Evaluation of Patients with Hallux Valgus Wearing a 3D-Printed Orthosis during Walking

Sun, Pi-Chang; Shih, Shih Liang; Chen, You Yu; Lin, Kuang-Wei; Chen, Chen Shen

doi:10.3390/app11031275

Cited by 5 publications

(8 citation statements)

References 14 publications

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“…The NDWAD, developed through a 3D printer, could provide customized WADs, but for the smooth progress of the experiment, the experiment was conducted using only women's S and men's M sizes. Considering that personalized assistive devices manufactured with a 3D printer have shown positive effects in previous studies [27][28][29][30], further finger pressure reductions are to be expected if personalized NDWADs are used in the experiment.…”

Section: Discussionmentioning

confidence: 93%

Development of an Ergonomic Writing Assistive Device for Finger Pain Reduction in the Elderly

et al. 2022

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The decreased muscle mass and increased prevalence of musculoskeletal diseases in the elderly means that this population often experiences difficulty with writing. Although various commercial writing assistive devices exist to reduce pain and improve writing efficiency, low satisfaction with their design prevents them from being widely adopted. In this study, we developed a new ergonomic writing assistive device that overcomes these shortcomings and reduces finger pain. Twenty elderly people with normal writing skills participated in a performance evaluation of our designed device. We used two commercial writing assistive devices and the developed writing assistive device to write a given experimental sentence three times each for each device. For each device, finger-related muscles activity and finger pressure were measured during the experiment, and satisfaction level was evaluated using the modified QUEST 2.0 after the experiment. As a result, the activity in abductor pollicis brevis (18.16%) and first dorsal interosseous muscle (14.17%) was significantly higher when using the NDWAD (newly developed writing assistive device) than when using commercialized WADs (writing assistive devices) (p < 0.05). Finger pressure in the thumb (0.59 N), index finger (1.09 N), and middle finger (0.46 N) was significantly lower when using NDWAD than when using WADs (p < 0.05). The satisfaction level of NDWAD (4.47) was higher than that of WADs. Therefore, we confirmed that our design reduced finger pressure and improved user satisfaction. Consequently, the NDWAD developed in this study can be used as a writing aid not only for the elderly, but also for patients with writing disabilities.

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Section: Discussionmentioning

confidence: 93%

Development of an Ergonomic Writing Assistive Device for Finger Pain Reduction in the Elderly

et al. 2022

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“…18 The calculations of kinematics and kinetics in the motion analysis were the same as in our previous study. 17 MATLAB software (MathWorks Inc., Natick, MA, USA) was used to analyze the movements. To familiarize themselves with the orthosis, participants were asked to walk at their speed on a 6-m walkway.…”

Section: Methodsmentioning

confidence: 99%

“…1B). Since a nonarticulating 3D-printed HV orthosis 17 was developed in a previous study, which caused a foreign body sensation when walking, an articulating HV orthosis was developed in the study to avoid this problem. In other words, the novelty of the HV orthosis was that it made it easy to walk in the sagittal plane and correct the HV angle.…”

Section: Fabrication Of the 3d-printed Orthosismentioning

confidence: 99%

Biomechanical evaluation of 3D-printed joint-type orthosis for hallux valgus

Chen,

Chang,

Lin

et al. 2024

Journal of the Chinese Medical Association

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Background: Orthoses play an important role in the conservative treatment of hallux valgus (HV) with different therapeutic effects. In this study, a new HV orthosis was developed using three-dimensional (3D) printing technology. In addition, its kinematic effect was evaluated using motion analysis. Methods: Seventeen participants with an HV angle of >20° were included in the study. The first metatarsophalangeal abduction angle before and after the orthosis was measured statically. Subsequently, dynamic first metatarsophalangeal abduction, dorsiflexion angle and ground reaction force with and without the orthosis were recorded and calculated during walking using a Vicon motion analysis system and force plates. The patients' comfort scales were determined after the motion analysis. Results: The angular corrections of the orthosis in the first metatarsophalangeal abduction were 14.6° and 6.3° under static and dynamic conditions, respectively. Reduced hallux dorsiflexion was observed with the orthosis in the early stance phase. However, no significant changes in ground reaction forces were observed. Conclusion: The results of our study confirm the potential of the 3D-printed HV orthosis in the static and dynamic correction of deformities while ensuring patient comfort with minimal impact on hallux kinematics, suggesting the potential of our design for long-term use.

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“…5 Controlling the pronation or eversion by supporting the medial longitudinal arch by orthosis [6][7][8] may slow down the deterioration process and supplement surgical outcomes to reduce recurrence. However, as current orthosis designs rely on subjective perceptions [9][10][11] and do not take into account internal biomechanical influences, they are not as effective as they could be. The reverse-engineered orthosis has a contact surface that fits perfectly to the skin surface, while the internal skeletal anomalies lead to local stress concentrations that can cause redness and pain to the soft tissue surface.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Parametric Design of Hallux Valgus Orthosis Based on Orthogonal Analysis

Tang,

Wu,

Bao

et al. 2023

Orthopaedic Surgery

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ObjectiveTo design appropriate orthosis for hallux valgus, a difficult foot condition that affects a quarter of the body's bones, we need to clarify the numerical biomechanical features, which have not been established in previous biomechanical studies. Therefore, we constructed a finite element model of the bunion foot to investigate the orthopaedic force compensation mechanism.MethodsA patient with moderate hallux valgus was recruited. CT imaging data in DICOM format were extracted for three‐dimensional foot model reconstruction. In conjunction with the need for rapid design of bunion orthosis, a metatarsal force application sizing method based on an orthogonal test design was investigated. The orthogonal test design was used to obtain the hallux valgus angle (HVA) and the inter metatarsal angle (IMA) data for different force combinations. Based on the extreme difference analysis and analysis of variance of the test results, the influence of different force combinations on the bunion angle was quickly determined.ResultsThe results showed that the stress concentration occurred mainly in the first metatarsal bone. The distribution trend was in the medial and lateral middle of the bone and gradually decreased to the dorsal base of the bone body. The greatest stress occurs in the cartilage between the phalanges and metatarsals. In 25 groups of simulation experiments, HVA was reduced from 27.7° to 13°, and IMA was reduced from 12.5° to 7.3°.ConclusionApplying detailed orthopaedic force collocation to the first metatarsal column can effectively restore the mechanics and kinematics of hallux valgus, and provide a reference for the treatment of bunion valgus and the design of orthopaedic devices.

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Evaluation of Patients with Hallux Valgus Wearing a 3D-Printed Orthosis during Walking

Cited by 5 publications

References 14 publications

Development of an Ergonomic Writing Assistive Device for Finger Pain Reduction in the Elderly

Development of an Ergonomic Writing Assistive Device for Finger Pain Reduction in the Elderly

Biomechanical evaluation of 3D-printed joint-type orthosis for hallux valgus

Finite Element Parametric Design of Hallux Valgus Orthosis Based on Orthogonal Analysis

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