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- Title
Unicompartmental knee arthroplasty fails to completely restore normal gait patterns during level walking.
- Authors
Kim, Myung-Ku; Yoon, Jung-Ro; Yang, Se-Hyun; Shin, Young-Soo
- Abstract
<bold>Purpose: </bold>Gait analysis is a valuable instrument for measuring function objectively after unicompartmental knee arthroplasty (UKA). However, most gait analysis studies have reported conflicting results for functional assessment after UKA. This meta-analysis compared the gait patterns of UKA patients and healthy controls during level walking.<bold>Methods: </bold>Studies were included in the meta-analysis if they recorded vertical ground reaction force (GRF), flexion at initial contact, flexion at loading response, extension at mid-stance, flexion at swing, walking speed, cadence, and stride length in UKA patients or healthy controls.<bold>Results: </bold>Seven studies met the criteria for inclusion in the meta-analysis. The UKA patients and healthy controls were similar in terms of vertical GRF (95% CI - 0.54 to 0.23; ns), flexion at initial contact (95% CI - 0.47 to 4.96; ns), flexion at loading response (95% CI - 1.29 to 3.69; ns), and flexion at swing (95% CI - 8.85 to 0.40; ns). In contrast, extension at mid-stance (95% CI 0.53 to 4.88; P = 0.01), walking speed (95% CI - 2.13 to - 0.15; P = 0.02), cadence (95% CI - 1.02 to - 0.25; P = 0.001), and stride length (95% CI - 2.02 to - 0.22; P = 0.01) differed significantly between groups. Subgroup analyses revealed that the pooled data were similar between groups: 1st maximum (heel strike), - 0.43 BW (ns); 1st minimum (mid-stance), 0.61 BW (ns); and 2nd maximum (toe off), - 0.46 BW (ns).<bold>Conclusions: </bold>There were no significant differences in vertical GRF or overall kinematics in the sagittal plane between UKA patients and healthy controls during level walking. However, the UKA group had a significantly slower walking speed and cadence and a shorter stride length than healthy controls. The current findings suggest that, clinically, UKA fails to completely restore normal gait patterns.<bold>Level Of Evidence: </bold>Level II, therapeutic study.
- Subjects
GAIT disorders; KNEE surgery; GROUND reaction forces (Biomechanics); ANATOMICAL planes; PATIENTS; COMPARATIVE studies; GAIT in humans; KINEMATICS; KNEE; RESEARCH methodology; MEDICAL cooperation; META-analysis; RESEARCH; TOTAL knee replacement; WALKING; EVALUATION research; PHYSIOLOGY
- Publication
Knee Surgery, Sports Traumatology, Arthroscopy, 2018, Vol 26, Issue 11, p3280
- ISSN
0942-2056
- Publication type
journal article
- DOI
10.1007/s00167-018-4863-0