ArticleJournal of orthopaedic surgery and research2020
A novel extramedullary technique to guide femoral bone preparation in mobile unicompartmental knee arthroplasty based on tibial cut and overall alignment.
Article in Journal of orthopaedic surgery and research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Modified extramedullary femoral referencing is associated with improved femorotibial component alignment consistency and more stable mobile-bearing positional behavior in Oxford medial unicompartmental knee arthroplasty: a retrospective cohort study.BMC musculoskeletal disorders · 2026Article
- Optimizing uni-compartmental knee arthroplasty: the impact of preoperative planning and arithmetic hip-knee-ankle angle.BMC musculoskeletal disorders · 2025Article
- Restoring coronal pre-arthritic alignment in mobile-bearing unicompartmental knee arthroplasty: mid- to long-term outcomes.BMC musculoskeletal disorders · 2025Article
- Varus/valgus angle of the femoral component relative to the tibial component increases risk of bearing dislocation in medial mobile bearing unicompartmental knee arthroplasty.BMC musculoskeletal disorders · 2025Article
- Minimally invasive small incision surgical technique for unicompartmental knee arthroplasty.International orthopaedics · 2023Article
- Article
- Gap balance difference of unicompartmental knee arthroplasty between hanging leg and supine leg position: a prospective cohort study.International orthopaedics · 2023Article
- Exploring the relationship between bearing extrusion and postoperative persistent pain in Oxford unicompartmental knee arthroplasty: A trajectory measurement study.Frontiers in bioengineering and biotechnology · 2022Article
- Evidence-based surgical technique for medial unicompartmental knee arthroplasty.Knee surgery & related research · 2021Review
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Authors and funding
7 authors.
Funding
Abstract
backgroundThe mobile Oxford unicompartmental knee arthroplasty (UKA) implant has been widely used with an intramedullary guide for femoral preparation. We modified the femoral guide technique based on the tibial cut first and spacer block technique. This study was performed to determine the radiographic accuracy and early clinical outcomes of the extramedullary method.
methodsWe retrospectively evaluated 50 consecutive patients who underwent UKA using the extramedullary technique. An equal number of patients who underwent UKA with the conventional technique were matched as the control group. Clinical outcomes were evaluated in terms of the operating time, blood loss, range of motion, and Hospital for Special Surgery score. Radiographic accuracy was evaluated by the implant position and alignment in the coronal and sagittal planes.
resultsThe mean follow-up period was 39.76 ± 5.77 months. There were no differences in the postoperative Hospital for Special Surgery score, range of motion, or hip-knee-ankle angle between the two groups. The operating time in the extramedullary group was shorter than that in the conventional group (54.78 ± 7.95 vs. 59.14 ± 10.91 min, respectively; p = 0.025). The drop in hemoglobin after 3 days was only 12.34 ± 4.98 g/L in the extramedullary group which was less than that in the conventional group (p = 0.001). No significant differences were found in the postoperative coronal and sagittal angles between the two groups. Acceptable radiographic accuracy of the implant alignment and position was achieved in 92% of patients in the extramedullary group and 96% of patients in the conventional group.
conclusionsThe radiographic and clinical results of the extramedullary technique were comparable with those of the conventional technique with the advantage of no intramedullary interruption, less blood loss, a shorter operating time, and more rapid recovery. As the technique depends on the accurate tibial cut and overall alignment, we do not recommend it to surgeons without high volume experiences.
trial registrationRetrospectively registered LEVEL OF EVIDENCE: IV, retrospective study.
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