diplomsko delo
Kaja Carli (Author), Miha Fošnarič (Reviewer), Tomaž Lampe (Mentor), Monika Pavlović (Co-mentor)

Abstract

Uvod: Analize človeške hoje so pokazale, da gleženjski sklep k hoji pripomore bistveno več kot kolenski in kolčni sklep. Eden največjih izzivov pri izdelavi nožne proteze je nadomeščanje funkcije gležnja in stopala, saj imata slednja pomembno vlogo pri amortizaciji, prenašanju teže, stabilnosti in odrivu. Namen: Namen diplomskega dela je ustvariti protetično stopalo, ga natisniti s 3D-tiskalnikom in testirati s stiskalnico, pri čemer je cilj preverba prenašanja obremenitev in s tem povzročenih premikov po navpični osi, po kateri se stopalo upogne. Preverili smo tudi, pri kolikšni sili se stopalo plastično deformira in v katerem delu stopala se ta deformacija pojavi. Metode dela: S pomočjo programske opreme smo izdelali model stopala in ga natisnili s tridimenzionalnim tiskalnikom. Natisnili smo tri popolnoma enake modele in jih s pomočjo stiskalnice vsakega testirali v drugačnem položaju. Rezultati: Vsak model smo testirali v drugačnem položaju: prvega v nevtralnem položaju, drugega v dorzalni fleksiji in tretjega v plantarni fleksiji. Vse modele smo na začetku obremenili s silo 100 N in jo povečevali po 100 N do deformacije. Pri prvem modelu se je največji premik po navpični osi zgodil pri 2200 N in je znašal 15,49 mm, stopalo pa je pri sili 2300 N počilo. Drugi model se je plastično deformiral pri 1400 N, največji premik 16,58 mm pa se je zgodil pri 1300 N. Tretji model stopala smo testirali do sile 1500 N, kjer je počilo, največji premik 34,61 mm pa je nastal pri 1400 N. Razprava in zaključek: Dokazali smo, da v nevtralnem položaju pride do manjšega premika po navpični osi v primerjavi z enako obremenitvijo pri postavitvi stopala v plantarni in dorzalni fleksiji. Ugotovili smo, da so premiki po navpični osi ob enaki obremenitvi večji v plantarni fleksiji kot v dorzalni fleksiji stopala. V prihodnosti bi v raziskavah priporočali uporabo drugega materiala, izboljšanje modela stopala in spremembe pri načinu prenosa sile na stopalo, da bi bilo bolj podobno obremenitvam med hojo.

Keywords

diplomska dela;aortotika in protetikaprotetika;stopalo;protetično stopalo;tridimenzionalna tehnologija;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL ZF - University College of Health Studies
Publisher: [K. Carli]
UDC: 617.3
COBISS: 74398979 Link will open in a new window
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Other data

Secondary language: English
Secondary title: Fabrication and evaluation of prosthetic foot using three-dimensional technology
Secondary abstract: Introduction: Gait analysis in humans show that the ankle joint contributes much more to walking than the knee and hip joints. One of the major challenges in the development of lower limb prostheses is the replacement of ankle and foot function, as they play an important role in shock absorption, weight bearing, stability, and propulsion. Purpose: The purpose of this thesis is to design a prosthetic foot, print it out with a printer, and test it with a press to check the load capacity and the resulting movements along the vertical axis around which the foot bends. We also test how much force is required to plastically deform the foot and in which part of the foot this deformation occurs. Methods: We created a three-dimensional model of the foot using modeling software and printed it using a three-dimensional printer. We printed three identical models and tested them in different positions using a press. Results: All models were initially loaded with 100 N and the force was increased by 100 N until deformation occurred. For the first model, the maximum displacement of 15.49 mm along the vertical axis occurred at 2200 N. The foot deformed plastically at a force of 2300 N. The second model deformed at 1400 N, while the maximum displacement of 16.58 mm occurred at 1300 N. The third model of the foot was tested with a force of 1500 N, where it deformed plastically, and the maximum displacement of 34.61 mm occurred at 1400 N. Discussion and conclusion: Results show that the foot in the neutral position has lower displacement values along the vertical axis than the foot in plantar and dorsiflexion at the same load. We found that the displacements along the vertical axis are greater in plantar flexion than in dorsiflexion for the same load. In the future, we recommend using a different material, a better model design, and changing the method of applying force to the foot to more closely resemble the forces that occur during walking.
Secondary keywords: diploma theses;orthotics and prostheticsprosthetics;foot;prosthetic foot;three-dimensional technology;
Type (COBISS): Bachelor thesis/paper
Study programme: 0
Thesis comment: Univ. v Ljubljani, Zdravstvena fak., Oddelek za protetiko
Pages: 27 str.
ID: 13285824