Exact(7)
Based on the total tip migration, 1 prosthesis showed rapid initial migration without any tendency to stabilize.
5 years after implantation, 1 case of progressive subsidence due to poor cement technique required revision; only the stem was changed. 1 prosthesis was revised due to persistent and unexplained pain; the implant was not loose.
This is in line with Whitehead et al. [ 24] demonstrating radiolucent lines in 6% of the tibial components and Vogt et al. [ 25] with 7% of tibial radiolucencies appearing in cemented (n = 2) and cementless (n = 1) prosthesis.
3 of the 39 prostheses were revised: 1 prosthesis was revised because of dislocation following excessive subsidence due to usage of an undersized component and 2 prostheses, which were both firmly fixed, were revised due to severe, persistent thigh pain.
A subsidence level of 1.2 mm at 2-year follow-up has been found to be a strong indicator of early or medium-term revision for the cemented cobalt-chromium Lubinus SP 1 prosthesis (LINK) (Karrholm et al. 1994).
In 1 prosthesis, a radiolucent line of 1 2 mm was present in zones 1 and 4, and in 1 prosthesis a radiolucent line of > 2 mm was present in zone 1 and one of 1 – 2 mm was present in zone 4. In another prosthesis, a radiolucent line of > 2 mm was present in both zone 1 and zone 4. Stress shielding was noted in zone 5 in 5 patients.
Similar(53)
Kudo type-5 prosthesis.
The mean SS improves after L5 S1 prosthesis (from 35.4° to 36.3°) and L4 L5 prosthesis (from 36.2° to 37.4°).
The authors found an improvement only after L5-S1 prosthesis.
This study proves the efficacy of customized PMMA prefabricated 3D prosthesis.
The Charnley flanged 40 prosthesis (DePuy International, Leeds, UK) was implanted.
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