Quote:
Originally Posted by WakesurfMike
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Fatigue and wear tests
Wear tests were conducted in a 3-axis motion simulator according to the following protocol (Fig. 7):
- Series of 10 million cycles of flexion, extension, and lateral tilting
- Frequency = 4 Hz
- Loads of 135–1,350 N
- Inclination of the prosthesis at 45° to reproduce the sagittal orientation of the disk in functional situations
- In a demineralized water bath at 37 °C
Am I the only one concerned that a load of 135 N isn't very much? I mean sure, if they do 40 million cycles at 1,350 N... Highly impressive. But no indication of what the distribution of those force ranges were.
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L4-L5 Broad Diffuse Bulge, mildly contacting left L5 nerve root
L5-S1 Broad Central Disc Protrusion mildly impinging left S1 nerve root
"Mild scoliosis of lumbar spine".
Four central disc protrusions in thoracic spine.
C5-C6, C6-C7 bulging, bone spurs. Imaging not looking good. Successful CP-ESP's placed in Oct 2019 by Dr. Desai.
Delayed lumbar surgery to work on bone density. Considering options now, some but minimal bone density improvement. Will only use LP-ESP.
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