Umfang:
4
ISSN:
1745-3682
Inhalt:
Background and purpose — Unicompartmental knee arthroplasty (UKA) needs careful balancing of flexion/extension (F/E) gaps to prevent dislocation of the mobile meniscal bearing. Assessment of gaps is based on the surgeon’s subjective insertion force of a feeler gauge with different thicknesses and/or the lift-off of a trial meniscal bearing. However, the accuracy of this method remains unclear. We assessed the accuracy of the technique. Patients and methods — A consecutive series of 33 UKAs in 32 patients (mean age 64 years, 24 women) were balanced using the Oxford Phase III (OP III) Instrumentation. The recommended technique for F/E gap assessment was performed using different feeler gauges with 1-mm increments and the meniscal bearing lift-off tests according to surgical technique. A tensiometer was inserted and both gaps were maximally distracted by hand. Measurements in mm were recorded and analyzed with a reading of 90 N for both gaps in 20 and 90 degrees of flexion. Results — The gaps measured were 12 (11-18) mm in extension and 13 (11-18) mm in 90 degrees of flexion. The difference between the gaps was 0.4 (-0.5 to 1.0) mm (p 〈 0.001). There were no statistically significant gender differences regarding composite implant thickness, laxity, flexion gap, extension gap, or gap difference. Interpretation — OP III instrumentation using feeler gauges and the lift-off test provides accurate balancing of F/E gaps with an accuracy of less than 1 mm.
Anmerkung:
Gesehen am 26.11.2020
In:
Acta orthopaedica, London [u.a.] : Taylor & Francis Group, 2005, 84(2013), 4, Seite 406-409, 1745-3682
In:
volume:84
In:
year:2013
In:
number:4
In:
pages:406-409
In:
extent:4
Sprache:
Englisch
DOI:
10.3109/17453674.2013.813801
URL:
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