Design of a Rapid Fabrication Custom-Fit CROW Orthosis
Notice bibliographique
Résumé
The Client, Anderson Orthopedics, is looking to use Additive Manufacturing to improve their manufacturing time for a support device called the Charcot Restraint Orthotic Walker (CROW). The function of a CROW Orthosis is to offload and support the patients’ foot and support the existing sole geometry when the joints in the foot are weakened and cannot properly support weight. Patients that require a CROW orthosis have a high risk of lower limb amputation if they continue to load their foot without proper support. Thus, it is critical that patients receive their CROW orthosis as soon as possible. Excessively long manufacturing times delay patients from starting their treatment and increase their risk of lower limb amputation. The objectives of this project were to design a 3D Printable CROW Orthosis that performs the same as the current design but takes less time to manufacture than the current design. The objective was to have the new manufacturing process take less than 15 hours and cost less than CAD$1,000. The new design must be able to use in an environment like Winnipeg, where the temperature ranges from -30°C to 30°C, as well as prevent water from seeping in. The design must also support the weight of the patient without yielding. In addition, the design should last the treatment period, which is typically 1 year. The final design took a modular approach to solve the Client’s problems. The outer shell is composed of four MJF Nylon 123D printed components, which split the limb between anterior and posterior with segments for the calf, and two for the ankle-foot. Both posterior components glued to one another and further stiffened with aluminum rods. To provide user comfort, a lined PPT foam is glued into the inside of the shells. A rocker sole designed into it to reduce the manufacturing time. Ratcheting BOA straps are used to hold the posterior and anterior shells together, as well as provide easy adjustability for the patient. Further adjustability for swelling was accommodated through a square wave pattern between the anterior and posterior shells. The time to print and cool the parts of the design is 24 hours. The cost associated with this design was CAD$1,945.93. These results did not meet the objectives for the manufacturing process but do allow for fewer technician hours at Anderson Orthopedics. For the design, the material that was identified is waterproof and functions within the specified temperature range. The FEA showed that yielding does occur during the more extreme loading cases of the walking cycle. The final design and manufacturing process did not meet all of objectives that were established, and for those that were not met, future recommendations were made for they could be met in future work.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,001 |
| Bibliométrie | 0,001 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,001 | 0,000 |
| Science ouverte | 0,001 | 0,000 |
| Intégrité de la recherche | 0,001 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,005 | 0,002 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».