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Dynamic measurements of musculus tibialis anterior ligaments with different angles
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Abstracts / Journal of Biomechanics 44 (2011) ee1–e21
drop foot also include multiple sclerosis, amyotrophic lateral sclerosis (ALS), Parkinson’s disease, Lou Gehrig’s disease, and muscular dystrophy. The aim of the study is to get some numerical data on tibialis anterior muscle during dorsiflexion, plantar flexion, inversion and eversion of the foot. 9 cases were compared with left and right foot including 4 neurological disability and 5 healthy people. In four neurological disabled patients, the muscle force differences between healthy and normal legs are obtained as 9 N/81 N, 49 N/78 N, 182 N/58 N and 89 N/0 N. In conclusion, we obtain some in vivo data showing that there are important differences in forces of muscles between the healthy and drop foot patients. These numerical data will help us to develop new orthosis and drop foot shoes for treatment of drop foot syndrome. doi: 10.1016/j.jbiomech.2011.02.021
Comparison of the radioactivity and biomechanical properties of strontium and magnesium composites and chitosan, chitin Salih Celik a, Bora Uzun a, Aysegul Yurt b, C - a˘grı Havıtc- ıo˘glu c, Ahmet Karakasli d a
Dokuz Eylul University, The Institute of Health Science, Department of Biomechanics, Turkey b Dokuz Eylul University, Health Services Vocational School, Department of Radiology, Turkey c Near East University, Medicine Faculty, Turkey d Tire State Hospital, Turkey Lead material is usually used to protect from X-ray for medical or other purposes. The aim of this project is the development of a new material to protect from X-rays. For this purpose, composite samples from four different groups were prepared as a film tablet. In the first group chitosan, the second one Sr (strontium), the third one chitin, the fourth one Mg (magnesium) were used in the same percentages. 66 kV–81 kV–102 kV–150 kV X-ray was performed on composite samples for 15.5 ms–15.2 ms–15.0 ms–17.6 ms and for 4 mA s– 3.2 mA s 2.5 mA s2 mA s, respectively. The distance of the materials and anode was 1.10 m in this test. Each sample was placed on bone and muscle tissue for the simulation of the real situation in the body. After performing X-ray on the samples, the biomechanical tests were performed by using the axial compression testing machine (AG-I 10 kN, Shimadzu, Japan). The axial compression was applied to all specimens with the loading speed of 5 mm/min (max. 100 N). The compression tests were performed at room temperature. It was found that Sr (strontium) has the best X-ray protection and mechanical resistance among these groups. In conclusion, Sr and Sr composites materials can be used for medical protection and other purposes in the future instead of lead. doi: 10.1016/j.jbiomech.2011.02.022
The biomechanical effects of adductor hallusis tendon on hallux valgus deformity Mehmet Erduran a, Bora Uzun b, Berivan Cecen b, Onur Gursan b, Diler Erdemli b, Hasan Havıtc-ıo˘glu b,c a
Balikkesir University, Medicine Faculty, Department of Orthopedics and Traumatology, Turkey b Dokuz Eylul University, The Institute of Health Science, Department of Biomechanics, Turkey c Dokuz Eylul University, Medicine Faculty, Department of Orthopedics and Traumatology, Turkey The aetiology and treatment of hallux valgus (HV) has led to much controversy. The deformity comprises of medial deviation of the first metatarsal, giving rise to a widened forefoot and lateral deviation with or without pronation of the hallux. HV deformity correlates with the first/second intermetatarsal angle (IMA). The contribution of the soft tissues in the development of HV is unclear. Muscle imbalance does not explain an increased IMA, but the bow-stringing effect of the long flexors and extensors once the medial joint capsule has become incompetent will exacerbate the deformity. The tendons of abductor and adductor hallucis run on the plantar medial and plantar lateral aspects, respectively, to insert into the base of the proximal phalanx and adjacent sesamoids. We aim to evaluate the biomechanical stability and hallux valgus deformities on amputees legs. Each of five belowthe-knee amputation specimens were inserted into the device. We put the two markers on the second metatarsal longitudinal axis. Also we place the goniometer to measure the IMA. We record the test before and after the adductor hallusis tendon release. The biomechanical tests were performed by using the axial compression testing machine (AG-I 10 kN, Shimadzu, Japan). The displacements between the first and second metatarsal axis were measured with two non-contact CCD camera extensometers (Non-contact Video Extensometer DVE-101/201, Shimadzu, Japan). The axial compression was applied to all amputee legs with the loading speed of 5 mm/min (max. 800 N). The data of force-displacement variation was evaluated with parametric test using SPSS 11.0 for Windows. Compression tests were compared with Kruskal–Wallis test. Data showed that plain foot position and incision of hallux valgus are statistically significant (p ¼0.009). When the hallux valgus angle of amputee legs was compared, our study indicated that plain foot position showed 2.81 and first metatarsal head of a foot showed 1.61. In conclusion, the adductor hallusis tendon release affected the restored IMA and hallux valgus deformity. We conclude that the adductor hallucis tendon may be useful as a tenodesis for reconstructing the deformity of acquired hallux valgus. doi: 10.1016/j.jbiomech.2011.02.023
Abstracts / Journal of Biomechanics 44 (2011) ee1–e21
drop foot also include multiple sclerosis, amyotrophic lateral sclerosis (ALS), Parkinson’s disease, Lou Gehrig’s disease, and muscular dystrophy. The aim of the study is to get some numerical data on tibialis anterior muscle during dorsiflexion, plantar flexion, inversion and eversion of the foot. 9 cases were compared with left and right foot including 4 neurological disability and 5 healthy people. In four neurological disabled patients, the muscle force differences between healthy and normal legs are obtained as 9 N/81 N, 49 N/78 N, 182 N/58 N and 89 N/0 N. In conclusion, we obtain some in vivo data showing that there are important differences in forces of muscles between the healthy and drop foot patients. These numerical data will help us to develop new orthosis and drop foot shoes for treatment of drop foot syndrome. doi: 10.1016/j.jbiomech.2011.02.021
Comparison of the radioactivity and biomechanical properties of strontium and magnesium composites and chitosan, chitin Salih Celik a, Bora Uzun a, Aysegul Yurt b, C - a˘grı Havıtc- ıo˘glu c, Ahmet Karakasli d a
Dokuz Eylul University, The Institute of Health Science, Department of Biomechanics, Turkey b Dokuz Eylul University, Health Services Vocational School, Department of Radiology, Turkey c Near East University, Medicine Faculty, Turkey d Tire State Hospital, Turkey Lead material is usually used to protect from X-ray for medical or other purposes. The aim of this project is the development of a new material to protect from X-rays. For this purpose, composite samples from four different groups were prepared as a film tablet. In the first group chitosan, the second one Sr (strontium), the third one chitin, the fourth one Mg (magnesium) were used in the same percentages. 66 kV–81 kV–102 kV–150 kV X-ray was performed on composite samples for 15.5 ms–15.2 ms–15.0 ms–17.6 ms and for 4 mA s– 3.2 mA s 2.5 mA s2 mA s, respectively. The distance of the materials and anode was 1.10 m in this test. Each sample was placed on bone and muscle tissue for the simulation of the real situation in the body. After performing X-ray on the samples, the biomechanical tests were performed by using the axial compression testing machine (AG-I 10 kN, Shimadzu, Japan). The axial compression was applied to all specimens with the loading speed of 5 mm/min (max. 100 N). The compression tests were performed at room temperature. It was found that Sr (strontium) has the best X-ray protection and mechanical resistance among these groups. In conclusion, Sr and Sr composites materials can be used for medical protection and other purposes in the future instead of lead. doi: 10.1016/j.jbiomech.2011.02.022
The biomechanical effects of adductor hallusis tendon on hallux valgus deformity Mehmet Erduran a, Bora Uzun b, Berivan Cecen b, Onur Gursan b, Diler Erdemli b, Hasan Havıtc-ıo˘glu b,c a
Balikkesir University, Medicine Faculty, Department of Orthopedics and Traumatology, Turkey b Dokuz Eylul University, The Institute of Health Science, Department of Biomechanics, Turkey c Dokuz Eylul University, Medicine Faculty, Department of Orthopedics and Traumatology, Turkey The aetiology and treatment of hallux valgus (HV) has led to much controversy. The deformity comprises of medial deviation of the first metatarsal, giving rise to a widened forefoot and lateral deviation with or without pronation of the hallux. HV deformity correlates with the first/second intermetatarsal angle (IMA). The contribution of the soft tissues in the development of HV is unclear. Muscle imbalance does not explain an increased IMA, but the bow-stringing effect of the long flexors and extensors once the medial joint capsule has become incompetent will exacerbate the deformity. The tendons of abductor and adductor hallucis run on the plantar medial and plantar lateral aspects, respectively, to insert into the base of the proximal phalanx and adjacent sesamoids. We aim to evaluate the biomechanical stability and hallux valgus deformities on amputees legs. Each of five belowthe-knee amputation specimens were inserted into the device. We put the two markers on the second metatarsal longitudinal axis. Also we place the goniometer to measure the IMA. We record the test before and after the adductor hallusis tendon release. The biomechanical tests were performed by using the axial compression testing machine (AG-I 10 kN, Shimadzu, Japan). The displacements between the first and second metatarsal axis were measured with two non-contact CCD camera extensometers (Non-contact Video Extensometer DVE-101/201, Shimadzu, Japan). The axial compression was applied to all amputee legs with the loading speed of 5 mm/min (max. 800 N). The data of force-displacement variation was evaluated with parametric test using SPSS 11.0 for Windows. Compression tests were compared with Kruskal–Wallis test. Data showed that plain foot position and incision of hallux valgus are statistically significant (p ¼0.009). When the hallux valgus angle of amputee legs was compared, our study indicated that plain foot position showed 2.81 and first metatarsal head of a foot showed 1.61. In conclusion, the adductor hallusis tendon release affected the restored IMA and hallux valgus deformity. We conclude that the adductor hallucis tendon may be useful as a tenodesis for reconstructing the deformity of acquired hallux valgus. doi: 10.1016/j.jbiomech.2011.02.023