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In the future, using a more accurate nucleus replacement device would enhance the precision of our test fixture. Although we created a waterproof container for our swelling test, the current testing device does not exactly mimic a nucleus replacement device. Currently, we use a sponge as a substitute, which behaves differently from a true nucleus replacement device. More accurate results could be obtained by using a surrogate annulus with a fully enclosed cavity, which would better simulate the actual conditions within the body. However, designing this surrogate annulus requires considering how to remove the nucleus replacement device from the mold. Additionally, using a physiological solution that better mimics the intervertebral disc's composition, which affects viscosity, could yield more realistic results.
Image gotten from: https://www.wheelessonline.com/issls/lumbar-intervertebral-discs-anatomy/
Automating the test fixture could also improve usability, efficiency, and productivity. Currently, the top plate is moved manually using hex nuts. Automation would need to ensure the top plate does not damage the sensitive load cell or the watertight chamber by forcing down too hard or moving too quickly.
Image gotten from: https://www.vecteezy.com/vector-art/22377680-automation-vector-outline-icons-simple-stock-illustration-stock
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