Trial reportOrthopadie (Heidelberg, Germany)2026
Improved accuracy of functional alignment restoration with robotic-assisted total knee arthroplasty : A quasi-randomized controlled trial.
Trial report in Orthopadie (Heidelberg, Germany), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 1 of them a synthesis that pooled it.
What it found
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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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
6 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Alignment strategy does not confer clinically meaningful advantages in medial pivot total knee arthroplasty: a systematic review and meta-analysis.Journal of orthopaedic surgery and research · 2026Pooled it
- Coronal plane alignment of the knee (CPAK) phenotypes and their relationship with gap patterns in robotic-assisted total knee arthroplasty: a clinical trial.Orthopadie (Heidelberg, Germany) · 2026Trial
- Beyond alignment accuracy: the need for standardized reporting in functional alignment TKA.Orthopadie (Heidelberg, Germany) · 2026Article
- Patellar resurfacing in primary total knee arthroplasty is associated with fewer reoperations but comparable clinical and functional outcomes: an umbrella review of meta-analyses.Arthroplasty (London, England) · 2026Review
- Bridging postural biomechanics and knee arthroplasty success.Arthroplasty (London, England) · 2026Review
- Variability of Visual Assessment in Determining Tibial Component Alignment in Total Ankle Arthroplasty.Foot & ankle orthopaedics · 2026Article
Corrections and comments
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
objectivesThis quasi-randomized controlled trial compared robotic-assisted and conventional total knee arthroplasty (TKA) in restoring patient-specific coronal alignment according to a functional alignment philosophy. Outcomes included preservation of the anatomical hip-knee-ankle angle (aHKA), mechanical axis deviation (MAD), and component positioning. Subgroup analyses assessed consistency in valgus and varus morphotypes. MATERIAL AND
methodsA single-blind parallel group quasi-RCT was conducted at the Department of Orthopedic Surgery, Eifelklinik St. Brigida, Germany (2021-2025). Patients underwent TKA following identical perioperative pathways. All procedures used a medial parapatellar approach and Smith & Nephew Legion Genesis II implants.
resultsA total of 692 patients were enrolled (346 robotic, 346 freehand). Baseline characteristics were comparable. Postoperative HKA was similar between groups, but the robotic group achieved a significantly smaller aHKA delta (2.58° vs 4.49°, p = 0.002). Robotic-assisted TKA preserved joint line alignment more consistently in valgus (2.63° vs 5.72°, p = 0.03) and varus knees (2.56° vs 4.22°, p = 0.004). The MAD control was improved, while differences n the mechanical lateral distal femoral angle (mLDFA) and mechanical medial proximal tibial angle (mMPTA) were not significant.
conclusionRobotic-assisted TKA enhanced accuracy in reproducing native joint line orientation, offering more consistent preservation of joint line obliquity in both valgus and varus morphotypes, thus supporting its role in personalized alignment strategies.
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