• The Journal of Korean Academy of Prosthodontics
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• v.44 no.2
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• pp.197-206
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• 2006

Statement of problem: One of common problems associated with single teeth dental implant prosthetic is the loosening of screws that retain the implants. Purpose: The maintenance of screw joint stability is considered a function of the preload achieved in the screw when the suggested initial tightening torque is applied. The purpose of this study was to investigate acquired preload after initial clamping torque for estimating screw joint stability. Material and methods: A comparative study on the effect of initial clamping of two types of implant systems with different connections was conducted Three dimensional non-linear finite element analysis is adopted to compare the characteristics of screw preloads and stress distributions between two different types of implant systems composed with abutment, screw, and fixture under the same loading and boundary conditions. Results: 1. When the initial clamping torque of 32Ncm was applied to the implant systems, all types of implants generated the maximum effective stress at the first helix region of screw. 2. Morse taper connection types of implants generate lower stress distributions compared to those by butt joint connection types or implants due to large contact surface between abutment and fixture. 3. The internal types of implant systems with friction grip type implant systems have higher resistance to screw loosening than that of the external types of implant systems since the internal types of implant systems generated larger preload than that generated by the external types for the same tightening moments.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.11 no.2
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• pp.186-194
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• 2004

Purpose: The purpose of this study was to describe the subjective health status of joints, flexibility of joints, muscle strength and state of Joint exercise in elderly people living in the community. Method: The participants were 74 elderly people in a health program of the Gerontological Health Research Center at G University. The data were collected from March to July, 2003. The instrument for the study included items on general characteristics (5 items), subjective health status of joints (10 items), flexibility of Joints and strength of muscle (8 items), and state of joint exercise (7 items). Results: The score for subjective health status of joints was 3.70 (range 1-5). Knee and waist joints were in the worst state. Neck extension and flexion were $17.38{\pm}1.80$ and $.60{\pm}1.08(cm)$ respectively. Trunk extension and flexion were $68.24{\pm}4.47$ and $58.00{\pm}4.91(cm)$ respectively. Flexibility of the Rt./Lt. shoulder joints was $14.63{\pm}12.51/18.82{\pm}13.80(cm)$. Muscle strength of the Rt./Lt. leg was $30.47{\pm}19.68/29.67{\pm}21.22$ (sec.). Shoulder joints were more flexible for men and people in their sixties compared to women and people in their seventies. Hand grip was stronger for men compared to women. The score for state of joint exercise was 2.83(range 1-4). The state of handgrip correlated with the state of joint exercise [r=.423 (Rt.)/r=.273(Lt.)]. Conclusion: To prevent falls and disorders in neuromuscular function, it is important to develop systemic joint exercise programs for elderly people.

• Korean Journal of Applied Biomechanics
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• v.15 no.3
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• pp.161-173
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• 2005

Recently among several tennis techniques forehand stroke has been greatly changed in the aspect of spin, grip and stance. The most fundamental factor among the three factors is the stance which consists of open, square and closed stance. The purpose of this study was to investigate the relations between the segments of the body, the three dimensional anatomical angle according to open stance patterns during forehand stroke in tennis. For the movement analysis three dimensional cinematographical method(APAS) was used and for the calculation of the kinematic variables a self developed program was used with the LabVlEW 6.1 graphical programming(Johnson, 1999) program. By using Eular's equations the three dimensional anatomical Cardan angles of the joint and racket head angle were defined 1. In three dimensional maximum linear velocity of racket head the X axis showed $11.41{\pm}5.27m/s$ at impact, not the Y axis(horizontal direction) and the z axis(vertical direction) maximum linear velocity of racket head did not show at impact but after impact this will resulted influence upon hitting ball It could be suggest that Y axis velocity of racket head influence on ball direction and z axis velocity influence on ball spin after impact. the stance distance between right foot and left foot was mean $74.2{\pm}11.2m$. 2. The three dimensional anatomical angular displacement of shoulder joint showed most important role in forehand stroke. and is followed by wrist joints, in addition the movement of elbow joints showed least to the stroke. The three dimensional anatomical angular displacement of racket increased flexion/abduction angle until the impact. after impact, The angular displacement of racket changed motion direction as extension/adduction. 3. The three dimensional anatomical angular displacement of trunk in flexion-extension showed extension all around the forehand stroke. The angular displacement of trunk in adduction-abduction showed abduction at the backswing top and adduction around impact. while there is no significant internal-external rotation 4. The three dimensional anatomical angular displacement of hip joint and knee joint increased extension angle after minimum of knee joint angle in the forehand stroke, The three dimensional anatomical angular displacement of ankle joint showed plantar flexion, internal rotation and eversion in forehand stroke. it could be suggest that the plantar pressure of open stance during forehand stroke would be distributed more largely to the fore foot. and lateral side.

• Journal of muscle and joint health
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• v.14 no.2
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• pp.127-136
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• 2007

Purpose: There has been a need to integrating the self-help program for arthritis with the TaiChi for arthritis patient. The purpose of this study was to develop and to examine the effect of the Self-help and Tai Chi for arthritis (SHTCA) program for arthritis. Method: This study was designed non equivalent control group pre-post test, quasi-experimental design. A total 40 participants were recruited in W-city, 29 participants(14-experimental group and 15-control group) completed post test. The experimental group participated in the SHTCA once a week for 8 weeks. SHTCA program was consisted of understanding of the arthritis, contracting of the promise, exercise for muscle strength and joint flexibility and 8 movements of Tai Chi exercise. Coloring plus program to cellular phone was used to encourage the exercise and participation by the KT-SHUT twice a week. Measures used to examine the effect of the SHTCA were EQ-5D standardized five dimensions(mobility, self-care, usual activities, pain & discomfort, and anxiety & depression), and health perception, joint flexibility, grasping power, and balance. Collected data was analyzed by SPSS WIN 14.0. Results: The experimental group had significantly increased the EQ-mobility(p=.033), health perception(p=.000), right shoulder flexibility(p=.007), and left shoulder flexibility(p=.002) compared to the control group. In addition, pain was decreased(p=.052) and right grip was increased(p=.052) after 8 weeks program in the experimental group. Conclusion: This SHTCA using coloring plus program was found partially effective and satisfactory. We recommended further research on the effect of this SHTCA effects.

• Archives of Plastic Surgery
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• v.42 no.5
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• pp.614-618
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• 2015

Background Hand strength deficit following digital replantation is usually attributed to the mechanical deficiency of the replanted digit. Zone 1 replantation, however, should not be associated with any mechanical deficit, as the joint and tendon are intact. We evaluate shortterm motor functions in patients who have undergone single-digit zone 1 replantation. Methods A single-institution retrospective review was performed for all patients who underwent zone 1 replantation. Hand and pinch strengths were evaluated using standard dynamometers. Each set of measurements was pooled according to follow-up periods (within 1 month, 1 to 2 months, 2 to 3 months, and after 3 months). The uninjured hand was used as reference for measurements. Results The review identified 53 patients who had undergone zone 1 replantation and presented for follow-up visits. Compared to the uninjured hand, dynamometer measurements revealed significantly less strength for the hand with replanted digit at one month. The relative mean grip, pulp, and key pinch strength were 31%, 46%, and 48% of the uninjured hand. These three strength measurements gradually increased, with relative strength measurements of 59%, 70%, and 78% for 4-month follow up. Conclusions Despite the lack of joint or tendon injury, strength of the injured hand was significantly lower than that of the uninjured hand during the 4 months following replantation. Improved rehabilitation strategies are needed to diminish the short-term negative impact that an isolated zone 1 replantation has on the overall hand strength.

• Journal of muscle and joint health
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• v.9 no.1
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• pp.28-39
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• 2002

Objective. The 12 forms of Sun-style Tai Chi exercise has been developed specifically for arthritis patients in order to reduce their symptoms and to improve physical functioning. This quasi-experimental study examined the changes in pain, balance, muscle strength and physical functioning in women with osteoarthritis at the completion of the 12 week Tai Chi exercise program. Methods. The patients with osteoarthritis who signed the consent form were screened by their primary physician according to the inclusion criteria and invited to the study. Total of 66 osteoarthritis women with an average age of 63 years were participated in the Tai Chi exercise. At the completion of 12 weeks, 34 patients completed both pretest and posttest measures with 48% of overall dropout rate. Outcome measures were physical symptoms, balance, muscle strength, physical functioning, and depression. Paired t-test was utilized to examine differences between pre and post-measures. Results. After participating in the Tai Chi exercise program, the women with osteoarthritis showed significant improvements in their physical fitness measures, and consequently in their physical functioning. In physical fitness test, there were significant improvements in balance, flexibility, muscle strengths of knee, grip, and back muscles after the Tai Chi exercise. However, No significant differences were found in pain and stiffness of their knee joints and depression measure. Conclusion. The 12 forms of Tai Chi exercise has been found safely applicable to the older women with osteoarthritis for 12 weeks, and effective in improving balance, flexibility, and muscle strengths, and consequently lessening difficulties of performing their activities of daily life.

• Physical Therapy Korea
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• v.24 no.1
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• pp.19-29
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• 2017

Background: Patients after rotator cuff (RC) surgery experienced pain, weakness and limited of motion of the shoulder. Physical therapists have used heat therapy, electrotherapy, range of motion (ROM) exercise and other methods to treat patients after RC surgery. In addition, functional taping is also used to support joint movement and to increase shoulder joint stability. Objects: The purpose of this study was to determine the initial effects of functional taping using non-elastic tape on pain, strength and ROM of the shoulder following RC surgery. Methods: Forty-eight patients with who underwent RC surgery volunteered for this study. The subjects were randomly divided into an experimental group (EG, $n_1=25$) and a control group (CG, $n_2=23$). First, non-allergic tape was applied to the shoulder to prevent skin irritation. The EG applied functional taping using non-elastic tape and the CG applied sham taping using elastic tape. Assessment tools included the shoulder pain and disability index for functional activity score, visual analog scale for level of pain, shoulder muscle strength, hand grip strength and ROM testing. Results: Pain score in the both group significantly decreased (p<.05), and change in pain score of in the EG increased significantly than in the CG (p<.05). Shoulder strength and ROM in the both group significantly increased (p<.05). Especially external rotation and extension of the shoulder ROM in the EG increased significantly more than in the CG (p<.05), but the rate of change in the two groups showed no significant difference. Conclusion: These results suggest that functional taping using non-elastic tape was initially effective in decreasing pain score level in patients with RC surgery.

• Journal of muscle and joint health
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• v.29 no.3
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• pp.205-217
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• 2022

Purpose: This study aimed to investigate the factors affecting the subjective health status (SHS) of low-income older adults living alone. Methods: This is a cross-sectional correlational study using secondary data analysis. Sociodemographic and health-related characteristics were included in this analysis. The health-related characteristics were categorized into three domains: physical, characterized by the number of chronic diseases and fall-related factors, timed up and go, and grip strength; psychological, in terms of depression and loneliness; and social, in terms of social support. Data were analyzed using descriptive analysis, t-test, ANOVA, Pearson's correlation coefficient, and multiple linear regression analysis. Results: The mean SHS score was 2.46 out of five. Several factors influenced the SHS of low-income older adults living alone, including sex, age, level of education, monthly income, and the three domains. Four significant predictive factors of SHS in low-income older adults living alone were identified (42.5%): the number of chronic diseases, fear of falling, depression, and social support. Conclusion: SHS is a critical factor for older adults living alone on a low-income. Hence, evaluating SHS and developing interventions to improve it periodically is necessay. Such interventions should consider chronic disease management, screening and mediation for depression and fear of falling, and strengthening their social support systems.

• Clinics in Shoulder and Elbow
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• v.27 no.3
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• pp.309-315
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• 2024

Background: Radiocapitellar arthritis can cause pain, loss of motion, and impaired elbow function. Current surgical treatment options are limited. We have developed an original and simple surgical technique to address this, called arthroscopic matched osteoplasty of the radial head (AMOR). In AMOR, the radial head is partially resected and recontoured to match the capitellum and decompress the degenerate radiocapitellar articulation while preserving the ulnohumeral articulation where the cartilage is usually well preserved. Methods: Indications and the surgical technique of the AMOR procedure are described. A retrospective observational service evaluation study was conducted from electronic patient records. Collected clinical outcomes included range of motion, pain level, subjective functional score, and general satisfaction with the results of the procedure. The radiographic outcome was radiocapitellar joint space. Results: Between 2017 and 2021, eight consecutive patients underwent AMOR as part of an arthroscopic osteocapsular arthroplasty procedure. Radiographically, the mean radiocapitellar joint space improved from an average of 1.7 mm to 4.6 mm. Clinically, the mean pain score decreased from 8/10 to 3/10. Six of the eight patients (75%) were satisfied with their results. In two cases, initial improvement following surgery lasted less than 1 year, and one of these patients underwent total elbow arthroplasty for painful ulnohumeral osteoarthritis. There were no complications of surgery recorded. Conclusions: AMOR is a safe treatment option for painful radiocapitellar osteoarthritis and can be incorporated as an "add-on" procedure by surgeons performing elbow osteocapsular arthroplasty in cases with a positive grip and grind test and radiographic evidence of radiocapitellar OA. Level of evidence: IV.

• Archives of Reconstructive Microsurgery
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• v.7 no.2
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• pp.95-101
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• 1998

From march 1993 to march 1998, twenty consecutive transmetacarpal replantations and revascularizations were reviewed retrospectively. Nine patients sustained severe and diffuse crush injuries, four patients had local crush injuries, and seven suffered guillotine type amputation. Six replantations and fourteen revascularizations were performed. 76 of 81 replantable digits(93%) were salvaged. 15 patients required secondary surgery, 10 patients for tendon and joint scarring and 5 for nonunions or malunions. Intrinsic muscle function and pinch and grip strengths were weak or absent. According to Chen's grading system of functional return, 2(10%) were grade I, 6(30%) were grade II, 10(50%) were grade III, and 2(10%) grade IV. The follow-up period ranged from 6months to 46 months. Only 3 patients resumed his prior occupation(one as a supervisor); 2 were permanently disabled, 4 pursued new occupations as a manual worker, 1 were still in therapy. Only two of the manual laborers were able to return to their preinjury occupation. Despite these unacceptable functional results, all patients were satisfied with the surgery.