OBJECTIVE: To investigate the changes of the intramuscular temperature on buttock according to the application methods of cold jet-stream and to find the more effective method which reduces the intramuscular temperature. METHOD: Twenty eight healthy volunteers were examined. Cold-jet stream (CS) was applied on buttock (5 cm below of iliac crest, surface of gluteus medius muscle). We measured the time that skin temperature fall from room temperature to 10 degrees C (first period), the time rewarmed from 10 degrees C to 20 degrees C (second period), the time fall again to 10 degrees C (third period) and the time rewarmed again to 20 degrees C (fourth period). Cold-jet stream with infrared combination (CSIC) therapy was performed with the same method. RESULTS: At the first and third cooling periods, It took longer in CSIC group than CS group to decrease skin temperature. At fourth period, It took longer in CSIC group than CS group to rewarm skin. In CS and CSIC groups, fourth period is longer than second period. CONCLUSION: It took longer in CSIC method than CS only to decrease skin temperature to 10degrees C. Rewarming speed of skin temperature was slower twice cold-jet stream applies than once. Rewarming speed of skin temperature was slower at old-jet stream and infrared combination therapy than cold-jet only.
Buttocks* ; Healthy Volunteers ; Rewarming ; Rivers* ; Skin Temperature* ; Skin*

OBJECTIVE: To investigate the efficacy of infrared for lengthening applying time of cold-jet stream therapy without cold pain. METHOD: Each of the two methods of cryotherapy, cold-jet stream (CS) and cold-jet stream combined with infrared therapy (CSCI), was applied to the medial aspect of 32 volunteers' knees. The first phase was the required time that skin was dropped to 10oC with CS/CSCI. The second phase was the time for rewarming to 20oC without CS/CSCI. The third phase was the required time that skin dropped to 10degrees C again with CS/CSCI. The fourth phase was the time for re-warming to 20oC again without CS/CSCI. RESULTS: The required time which cold pain appeared after CS/CSCI were 51.3 sec and 62.3 sec, respectively, with significance (p<0.01). In CS and CSCI, first phase was 71.6 sec and 90.7 sec, respectively, and third phase was 33.2 sec and 39.9 sec, respectively (p<0.01). At second and fourth phases, it took 46.9 sec and 56.6 sec in CS (p<0.01), and took 46.9 sec and 54.6 sec in CSCI (p<0.01). CONCLUSION: As compared with CS, CSCI delayed sensation time of cold pain and prolonged application time of CS at the knee.
Cryotherapy ; Knee* ; Rewarming ; Rivers* ; Sensation ; Skin

OBJECTIVE: To investigate the change in plantar skin temperature in normal subjects wearing five different kinds of insoles. METHOD: Twenty normal subjects were chosen and were made to walk on a treadmill for five 30-minute sessions wearing the same shoes, and wearing five different kinds of insoles (four types were endothermic insoles, but one type was a normal insole) respectively. Subjects sat on a chair for 10 minutes before and after walking. The plantar skin temperature was recorded on 4 sites (from channel 1 to 4) on each left insole. The plantar skin temperature was recorded every 10 seconds for a total of 50 minutes, with T-type Thermocouple(R). RESULTS: There were no statistical differences in the change of plantar skin temperature for each insole before, during and after walking. No statistical differences in subjective thermal sense and Borg Rating on perceived exertion scale for each insole before, during and after walking. Time in peak plantar temperature was 25.9~28.3 minutes (after subjects starts walking), wearing normal insole. CONCLUSION: There was no statistical difference in the change of plantar skin temperature for the five different kinds of insoles However, we found this method to be effective in examining plantar skin temperature during walking.
Foot ; Shoes* ; Skin Temperature ; Walking

OBJECTIVE: This study was designed to evaluate the effect of ankle bracing (Aircast) on postural sway and limb load asymmetry (LLA) in normal adults. METHOD: 263 healthy subjects volunteered. These subjects were performed the balance test on three different conditions, 1st test fulfilled without ankle brace, 2nd test with aircast on one ankle and 3rd test with aircast on the other ankle. All subjects were divided into two groups; younger(<65 years) and older (> or = 65 years) group. Postural sway and body weight distribution were recorded while the subjects were standing on two adjacent force platforms during 30 seconds trial. All subjects chose a comfortable stance with feet apart and asked to look straight ahead at a fixed point in a quiet room. RESULTS: There were significant differences not only in LLA but also in postural sway between younger and older group. The difference of postural sway and LLA in older group was more prominent that in younger group (p<0.05). CONCLUSION: The results indicated that ankle bracing improved postural sway irrespective of age. Moreover in older group, ankle bracing on one ankle that was in the absence of LLA improved postural sway by far.
Adult ; Ankle* ; Body Weight ; Braces* ; Extremities* ; Foot ; Humans

OBJECTIVE: To determine the effects of subtalar joint ankle brace used with shoes on static postural sway and limb load asymmetry (LLA) in elderly. METHOD: 620 healthy adults volunteered. These subjects were administered with the balance test on three different conditions, with bare foot, with shoes only and with aircast and shoes. All subjects were divided into two groups; younger (<65 years) and older (> or =65 years) group and tested for LLA and postural sway with a balance tester. RESULTS: In both younger and older group, wearing shoes only and wearing ankle brace with shoes reduced the LLA and postural sway significantly compared to bare foot condition (p<0.05). In older group, there was also significant LLA and postural sway reduction in wearing ankle brace with shoes compared to wearing shoes only (p<0.05). The differences of LLA between bare foot and ankle brace with shoes in older group was more prominent than in younger group (p<0.05). CONCLUSION: Wearing a subtalar joint ankle brace with shoes improved right-left static postural balance as compared with wearing shoes alone in elderly.
Adult ; Aged ; Animals ; Ankle ; Braces ; Extremities ; Foot ; Humans ; Postural Balance ; Shoes ; Subtalar Joint

OBJECTIVE: To investigate and describe the peak plantar pressures and ground contact times of the foot during walking in diabetic patients and healthy adults. METHOD: 17 age-matched diabetic patients without any complications and 33 healthy adults participated in this study. The foot was divided into 10 different areas, and peak plantar pressures and ground contact times were measured during walking by EMED system . RESULTS: There were no significant differences in peak plantar pressures of both feet in both groups, but there were significant increases in peak plantar pressures of hindfoot and hindfoot contact times in the diabetic group. CONCLUSION: Despite having no definite diabetic neuropathy and vascular disease, diabetic patients have higher peak plantar pressures of hindfoot and prolonged hindfoot contact times because limb muscle dysfunction or impairment of proprioception may induce faster descent of the foot towards the ground or improper pattern of stance phases.
Adult* ; Diabetic Angiopathies ; Diabetic Neuropathies ; Extremities ; Foot ; Humans ; Proprioception ; Walking

OBJECTIVE: To evaluate the relationship between body mass index (BMI) and foot parameters. METHOD: We examined 1, 107 feet of 872 volunteers (male: 325, female: 547) with 3D foot scanner (Nexcan , K & I, Korea). The relations of BMI and foot parameters were analyzed by partial correlation analysis with adjusted height. We classified subjects into 4 groups by BMI; low-weight (<18.5 kg/m2), normal-weight (18.5~22.9 kg/m2), over- weight (23.0~24.9 kg/m2) and obesity (>25 kg/m2) group. The relations of these groups and foot parameters were analyzed by univariate ANOVA with fixed height. RESULTS: Instep point length, ball width and girth, waist, instep height and girth, and vamp height showed a positive relation to BMI (p<0.01). However, foot parameters related to longitudinal length and medial longitudinal arch had no significant relation to BMI (p<0.01). Ball width and girth, waist, instep height and girth, vamp height were significantly highest in obesity group compared to the other groups (p<0.05). However, foot parameters related to longitudinal length and medial longitudinal arch showed no significant difference between these 4 groups (p>0.05). CONCLUSION: This study showed that BMI was positively related to height, width, girth of foot. But, BMI had no significant relation to length of foot, and medial longitudinal arch.
Body Mass Index* ; Female ; Foot* ; Humans ; Obesity ; Volunteers

OBJECTIVE: To determine if physical factors (age, sex, weight, foot length) affected anteroposterior and intersidal weight- bearing pattern on footplate in standing posture and duration of stance phase at walking. METHOD: Participants were 578 healthy adults (250 men, 328 women). All participants were tested by Gaitview? (Alfoots, Seoul, Korea) which measure anteroposterior, intersidal weight-bearing pattern on foot plate and duration of stance phase at walking. Measurements were analyzed to find any relations among physical factors (age, sex, weight, foot length), anteorposterior, intersidal weight-bearing pattern and stance phase. RESULTS: The age, weight, foot length had no specific relations to anteroposterior weight-bearing pattern (r<0.2, p<0.05). Men had greater weight-bearing pattern on forefoot than women (p<0.01). The higher the age, the more midstance and the more delayed stance phase was noted (r>0.4, p<0.01). CONCLUSION: There was a significant correlation between sex and anteroposteior weight-bearing pattern. And there was a positive relation between age and stance, midstance phase.
Adult ; Female ; Foot ; Humans ; Male ; Posture ; Ursidae ; Walking ; Weight-Bearing

OBJECTIVES: Rapid polymerization of overlying composite resin causes high polymerization shrinkage stress at the adhesive layer. In order to alleviate the shrinkage stress, increasing the light intensity over the first 5 seconds was suggested as an exponential curing mode by an LED light curing unit (Elipar FreeLight2, 3M ESPE). In this study, the effectiveness of the exponential curing mode on reducing stress was evaluated with measuring microtensile bond strength of three adhesives after the overlying composite resin was polymerized with either continuous or exponential curing mode. METHODS: Scotchbond Multipurpose Plus (MP, 3M ESPE), Single Bond 2 (SB, 3M ESPE), and Adper Prompt (AP, 3M ESPE) were applied onto the flat occlusal dentin of extracted human molar. The overlying hybrid composite (Denfil, Vericom, Korea) was cured under one of two exposing modes of the curing unit. At 48h from bonding, microtensile bond strength was measured at a crosshead speed of 1.0 mm/min. The fractured surfaces were observed under FE-SEM. RESULTS: There was no statistically significant difference in the microtensile bond strengths of each adhesive between curing methods (Two-way ANOVA, p > 0.05). The microtensile bond strengths of MP and SB were significantly higher than that of AP (p < 0.05). Mixed failures were observed in most of the fractured surfaces, and differences in the failure mode were not observed among groups. CONCLUSION: The exponential curing method had no beneficial effect on the microtensile dentin bond strengths of three adhesives compared to continuous curing method.
Adhesives ; Bisphenol A-Glycidyl Methacrylate ; Chimera ; Dentin ; Humans ; Light ; Molar ; Polymerization ; Polymers ; Resin Cements

OBJECTIVE: This study was carried out to investigate if the measurement of range of motion(ROM) could be applied in the diagnosis of Myofascial Pain Syndrome(MPS) and to determine the severity by analyzing ROM in MPS patients. METHODS: The study subjects were 476 female telephone number information service workers. Southampton Protocol and Pittsburgh Protocol were used to diagnose MPS and to measure ROM. ROMs were measured by 2 inclinometers exercising each shoulder passively and actively in 5 directions ; abduction, forward flexion, extension, external rotation, and internal rotation. RESULTS: Compared to the normal group (n=147), the mean of right side ROM in the subjects (n=270) with same side MPS was 2.1 degrees(SD=11.5) lesser in active extension and 1.7 degrees(SD=10.4) lesser in passive extension. Compared to the mild group (n=210), the mean of right side ROM in the patients with same side severe MPS (n=58) was lesser in all directions. Especially in active forward flexion, passive forward flexion, active extension, passive extension and active external rotation, ROM in the subjects with severe MPS was lesser by 6.5 degrees(SD=13.1), 5.1 degrees(SD=12.8), 5.9 degrees(SD=11.8), 5.0 degrees(SD=10.6) and 3.9 degrees(SD=9.8), respectively, than those of the subjects with mild MPS. Compared to the subjects with left side mild MPS(n=172), ROM in the subjects with left side severe MPS (n=59) was 5.3 degrees(SD=13.3) lesser in active forward flexion. CONCLUSIONS: In this study, ROMs in the subjects with severe MPS tended to be lesser than those in mild patients. This tendency was more prominent in the right side than the left, active range of motion than passive and forward flexion and extension than others. The results of this study are expected to help diagnose shoulder MPS and determine severity.
Diagnosis ; Female ; Humans ; Information Services ; Myofascial Pain Syndromes* ; Range of Motion, Articular* ; Shoulder* ; Telephone