Biomechanical Evaluation and Strength Test of 3D-Printed Foot Orthoses
Foot orthoses (FOs) are commonly used as interventions for individuals with flatfoot. Advances in technologies such as three-dimensional (3D) scanning and 3D printing have facilitated the fabrication of custom FOs. However, few studies have been conducted on the mechanical properties and biomechanic...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Applied Bionics and Biomechanics |
| Online Access: | http://dx.doi.org/10.1155/2019/4989534 |
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| author | Kuang-Wei Lin Chia-Jung Hu Wen-Wen Yang Li-Wei Chou Shun-Hwa Wei Chen-Sheng Chen Pi-Chang Sun |
| author_facet | Kuang-Wei Lin Chia-Jung Hu Wen-Wen Yang Li-Wei Chou Shun-Hwa Wei Chen-Sheng Chen Pi-Chang Sun |
| author_sort | Kuang-Wei Lin |
| collection | DOAJ |
| description | Foot orthoses (FOs) are commonly used as interventions for individuals with flatfoot. Advances in technologies such as three-dimensional (3D) scanning and 3D printing have facilitated the fabrication of custom FOs. However, few studies have been conducted on the mechanical properties and biomechanical effects of 3D-printed FOs. The purposes of this study were to evaluate the mechanical properties of 3D-printed FOs and determine their biomechanical effects in individuals with flexible flatfoot. During mechanical testing, a total of 18 FO samples with three orientations (0°, 45°, and 90°) were fabricated and tested. The maximum compressive load and stiffness were calculated. During a motion capture experiment, 12 individuals with flatfoot were enrolled, and the 3D-printed FOs were used as interventions. Kinematic and kinetic data were collected during walking by using an optical motion capture system. A one-way analysis of variance was performed to compare the mechanical parameters among the three build orientations. A paired t-test was conducted to compare the biomechanical variables under two conditions: walking in standard shoes (Shoe) and walking in shoes embedded with FOs (Shoe+FO). The results indicated that the 45° build orientation produced the strongest FOs. In addition, the maximum ankle evertor and external rotator moments under the Shoe+FO condition were significantly reduced by 35% and 16%, respectively, but the maximum ankle plantar flexor moments increased by 3%, compared with the Shoe condition. No significant difference in ground reaction force was observed between the two conditions. This study demonstrated that 3D-printed FOs could alter the ankle joint moments during gait. |
| format | Article |
| id | doaj-art-36bc7ea1b6ba4553b480959c179ea3e7 |
| institution | OA Journals |
| issn | 1176-2322 1754-2103 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Applied Bionics and Biomechanics |
| spelling | doaj-art-36bc7ea1b6ba4553b480959c179ea3e72025-08-20T02:07:45ZengWileyApplied Bionics and Biomechanics1176-23221754-21032019-01-01201910.1155/2019/49895344989534Biomechanical Evaluation and Strength Test of 3D-Printed Foot OrthosesKuang-Wei Lin0Chia-Jung Hu1Wen-Wen Yang2Li-Wei Chou3Shun-Hwa Wei4Chen-Sheng Chen5Pi-Chang Sun6Department of Physical Therapy and Assistive Technology, National Yang-Ming University, Taipei, TaiwanDepartment of Physical Therapy and Assistive Technology, National Yang-Ming University, Taipei, TaiwanDepartment of Sports Medicine, China Medical University, Taichung, TaiwanDepartment of Physical Therapy and Assistive Technology, National Yang-Ming University, Taipei, TaiwanDepartment of Physical Therapy and Assistive Technology, National Yang-Ming University, Taipei, TaiwanDepartment of Physical Therapy and Assistive Technology, National Yang-Ming University, Taipei, TaiwanDepartment of Rehabilitation Medicine, Taipei City Hospital, Taipei, TaiwanFoot orthoses (FOs) are commonly used as interventions for individuals with flatfoot. Advances in technologies such as three-dimensional (3D) scanning and 3D printing have facilitated the fabrication of custom FOs. However, few studies have been conducted on the mechanical properties and biomechanical effects of 3D-printed FOs. The purposes of this study were to evaluate the mechanical properties of 3D-printed FOs and determine their biomechanical effects in individuals with flexible flatfoot. During mechanical testing, a total of 18 FO samples with three orientations (0°, 45°, and 90°) were fabricated and tested. The maximum compressive load and stiffness were calculated. During a motion capture experiment, 12 individuals with flatfoot were enrolled, and the 3D-printed FOs were used as interventions. Kinematic and kinetic data were collected during walking by using an optical motion capture system. A one-way analysis of variance was performed to compare the mechanical parameters among the three build orientations. A paired t-test was conducted to compare the biomechanical variables under two conditions: walking in standard shoes (Shoe) and walking in shoes embedded with FOs (Shoe+FO). The results indicated that the 45° build orientation produced the strongest FOs. In addition, the maximum ankle evertor and external rotator moments under the Shoe+FO condition were significantly reduced by 35% and 16%, respectively, but the maximum ankle plantar flexor moments increased by 3%, compared with the Shoe condition. No significant difference in ground reaction force was observed between the two conditions. This study demonstrated that 3D-printed FOs could alter the ankle joint moments during gait.http://dx.doi.org/10.1155/2019/4989534 |
| spellingShingle | Kuang-Wei Lin Chia-Jung Hu Wen-Wen Yang Li-Wei Chou Shun-Hwa Wei Chen-Sheng Chen Pi-Chang Sun Biomechanical Evaluation and Strength Test of 3D-Printed Foot Orthoses Applied Bionics and Biomechanics |
| title | Biomechanical Evaluation and Strength Test of 3D-Printed Foot Orthoses |
| title_full | Biomechanical Evaluation and Strength Test of 3D-Printed Foot Orthoses |
| title_fullStr | Biomechanical Evaluation and Strength Test of 3D-Printed Foot Orthoses |
| title_full_unstemmed | Biomechanical Evaluation and Strength Test of 3D-Printed Foot Orthoses |
| title_short | Biomechanical Evaluation and Strength Test of 3D-Printed Foot Orthoses |
| title_sort | biomechanical evaluation and strength test of 3d printed foot orthoses |
| url | http://dx.doi.org/10.1155/2019/4989534 |
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