Structural simulation of a bone-prosthesis system of the knee joint

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Abstract

In surgical knee replacement, the damaged knee joint is replaced with artificial prostheses. An accurate clinical evaluation must be carried out before applying knee prostheses to ensure optimal outcome from surgical operations and to reduce the probability of having long-term problems. Useful information can be inferred from estimates of the stress acting onto the bone-prosthesis system of the knee joint. This information can be exploited to tailor the prosthesis to the patient's anatomy. We present a compound system for pre-operative surgical planning based on structural simulation of the bone-prosthesis system, exploiting patient-specific data.

Figures

  • Figure 1. Scheme of our system for pre-operative planning of knee replacement surgery.
  • Figure 2. A CT scan of a 80-years-old patient, affected by osteoporosis and arthrosis. A manual labelling is also shown together with the relative distribution of Hounsfield Units (HU) values of two tissue classes: soft tissue and trabecular bone.
  • Table 1. Parameter settings used for the acquisition of the knee CT data employed in our experiments.
  • Figure 3. Rejection rule. Probability distributions for two classes, conditioned by the HU value (our simplest feature). The threshold ε is used for rejection of low-probability classifications (see text). The shadowed region depicts the rejection interval.
  • Figure 4. Multiscale feature descriptors employed.
  • Figure 5. An example of a slice classified using our classification method. The colour codes are as follows: White for cortical bone, blue for trabecular bone, red for soft tissue, and black for background.
  • Figure 6. Surface model showing of the cortical tissue of a knee joint. Notice that the the bones of the articulation are neatly separated.
  • Figure 7. Determination of the mechanical viscoelastic parameters of the bone.

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CITATION STYLE

APA

Andrä, H., Battiato, S., Bilotta, G., Farinella, G. M., Impoco, G., Orlik, J., … Zemitis, A. (2008). Structural simulation of a bone-prosthesis system of the knee joint. Sensors, 8(9), 5897–5926. https://doi.org/10.3390/s8095897

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