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척추성형술에서 PMMA 주입에 의한 망상골의 압축강도 변화 연구
문희옥,이문규,김정규,이태수,최귀원 대한의용생체공학회 2003 의공학회지 Vol.24 No.4
골다공증에 의한 척추체의 압박골절은 뼈의 파단성 질병중에서 가장 흔하게 나타나는 증상이다 최근에 척추압박골절에 대한 의학적 치료방법으로 각광받고 있는 척추성형술은 골강화제를 주입함으로써 척추체를 강화하고 변형을 보정하며. 환자의 고통을 줄여준다. 그러나 종전 연구에서는 골강화제가 주입된 후 척추체의 기계적 특성 강화에 대한 연구가 전무했으므로, 본 연구에서는 PMMA의 물성을 바탕으로 돼지와 사체로부터 시편을 얻어 겉보기 밀도에 대한 순수 망상골과 PMMA가 주입된 망상골의 영률을 측정하였다. 겉보기밀도에 따른 영률은 순수망상골의 경우 멱급수의 형태를 가지며. PMMA가 주입된 망상골의 경우 선형적인 형태를 가졌다. The compressed fracture of spine caused by osteoporosis is one of the most frequent diseases in bone fracture. Recently the vertebroplasty has drawn much attention as a medical treatment for the compressed fracture of spine, which strengthens the vertebral body and corrects deformity, and relieves pain in patients by injecting bone cement. But because there were no research about strengthening of mechanical properties of verbral body in bone cement injection, in this study, based on the properties of PMMA, we had measured the Young's modulus for different apparent densities of intact trabecular bone and PMMA injected one from a porcine and a cadaver. Young's modulus to apparent density had a form of a power series in intact trabecular bone and had a linear relation in PMMA injected bone.
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함웅,김묘은,이흥표,양익홍,문희옥 大韓神經精神醫學會 1997 신경정신의학 Vol.36 No.2
In order to product and develop questionnaire which can assess the schizotypal personality by model of criteria in DSM-Ⅲ-R, it was presented following question in this study. First, for the validation and manufacture of scale and sub-subscale that assess overall feature, nine characteristics of the schizotypal personality disorder, this study was concerned with validity, reliability and factor-analysis results of schizotypal personality questionnaire. Second, we would by present how schizotypal personality disorder trend is connected with trait-anxiety, hopelessness and self-concept. Also the difference is compared with. Finally, 396(male 216 Ss/53,8%, female 180 Ss/45.5%) college students with mean age 21.2 years were sampled. Raine(1991)'s schizotypal personality questionnaire(SPQ) which assess nine characterisitics of schizotypal personality disorder in DSM-Ⅲ-R was translated and used. In this results, Raine's schizotypal personality questionnaire was appeared to have high internal validity, split-half reliability and test-retest reliability. Also, 6 factors were affirmed by empirical confirmation through factor-analysis. 6 factors have been very reliable internal validity that ranges from .78 to .83. In these 6 factors, idea of reference, odd or eccentric behavior and odd speech were corresponded to the category model after DSM-Ⅲ-R in Raine's scale. 'Cognitive, perceptive' dimension was centered of factor 1, 'Emotive, affective' dimension was centered of factor 2, social anxiety and constricted affect were constituted to 2nd factor. No close friends, schizoid trend and suspiciousness of schizotypal characteristics were constituted to 3rd factor by 'interpersonal relationship' dimension. These empirical outcomes which confirmed through factor-analysis were very valid and connected much to Raine's scale which assessed schizotypal personality disorder, thus possibility of development and manufacture of schizotypal personality disorder scale through item revision was lighten. In 2nd study the higher schizotypal personality disorder trend, trait-anxiety and hoplessness were higher. But on the contrary, self-concept was lower. The group of high score in schizotypal personality questionnaire had more trait-anxiety and hopelessness than the group of low score in schizotypal personality questionnaire. Contrastly, positive self-concept was high in the group of low score. Also the most predictable variable to the trait-anxiety was factor 2, predictable power R²of factor 2 was 29.1%. To the hopelessness, factor 2 was the most powerful predictable variable. Predictable power of factor 2 was 11.2%, also. In self-concept, factor 2 explained 20.8% of self-concept, thus it was presented that factor 2 had the most powerful explanatory quantity. In these consequences, the factors which have meaningful connection to the trait-anxiety, hopelessness and low self-concept within 6 factors were really factor 2, 3, 1. Among these factors, "Emotive' feature of factor 2 including social anxiety and constricted affect have the most effect on trait-anxiety, hopelessness and self-concept. And next to factor 2, the isolated interpersonal relation which include no close friends and schizoid trend was some influential variable. Also peculiar, unusual preceptual experience, eccentric belief and magical thinking had some effect though small. The college students who had strong schizotypal personality trend had more social anxiety and more constricted emotional empathic ability, less self-expression, less social skill than common college sudents. These elements threaten, interrupt and retard identity establishment and intimacy-seeking which are important developmental tasks within this period. These experiences is accepted to ego-dystonic to schizotypal college students who have some or moderate reality testing, adaptive ability. Moreover, These peoples would feel locus of contol externally, not internally and would have more control-failure experiences. All these elemets elevate anxiety level, give rise to low self-concept and low expectation to the future. These outcomes all confirmed questions which presented in this study.
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