How are clinical outcomes related to the deviation severity of the tibiofemoral mechanical axis on coronal plane following knee arthroplasty?
Journal of Clinical Orthopaedics and Trauma, cilt.10, sa.1, ss.91-95, 2019 (Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 10 Sayı: 1
- Basım Tarihi: 2019
- Doi Numarası: 10.1016/j.jcot.2017.08.019
- Dergi Adı: Journal of Clinical Orthopaedics and Trauma
- Derginin Tarandığı İndeksler: Scopus
- Sayfa Sayıları: ss.91-95
- Anahtar Kelimeler: Arthroplasty, Clinical outcome, Knee, Malalignment, Mechanical axis
- Sağlık Bilimleri Üniversitesi Adresli: Evet
Özet
Objective: To analyze the effect of tibiofemoral mechanical axis (TFMA) deviation severity on clinical outcomes after total knee arthroplasty (TKA). Methods: We retrospectively reviewed the patients who underwent primary TKA between January 2002 and December 2010. After applying inclusion/exclusion criteria, we evaluated 70 knees of 51 patients. The mean ± SD follow-up period was 7.08 ± 1.34 years. The knees were divided into 3 groups based on TFMAs. The first group, identified as “well aligned,” included the TFMAs that were neutral within 3° (0° ± 3°) of alignment. The second group, identified as “outliers 1,” included the slightly deviated TFMAs (−3° to −6° valgus and +3° to +6° varus). The third group, identified as “outliers 2,” included the severely deviated TFMAs of more than 6° from neutral alignment (<−6° valgus and > + 6° varus). The clinical outcomes of each group were compared by evaluating the Oxford Knee Score (OKS), visual analog scale (VAS), and Short Form-36 physical component summary (SF-36 PCS) and mental component summary (SF-36 MCS) scores. Results: We found that OKS, SF-36 PCS, and SF-36 MCS were nearly the same in the well-aligned and outliers 1 groups but worse in the outliers 2 group. VAS scores were nearly the same in all groups. (p > 0.05) Conclusion: Function scores were impaired when the TFMA deviated more than 6° from neutral. However, the differences in clinical outcomes between well-aligned knees and those of outliers were not found to be statistically significant in the medium term.