigated. A control group was randomly selected during the same time period. This group included patients with corneal ulcers but no evidence of systemic disease. The mean healing time of superficial corneal ulcers in the CKD group was 21.0 ± 15.0 days. This was a significantly longer healing time than was observed in the control group (11.0 ± 6.6 days, p = 0.019). The incidence rates of uveitis and keratoconjunctivitis sicca in the CKD group were significantly higher than in the control group (p = 0.000 and p = 0.026, respectively). Additionally, non-healing ulcers had significantly elevated white blood cell counts, while those with healing ulcers had WBC counts within the normal range in CKD group (p = 0.000). This study revealed that corneal ulcers in CKD patients would be delayed epithelial healing process and accompanied by ocular disease which affected to corneal healing compared to non- CKD patients.

      • KCI등재

        실내골프운동이 중년비만 여성의 심박변이도에 미치는 영향

        최희연,정일미 한국골프학회 2018 골프연구 Vol.12 No.4

        [Purpose] The purpose of this study was to verify the effect of the Golf Exercise obese middle-aged women, and want to be helpful to the autonomic nervous system balance. [Method] The indoor golf movement was performed with a 7-iron for 10 weeks with a half and full swing aiming for the exact impact. The test was used to measure the heart rate variability. Statistical programs were used to measure each items descriptive statistics and two - way ANOVA. [Result] Total power (F=6.036, P=.022), Standard Deviation of n-n Interval (F=4.823, P=.039) and Root Mean Square of Standard Deviation (F=5.055, P=.035) there was a statistically significant difference in interactions between periods. [Conclusion] The results of this study show that golf exercise has a positive effect on the management of autonomic nervous system in middle-aged obese women. Therefore is considered that middle-aged obese women will participate in golf exercise and reference data in actual field. [목적] 본 연구의 목적은 중년비만여성들의 실내골프운동 참여가 자율신경계 균형에 미치는 효과를 검증하는데있다. [방법] 실내골프운동을 7번 아이언으로 10주간 하프 및 풀 스윙을 거쳐 정확한 타점을 목표로 수행하였다. 효과 검증은 심박변이도를 측정하였고 통계프로그램을 사용하여 각 항목별 측정치를 기술통계량과 이원변량분산분석을 실시하였다. [결과] 전신 활력(F=6.036, P=.022), 육체적 복합도와 피로도를 반영한 시간영역의 전체 R-R 간격의 표준편차(F=4.823, P=.039), 심장의 안전도를 반영한 연속적인 R-R 간격의 평균제곱 차이의 제곱근(F=5.055, P=.035)에서 집단 및 시기 간의 상호작용에서 통계적으로 유의한 차이가 나타났다. [결론] 본 연구 결과골프운동은 중년비만여성들의 전신 활력과 육체적 복합도 및 피로도 그리고 심장의 안전도를 반영한 지표들의통계적으로 유의한 증가로 자율신경계 균형에 긍정적인 변화를 나타냈다. 따라서 실제 현장에서 중년비만여성들의 골프운동이 무너진 자율신경계의 균형 및 개선에 도움이 될 것으로 사료된다.

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