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Archives of Orthopaedic and Trauma Surgery

, Volume 117, Issue 1–2, pp 53–57 | Cite as

Time-dependent clinical and roentgenographical results of Coventry high tibial valgisation osteotomy

  • D. Bettin
  • A. Karbowski
  • L. Schwering
  • H. H. Matthiaß
Original Article

Abstract

We analyzed the time-dependent results after Coventry osteotomy in 118 patients (129 cases) with unicompartmental osteoarthrosis of the knee. The median follow-up was 11.6 years (range 0.7–17 years). Data were noted according to the time since surgery. Group I (> 2 years) consisted of all 129 cases, group II (> 4 years) of 41 cases and group III (> 8 years) of 15 cases. The HSS knee score (mat. 100 points) improved from 33.2 ± 20.4 (range 17–60) to 68.3 ± 25.3 (range 30–90) in group I, to 54.7 ± 18.9 (range 29–90) in group 11 and to 43.7 ± 20.9 (range 23–85) in group III. The improvement started 4.6 ±7.8 months (range 0–60 months) after the operation and persisted for 4 years ± 37.4 months (range 0–125 months). The functional knee score (max. 100 points) changed from 61.7 ± 14.1 (range 41–70) to 71.7 ± 13.1 (range 53–87) in group I, to 70.0 ± 11.8 (range 54–88) in group II and to 64.2 ± 8.0 (range 42–90) in group III. The initial loss in knee flexion was 5.6° (range 0°–20°) and for extension 1.0° (range −5°–-25°). Anteroposterior ligament stability (max. 10 points) decreased from 9.2 ± 2.1 (range 2–10) to 5.6 ± 1.7 (range 2–9) in group III. Lateral ligament stability (max. 15 points) was relatively constant, from 12.6 ± 1.9 (range 4–15) to 9.7 ± 1.9 (range 2–14). Complications included one tibia fracture, one infection, six peroneus pareses, four haematomas and one pseudarthrosis. The mechanical axis was corrected to an average knee valgus of 5.2° ± 7.4°, which deteriorated over time. Radiographic evidence of arthrosis appeared independent of the operation.

Keywords

Knee Flexion Mechanical Axis Radiographic Evidence Tibia Fracture Knee Score 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1998

Authors and Affiliations

  • D. Bettin
    • 1
  • A. Karbowski
    • 1
  • L. Schwering
    • 1
  • H. H. Matthiaß
    • 1
  1. 1.Department of Orthopedic SurgeryWestfälische Wilhelms Universität MünsterMünsterGermany

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