• PNF and Movement
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• v.11 no.2
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• pp.87-93
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• 2013

Purpose : The purpose of this study was to investigate the effects of closed chain breathing exercise on thorax circumference increase and ROM of shoulder rotation for cervical vertebral cord injury patient's. Methods : 12 cervical vertebral cord injury patients volunteer to participate in this study. closed chain breathing exercise group of 4 subjects performed exercise three time a week. The deep breathing exercise group and general exercise group of 4 subjects performed exercise three time a week. We analyaed the descriptive statistics and $3{\times}2$ repeated measures ANOVA by SPSS 12.0 for window. Results : In comparison of rotation of shoulder ROM between pre and post value, the increase of rotation ROM of shoulder was significant in the closed chain breathing exercise group(p<.05). Conclusion : The closed chain breathing exercise helped to increased rotation ROM of shoulder.

• Journal of the Korean Orthopaedic Association
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• v.56 no.1
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• pp.51-60
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• 2021

Purpose: Radiocarpal dislocation (RCD), which is caused by high-energy trauma, often involves radial styloid fractures and short radiolunate ligament (SRLL) injuries. Although SRLL injuries may occur as a simple rupture at the attachment site of radius, it may occur with a relatively large avulsed-fragment in the volar rim of the lunate facet of the radius. This study aimed to differentiate the injury type of SRLL and assess the differences in the treatment results depending on the treatment methods that have been applied in RCD with radial styloid fractures. Materials and Methods: Eighteen patients managed surgically with RCD were enrolled in this study. The patients were classified as Group 1 and Group 2 by using the Dumontier method. In this study, Group 2 was subdivided into 2A (purely ligamentous or small avulsion fracture of the volar rim of lunate facet) and 2B (large avulsed-fragment enough to internal fixation) according to the injury type of SRLL. Groups 2A and 2B were treated with direct repair and screw fixation, respectively. Pain, range of motion of the wrist joint, grip strength, and complications on final radiographs were examined. The outcomes were evaluated using patient-rated wrist evaluation (PRWE), and modified Mayo wrist score (MMWS). Results: All patients were Group 2 (six and twelve patients in 2A and 2B, respectively). The mean flexion to extension arch recovered 79%,and the mean grip strength was 72.9% of the uninjured side. Group 2A showed better recovery in extension, flexion and pronation than Group 2B, but there was no difference in radial deviation, ulnar deviation, supination, grip strength and pain. No differences in the PRWE and MMWS were observed between two groups. Complications included traumatic arthritis in seven patients and residual instability in five patients. Conclusion: When the SRLL was injured, the involvement of a large avulsion fracture on the anterior plane of the radiolunate did not affect the test results. On the other hand, it should be observed cautiously because avulsion fractures tend to disturb the joint's reduction through rotation or displacement. In addition, anatomical reduction and sturdy internal fixation are important for restoring the function of the SRLL.

• Journal of Advanced Marine Engineering and Technology
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• v.35 no.6
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• pp.786-795
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• 2011

This paper described the characteristic of vibration in wind turbine system including gearbox housing, gear drive, blade, generator. Especially, in planetary gear set, planet gears are supported by flexible pin. So, in planet gear, to consider not only torsional movement but also lateral movement. And include housing movement, because wind turbine system is supported by mount. To find out the characteristic of vibration, take the excitation source and study campbell diagram in operating range. Results of campbell diagram, resonances are occurred at 81.2HZ, 104.7Hz by 2nd tooth passing frequency. And resonance are also occurred at 264.5HZ, 377Hz, 424.6Hz by 3th tooth passing frequency. From the result, take vibration reduced measures.

• Clinics in Shoulder and Elbow
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• v.14 no.2
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• pp.242-247
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• 2011

Purpose: We present an atypical case of calcific tendinitis of the shoulder with intraosseous loculation. Materials and Methods: A 59 year-old female complained of acute exacerbation of chronic left shoulder pain and restricted range of motion. Simple radiographs showed a subacromial calcific deposit and magnetic resonance imaging revealed cortical erosion with intraosseous extension of calcific material mimicking infection or tumor. She was managed with arthroscopic excision of the calcific deposit, curettage of the intraosseous lesion and subsequent rotator cuff repair with a suture anchor. Results: Her acute pain promptly subsided. Her rehabilitation was uneventful and she gained full range of motion. Radiographs five months after the operation showed no recurrence of calcific material. Conclusion: Calcific tendinitis of the shoulder can present with a variety of images involving the adjacent bone. The correct recognition of this disorder may avoid unnecessary investigation and treatment.

• Clinics in Shoulder and Elbow
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• v.10 no.1
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• pp.146-149
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• 2007

Congenital undescended scapula is congenital structural abnormality which affects only one side usually. Scapula located higher than the usual and rotating deformity that inferior angle to medial side, superior angle to lateral side is common. This report presents one case of the surgical therapy of a sprengel deformity patient who passed an optimal operation period with age $3{\sim}7$years old, and includes brief review of the literature. 7 years old boy whose chief complaint was the limitation of left scapular-thoracic movement and he had an omovertebral bone bridge and periscapular muscle atrophy. There was improvement of motion ranges and cosmetic problems after surgical treatment.

• The Journal of the Korean bone and joint tumor society
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• v.7 no.2
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• pp.51-58
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• 2001

Purpose : In patients having malignant and aggressive bone tumors around knee joint requiring amputation, segmental resection and rotationplasty were performed and the clinical results were analyzed. Materials and Methods : Twenty-six patients underwent segmental resection and rotationplasty between February 1988 and June 1994, because limb salvage with tumor prosthesis after removal of tumor was impossible. The mean follow-up of malignant tumors was 57(6~120) months and the average age of patients was 21.4(5~37) years old. Out of 26 patients, there were 18 osteosarcoma(${\geq}$stage IIB), 2 synovial sarcoma, and 6 giant cell tumor. Results : Clinical results were evaluated by the Shriner's rating system. Four patients were excluded due to death or amputation and remaining 22 patients were included for assessment. Eighteen patients had excellent result, 3 good, and 1 fair. Range of motion of ankle joint was -11(dorsiflexion)~80(plantarflexion) degrees and daily walking activity with prosthesis was possible. Local recurrence developed in 2 patients and distant metastasis in 10. Early complications had 3 thrombosis and 1 sepsis, and late complications had 6 nonunion, 2 malrotation and 1 stiffness of ankle joint. Conclusion : Rotationplasty which is functionally excellent may serve as an effective partial limb salvage procedure, especially in patients less than 10 years old that lower extremity discrepancy or loosening tumor prosthesis due to enlargement of medullary cavity are anticipated or amputation is inevitable for wide resection margin.

• The Journal of the Acoustical Society of Korea
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• v.37 no.2
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• pp.99-109
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• 2018

The precision of the vibration-sensors, contact or non-contact types, is usually satisfactory for the practical measurement applications, but a sensor is confined to the measurement of a point or a direction. Although the precision and frequency span of the low-cost camera are inferior to these sensors, it has the merits in the cost and in the capability of simultaneous measurement of a large vibrating area. Furthermore, a camera can measure multi-degrees-of-freedom of a vibrating object simultaneously. In this study, the calibration method and the dynamic characteristics of the low-cost machine vision camera as a sensor are studied with a demonstrating example of the two-dimensional vibration of a cantilever beam. The planar image of the camera shot reveals two rectilinear and one rotational motion. The rectilinear vibration motion of a single point is first measured using a camera and the camera is experimentally calibrated by calculating error referencing the LDV (Laser Doppler Vibrometer) measurement. Then, by measuring the motion of multiple points at once, the rotational vibration motion and the whole vibration motion of the cantilever beam are measured. The whole vibration motion of the cantilever beam is analyzed both in time and frequency domain.

• Clinics in Shoulder and Elbow
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• v.13 no.1
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• pp.47-52
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• 2010

Purpose: To evaluate shoulder stability, clinical, and functional results more than 6 months after utilizing the 'Remplissage' technique, consisting of an arthroscopic posterior capsulodesis and infraspinatus tenodesis, to fill Hill-Sachs lesions. Materials and Methods: Seven patients were followed-up more than 6 months after the 'Remplissage' procedures performed in our hospital from August 2008 to August 2009. The mean age of the patients was 28.6 years and the mean follow-up time was 10 months. Evaluations included ROM, ASES score, KSSI score, ROWE score, and postoperative MRI. Results: In a functional evaluation of the patients with an average postoperative time of 10 months, the ASES score improved from 51.4 preoperatively to 76.8 postoperatively, the KSSI score improved from 46.5 preoperatively to 76 postoperatively, and the ROWE score improved from 43.5 preoperatively to 76.3 postoperatively. After an average postoperative time of 10 months, the range of motion was nearly normal (>170 degrees in further flexion, and >45 degrees in external rotation). Conclusion: In recurrent shoulder instabilities with large Hill-Sachs lesions, the 'Remplissage' technique resulted in good outcomes in terms of shoulder stability, clinical, and functional results after postoperative times of more than 6 months.

• Clinics in Shoulder and Elbow
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• v.14 no.1
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• pp.53-58
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• 2011

Purpose: We evaluated the minimal 1 year follow-up results (shoulder stability and the clinical and functional results) for the Remplissage technique to fill a Hill-Sachs lesion. Materials and Methods: The subjects were 12 patients who could be followed up for more than 12 months after the "Remplissage" procedures in our hospital from December 2008 to November 2009. Their mean age was 27.9 years old and the mean follow-up was 19 months. The evaluations included the ROM, the ASES score, the KSSI score, the ROWE score and postoperative MRI. Results: On the postoperative functional evaluation after an average of 16 months, the ASES score improved from 50.8 preoperatively to 78.3 postoperatively, the KSSI score improved form 44.5 preoperatively to 81.0 postoperatively and the ROWE score improved from 40.2 preoperatively to 84.3 postoperatively. After an average 14 months for all the cases, the range of movement was nearly in the normal range, which is 178.6${\pm}$18.6 (165~180) degrees for forward flexion and 49.3${\pm}$10 (43~60) degrees for external rotation. Conclusion: For recurrent shoulder instability with a large Hill-Sachs lesion, the Remplissage technique has a good outcome after more than 1 year follow-up in terms of the shoulder stability and the clinical and functional results.

• The Journal of Korean Academy of Prosthodontics
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• v.61 no.4
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• pp.257-267
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• 2023

Purpose. The purpose of the study was to fabricate a prototype robotic simulator for dental education, to test whether it could simulate mandibular movements, and to assess the possibility of the stimulator responding to stimuli during dental practice. Materials and methods. A virtual simulator model was developed based on segmentation of the hard tissues using cone-beam computed tomography (CBCT) data. The simulator frame was 3D printed using polylactic acid (PLA) material, and dentiforms and silicone face skin were also inserted. Servo actuators were used to control the movements of the simulator, and the simulator's response to dental stimuli was created by pressure and water level sensors. A water level test was performed to determine the specific threshold of the water level sensor. The mandibular movements and mandibular range of motion of the simulator were tested through computer simulation and the actual model. Results. The prototype robotic simulator consisted of an operational unit, an upper body with an electric device, a head with a temporomandibular joint (TMJ) and dentiforms. The TMJ of the simulator was capable of driving two degrees of freedom, implementing rotational and translational movements. In the water level test, the specific threshold of the water level sensor was 10.35 ml. The mandibular range of motion of the simulator was 50 mm in both computer simulation and the actual model. Conclusion. Although further advancements are still required to improve its efficiency and stability, the upper-body prototype simulator has the potential to be useful in dental practice education.