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KMID : 0361620100450040287
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Journal of the Korean Orthopaedic Association
2010 Volume.45 No. 4 p.287 ~ p.292
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The Influence of Symtomless Degenerative Changes of the Patellofemoral Joint on Clinical Results of Medial Unicompartmental Knee Arthroplasty
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Kim Kyung-Tae
Kim Kwan-Soo
Kim Tae-Woo
Park Soon-Youl
Lee Song
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Abstract
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Purpose: To evaluate the influence of degenerative changes in the patellofemoral joint on the clinical results of medial unicompartmental knee arthroplasty (UKA).
Materials and Methods: Between January and December 2002, we operated on 180 cases of minimally invasive UKA using the Oxford® phase 3. Of the 180 cases, 156 were followed up for a minimum period of 5 years. Based on intraoperative degenerative findings of the patellofemoral joint, we classified cases into 4 groups (Group I-78 cases, Group II-40 cases, Group III-27 cases, Group IV-11 cases), and the clinical data were analyzed prospectively.
Results: During follow-up, which averaged 6 years and 2 months, the knee score, the knee function score, the range of knee motion and the tibiofemoral angle were improved significantly (p<0.05) in all groups. The preoperative knee score and the tibiofemoral angle in the mild degeneration group (I, II) were higher than in the severe degeneration group (III, IV) (p<0.05). On the other hand, there were no significant differences between the groups in the postoperative knee score, the knee function score, the range of knee motion and the tibiofemoral angle (p>0.05). To date, no complication or failure involving the patellofemoral joint has been observed.
Conclusion: Clinical results of UKA are satisfactory for all groups, and the severity of patellofemoral degeneration has no influence on clinical outcome. Symptomless degenerative arthritis of the patellofemoral joint is not a contraindication for medial UKA.
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KEYWORD
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knee joint, medial compartment, patellofemoral joint, degenerative arthritis, unicompartmental arthroplasty
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