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- Title
Roentgen stereophotogrammetric analysis: an effective tool to predict implant survival after an all-poly unicompartmental knee arthroplasty-a 10 year follow-up study.
- Authors
Bruni, Danilo; Bragonzoni, Laura; Gagliardi, Michele; Bontempi, Marco; Akkawi, Ibrahim; Raspugli, Giovanni; Iacono, Francesco; Patella, Silvio; Marcacci, Maurilio; Raspugli, Giovanni Francesco
- Abstract
<bold>Purpose: </bold>The main purpose of the present study was to determine long-term implant fixation of 15 unicompartmental knee arthroplasty (UKAs) with an all-poly tibial component using Roentgen stereophotogrammetric analysis (RSA) at a mean 10-year follow-up. The secondary purpose was to investigate whether the progressive loss of implant's fixation correlates with a reduction in Knee society score (KSS).<bold>Methods: </bold>Fifteen non-consecutive patients with primary knee osteoarthritis received a UKA with an all-poly tibial component were assessed using KSS scores pre-operatively and post-operatively and RSA on day 2 after surgery, then at 3, 6, and 12 months and yearly thereafter. The mean last follow-up was 10 years.<bold>Results: </bold>An increase in maximum total point motion (MTPM) values from 6 months to 1 year post-operatively was found respect to post-operative reference. Implants' displacement values were always <2 mm during the first 6 months, and then, two different trends were noticed in revised and non-revised implants. MTPM increase between 1 and 2 years of follow-up in non-revised UKAs was always <0.2 mm, whereas it was >0.2 mm in revised UKAs. A linear and negative correlation with statistical significance was found between MTPM and both clinical and functional KSS scores (p < 0.001).<bold>Conclusion: </bold>Also in a long-term follow-up evaluation, RSA is an effective tool to predict functional results after an all-poly UKA providing also a relevant predictive value at 1 year follow-up, and this can be very useful for both patients and surgeons.<bold>Level Of Evidence: </bold>Diagnostic studies, Level III.
- Subjects
KNEE radiography; KNEE surgery; ARTIFICIAL joints; KNEE; KNEE diseases; LONGITUDINAL method; OSTEOARTHRITIS; PROSTHETICS; COMPLICATIONS of prosthesis; TOTAL knee replacement; TREATMENT effectiveness; RADIOSTEREOMETRY
- Publication
Knee Surgery, Sports Traumatology, Arthroscopy, 2015, Vol 23, Issue 11, p3273
- ISSN
0942-2056
- Publication type
journal article
- DOI
10.1007/s00167-014-3106-2