• Clinics in Shoulder and Elbow
• /
• 제23권2호
• /
• pp.109-117
• /
• 2020

Repair of the rotator cuff tear is a joint-tightening procedure that can worsen joint stiffness. This paradoxical phenomenon complicates treatment of rotator cuff tear with joint stiffness. As a result, there is controversy about how and when to treat joint stiffness. As many treatments have been published, this review discusses the latest findings on treatment of rotator cuff tear with joint stiffness.

• 로봇학회논문지
• /
• 제14권4호
• /
• pp.237-244
• /
• 2019

This paper suggests novel types of joint mechanisms composed of elastic strings and rigid bodies. All of the human hinge joints have the articular capsule and a pair of collateral ligaments. These fibrous tissues make the joint compliant and stable. The proposed mechanism closely imitates the human hinge joint structure by using the concept of tensegrity. The resultant mechanism has several characteristics shown commonly from both the tensegrity structure and the human joint such as compliance, stability, lightweight, and non-contact between rigid bodies. In addition, the role and feature of the human hinge joints vary according to the origins of a pair of collateral ligaments. Likewise, the locations of two strings corresponding to a pair of collateral ligaments produce different function and motion of the proposed mechanism. It would be one of the advantages obtained from the proposed mechanism. How to make a joint mechanism with different features is also suggested in this paper.

• 전자공학회논문지B
• /
• 제32B권11호
• /
• pp.1445-1454
• /
• 1995

In this study, we have developed a prototype of the automatic defects detection system for capsule inspection using the computer vision techniques. The subjects for inspection are empty hard capsules of various sizes which are made of gelatine. To inspect both sides of a capsule, 2-stage recognition is performed. Features we have used are various lengths of a capsule, area, linearity, symmetricity, head curvature and so on. Decision making is performed based on average value which is computed from 20 good capsules in training and permission bounds in factories. Most of time-consuming process for feature extraction is computed by hardware to meet the inspection speed of more than 20 capsules/sec. The main logic for control and arithmetic computation is implemented using EPLD for the sake of easy change of design and reduction in time for developement. As a result of experiment, defects on size or contour of binary images are detected over 95%. Because of dead zone in imaging system, detection ratio of defects on surface, such as bad joint, chip, speck, etc, is lower than the former case. In this case, detection ratio is 50-85%. Defects such as collet pinch and mashed cap/body seldom appear in binary image, and detection ratio is very low. So we have to process the gray-level image directly in partial region.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제30권3호
• /
• pp.292-295
• /
• 2008

활액낭은 측두하악관절에 매우 드물게 나타나는 질환으로 본 증례는 개구제한을 주소로 내원하여 측두하악관절장애로 의심하고 자기공명 영상검사를 시행하였다. T2강조영상에서 좌측 측두하악관절강내에 다량의 활액이 관찰되었으나 전형적인 활액막 연골종증과 달리 상하관절강내의 활액이 격벽에 의해 분리되어 있었으며 수술시 낭성 병변이 관찰되었다. 조직학적으로 낭주위가 활액세포로 이장되어 있는 진성낭이었으며 낭벽내에 신생혈관 및 염증세포의 침윤이 관찰되어 염증성 활액낭으로 최종 진단하였다. 이 증례는 특징적인 자기공명영상소견을 나타내었지만 타 질환과 감별에 많은 어려움이 있었다. 치료는 병소의 적출을 시행하였으며 추적관찰기간 동안 재발은 보이지 않았다.

• 대한견주관절학회:학술대회논문집
• /
• 대한견주관절학회 2007년도 제15차 대한견주관절학회 및 제3차 Mayo Asia Elbow Club 합동 학술대회
• /
• pp.59-61
• /
• 2007

• 대한견주관절학회:학술대회논문집
• /
• 대한견주관절학회 2008년도 제16차 학술대회
• /
• pp.7-7
• /
• 2008

• Archives of Plastic Surgery
• /
• 제43권2호
• /
• pp.216-218
• /
• 2016

• 한국산학기술학회논문지
• /
• 제21권7호
• /
• pp.38-45
• /
• 2020

아진공 튜브 안을 부상한 상태로 주행하는 캡슐트레인은 공기저항력 및 마찰력을 획기적으로 줄임으로써 초고속 주행이 가능하다. 캡슐트레인에서 부상방식으로 사용되는 초전도 유도 반발식 부상은 부상 공극이 커서 인프라 건설비용이 저렴하고 별도의 부상제어가 필요 없는 장점이 있지만, 부상·안내 공극의 변화가 크고 부상 및 안내력에 댐핑 특성이 작아 주행 안정성 및 승차감을 악화시킬 수 있다. 본 연구에서는 초전도 유도 반발식 부상방식에 기반한 캡슐트레인의 동특성 해석 모델을 구축하고 이를 활용하여 캡슐트레인의 주행 특성을 분석하였다. 먼저 초전도 유도 반발식 부상에 있어서 동특성에 중요한 영향을 미치고 속도 및 공극 변화에 따라 비선형적인 특성을 보이는 부상 및 안내 강성을 도출하였고, 이러한 강성이 반영된 캡슐트레인의 3D 동특성 해석 모델을 구축하였다. 구축된 모델을 이용하여 캡슐트레인의 속도별 주행 특성이 승차감에 미치는 영향과 곡선 주행, 튜브 처짐 및 튜브 연결부 단차 등과 같은 주행 환경이 차량의 동특성 및 주행 안정성에 미치는 영향을 검토하였다.

• Clinics in Shoulder and Elbow
• /
• 제2권2호
• /
• pp.199-203
• /
• 1999

It is well known that the essential pathology in traumatic anterior dislocation of the shoulder is the avulsion of the glenohumeral ligament complex from the glenoid rim, However, there were some reports that the avulsion can occur from the humeral attachment site. We have experienced a 42-year-old man who had complained of persistent shoul­der pain after traffic accident and showed the instability on physical examination. The MR arthrogram and arthro­scopic surgery revealed the avulsion of glenohumeral ligament from the humeral attachment site. We repaired the lesion using the suture anchor through the anterior axillary approach and had a good result after 1 year.

• 한국임상수의학회지
• /
• 제20권2호
• /
• pp.229-232
• /
• 2003

Ultrasonographic examination of the stifle joint four clinically and radiographically normal adult dogs was performed before and after inducing the cranial cruciate ligament (CrCL) rupture of the bilateral stifle surgically. At Pre- or post-surgery, the hyperechoic patella ligament and the echogenic infrapatella fat interfered the visualization of the CrCL by the plain scanning method. However when the stifle joint was imaged by the scanning method injecting normal saline within the joint capsule, the hyperechogenic ligament was visualized by the separation of the infrapatella fat and the CrCL and the contrast effect of anechoic saline. When the stifle joint was imaged by the real time scanning method after the induction of the surgical rupture, fluttering of the ligament and anechoic area between the bone and the CrCL was identified due to the lack of tonicity and continuity of the ligament. Enlargement of the ligament because of its increased diameter as well as fluttering of the CrCL and the increased joint space's thickness was visualized. Consequently, confirming fluttering of the CrCL, increased ligament diameter and anechoic region between the CrCL and the bone, ultrasonographic examination is a valuable diagnostic tool as well as cranial drawer test and radiographic examination.