Observational studyKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2017
Patient-specific positioning guides for total knee arthroplasty: no significant difference between final component alignment and pre-operative digital plan except for tibial rotation.
Observational study in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
12 citing papers in PubMed, 1 synthesis or guideline pooled it, 19 citations in OpenAlex.
- 3D-printing techniques in a medical setting: a systematic literature review.Biomedical engineering online · 2016Pooled it
- Comparison of custom cutting guides based on three-dimensional computerized CT-scan planning and a conventional ancillary system based on two-dimensional planning in total knee arthroplasty: a randomized controlled trial.International orthopaedics · 2019Trial
- [Patient-specific instrumentation in total knee arthroplasty - current concepts and clinical implications].Orthopadie (Heidelberg, Germany) · 2025Article
- Muscle Activation and Mobility After Robotic Total Knee Arthroplasty: Insights from Early Postoperative Recovery.Journal of clinical medicine · 2025Article
- Applications and accuracy of 3D-printed surgical guides in traumatology and orthopaedic surgery: A systematic review and meta-analysis.Journal of experimental orthopaedics · 2024Article
- Sensitivity of Model-Based Predictions of Post-TKA Kinematic Behavior to Residual Errors in Ultrasound-Based Knee Collateral Ligament Strain Assessment.Sensors (Basel, Switzerland) · 2023Article
- Anatomical Engineering and 3D Printing for Surgery and Medical Devices: International Review and Future Exponential Innovations.BioMed research international · 2022Review
- Patient-Specific Instrumentation Accuracy Evaluated with 3D Virtual Models.Journal of clinical medicine · 2021Article
- Preliminary experience with an image-free handheld robot for total knee arthroplasty: 77 cases compared with a matched control group.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2020Article
- Patient-specific instrumentation in Oxford unicompartmental knee arthroplasty is reliable and accurate except for the tibial rotation.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2018Article
- Revision of partial knee to total knee arthroplasty with use of patient-specific instruments results in acceptable femoral rotation.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2018Article
- Patient-specific positioning guides do not consistently achieve the planned implant position in UKA.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2017Article
Corrections and comments
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Authors and funding
6 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeTo assess whether there is a significant difference between the alignment of the individual femoral and tibial components (in the frontal, sagittal and horizontal planes) as calculated pre-operatively (digital plan) and the actually achieved alignment in vivo obtained with the use of patient-specific positioning guides (PSPGs) for TKA. It was hypothesised that there would be no difference between post-op implant position and pre-op digital plan.
methodsTwenty-six patients were included in this non-inferiority trial. Software permitted matching of the pre-operative MRI scan (and therefore calculated prosthesis position) to a pre-operative CT scan and then to a post-operative full-leg CT scan to determine deviations from pre-op planning in all three anatomical planes.
resultsFor the femoral component, mean absolute deviations from planning were 1.8° (SD 1.3), 2.5° (SD 1.6) and 1.6° (SD 1.4) in the frontal, sagittal and transverse planes, respectively. For the tibial component, mean absolute deviations from planning were 1.7° (SD 1.2), 1.7° (SD 1.5) and 3.2° (SD 3.6) in the frontal, sagittal and transverse planes, respectively. Absolute mean deviation from planned mechanical axis was 1.9°. The a priori specified null hypothesis for equivalence testing: the difference from planning is >3 or <-3 was rejected for all comparisons except for the tibial transverse plane.
conclusionPSPG was able to adequately reproduce the pre-op plan in all planes, except for the tibial rotation in the transverse plane. Possible explanations for outliers are discussed and highlight the importance for adequate training surgeons before they start using PSPG in their day-by-day practise. LEVEL OF EVIDENCE: Prospective cohort study, Level II.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.