Characterising the Mould Rectification Process for Designing Scoliosis Braces: Towards Automated Digital Design of 3D-Printed Braces
| Autor: | Pujitha Silva, Dhammika Halwala-Vithanage, Inigo Sanz-Pena, Sanjaya Mallikarachchi, Shanika M.A. Arachchi, Alison H. McGregor, Jeewantha Kirumbara-Liyanage, Nicolas Newell |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Scanner orthosis design QH301-705.5 Computer science QC1-999 0206 medical engineering 02 engineering and technology 03 medical and health sciences digital design 0302 clinical medicine Software Rectification General Materials Science 3D scanning Biology (General) QD1-999 Instrumentation Fluid Flow and Transfer Processes 030222 orthopedics business.industry Physics Process Chemistry and Technology General Engineering Process (computing) Centroid Structural engineering Engineering (General). Civil engineering (General) 020601 biomedical engineering Brace Computer Science Applications sculpting software Chemistry Transverse plane Tilt (optics) plaster-casting adolescent idiopathic scoliosis TA1-2040 business scoliosis brace |
| Zdroj: | Applied Sciences Volume 11 Issue 10 Applied Sciences, Vol 11, Iss 4665, p 4665 (2021) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app11104665 |
| Popis: | The plaster-casting method to create a scoliosis brace consists of mould generation and rectification to obtain the desired orthosis geometry. Alternative methods entail the use of 3D scanning and CAD/CAM. However, both manual and digital design entirely rely on the orthotist expertise. Characterisation of the rectification process is needed to ensure that digital designs are as efficient as plaster-cast designs. Three-dimensional scans of five patients, pre-, and post-rectification plaster moulds were obtained using a Structure Mark II scanner. Anatomical landmark positions, transverse section centroids, and 3D surface deviation analyses were performed to characterise the rectification process. The rectification process was characterised using two parameters. First, trends in the external contours of the rectified moulds were found, resulting in lateral tilt angles of 81 ± 3.8° and 83.3 ± 2.6° on the convex and concave side, respectively. Second, a rectification ratio at the iliac crest (0.23 ± 0.04 and 0.11 ± 0.02 on the convex and concave side, respectively) was devised, based on the pelvis width to estimate the volume to be removed. This study demonstrates that steps of the manual rectification process can be characterised. Results from this study can be fed into software to perform automatic digital rectification. |
| Databáze: | OpenAIRE |
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