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치성각화낭과 법랑모세포종의 임상 및 방사선학적 감별진단
정호걸,이장렬,김기덕,박창서 大韓口腔顎顔面 放射線學會 2000 Imaging Science in Dentistry Vol.30 No.4
Purpose : To clarify the clinical and radiologic parameters that can be used to differentiate odontogenic keratocyst and ameloblastoma Materials and Methods : The records of 46 patients of ameloblastoma and 48 patients of odontogenic keratocyst at the Yonsei University Dental Hospital during the period of 1979 to 1995 were retrospectively reviewed. As a possible means for differentiating between the odontogenic keratocyst and ameloblastoma, the clinical parameters and the radiologic parameters were evaluated. Results : In the clinical parameters, there was no significant difference in age, sex, and sign and symptoms (p 〉 0.05). In the radiologic parameters, there was significant difference in site, shape of the lesion, and external root resorption of adjacent teeth (p 〈 0.05). Conclusion : The site, shape of the lesion, and external root resorption of adjacent teeth can be the parameters to differentiate odontogenic keratocyst and ameloblastoma, but a definite differentiation of these two lesions needs a more specialized imaging modality. (Korean J Oral Maxillofac Radiol 2000;30:249-254)
과도한 운동으로 발생한 횡문근융해증에 의한 급성신부전증 1예
문철호,류보열,모성환,김태종,기장도,박용관,김용환,정종훈 조선대학교 1995 The Medical Journal of Chosun University Vol.20 No.1
Rhabdomyolysis may be defined as a clinical and laboratory syndrome which releases muscle cell contents into the plasma, such as creatine phosphokinase, due to skeletal muscle injuries. It can be the result of many diverse causes including muscle disease, ischemia, genetic disorder, metabolic disorder, infectious disease, drugs, comatose state, trauma or vigorous exercise that can lead to acute renal failure as a complication. Since first reported in 1941, rhabdomyolysis-induced acute renal failure has been documented many times, and the major causes of this disease are carbon monoxide poisoning, snake bites, and etc in Korea Reports of acute renal failure after exercise-related rhabdomyolysis with myoglobinemia are rare. We report a case of acute renal failure caused by exercise-related rhabdomyolysis in a 20 year old man.
척추경 나사못을 이용한 척추 유합술에서 고정범위에 따른 인접 추간판의 압축 거동 분석
안면환,안종철,이수호,정일섭,이춘열,이장우 영남대학교 의과대학 2003 Yeungnam University Journal of Medicine Vol.20 No.2
요추부 척추에 기구를 시술한 유한요소 복합체 모델을 이용하여 제 4-5 요추간판에 대한 해석을 수행한 결과, 근육의 작용을 케이블과 케이블 가이드로써 단순화 모사한 follower 하중에서 수직하중인 경우보다 높은 압축력을 나타내어 더욱 안정함을 보였고 불안정성의 원인이 되는 전단력과 굽힘모멘트의 발생은 미미하였다. 장분절 고정에 의한 인접 분절에 전단력이 증가됨을 실험적으로 보였는데, 이는 장분절 고정이 퇴행성 변화 촉진에 기여할 것으로 추정된다. Background: Confirm the stability of intervertebral disc sustaining each fused lumbar spine cases, comparing vertical compression, A-P shear force and rotational moment on intervertebral disc of instrumented lumbar spine with simple vertical compression load and follower load using finite element analysis. Materials and Methods: We analyze the stability of intervertebral disc L4-5 supporting fused lumbar spine segments. After performing finite element modelling about L1-L5 lumbar vertebral column and L1-L4 each fusion level pedicle screw system for fused lumbar spine fine element model. Intervertebral discs with complex structure and mechanical properties was modeled using spring element that compensate stiffness and tube-to-tube contact element was employed to give follower load. Performing geometrical non-linear analysis. Results: The differences of intervertebral disc L4-5 behavior under the follower compression load in comparision with vertical compression load are as follows. Conclusion: As a result of finite element interpretation of interpretation of instrumented lumbar spine, the stability of L4-5 sustaining fused lumbar segment, the long level fused lumbar spine observed hing stability under follower load. This research method can be the basis tool of effects prediction for instrumentation, a invention of a more precious finite element interpretation model which consider the role of muscle around the spine is loaded.
Laser assisted Ridge Split Technique and Ridge Expansion Technique
Ho-yeol Jang,Jang - yeol Lee,Young-kyun Chung,Hwa-su Koong,Hyoun-chull Kim,Il-hae Park,Sang-chull Lee 대한치과이식임플란트학회 2006 The Korean Academy of Implant Dentistry Vol.25 No.2
수평적으로 퇴축이 심화된 치조골이나 이상적인 보철물의 형태와 위치를 위해 implant 식립 각도와 위치 조정이 필요한 경우 치조골의 수평적 골 회복이 필요하다. 그 중 Ridge split technique과 Ridge expansion technique은 치조골을 협설 즉으로 확대하여 implant 식립이 가능한 공간을 만들 뿐 아니라 그 공간에 신생골의 재생을 기대할 수 있으며 골 이식재의 필요성도 감소시킨다. 최근 치과 술식에 활발히 사용되고 있는 Erbium 계통의 Laser는 Ridge split technique과 Ridge expansion technique에 활용될 수 있다. 잔존 치조골에 Laser를 조사하여 피질골을 천공시키고 해면골에 chisel이나 osteotom 이 들어갈 수 있는 공간을 확보하는 것이다. 이때 기존의 pilot d rill, bur나 piezoelectric device를 이용하는 방법보다 적은 삭제량으로 bone cutting이 가능하고 열손상이 적으며 치조골에 가해지는 외상을 줄일 수 있는 장점이 있다.