ArticleArthroplasty (London, England)2026
Restricted kinematic alignment total knee arthroplasty using augmented reality technology to maintain limb alignment within targeted boundaries.
Article in Arthroplasty (London, England), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
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
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundAn augmented reality (AR)-aided navigation system that utilizes a standard smartphone enables accurate alignment of femoral and tibial components in total knee arthroplasty (TKA) and provides real-time intraoperative quantification of joint gaps. This study aimed to integrate the AR-aided navigation system into the surgical technique of restricted kinematic alignment and to evaluate its clinical effectiveness.
methodsWe compared 45 restricted kinematic alignment TKAs performed using posterior cruciate ligament (PCL) retaining medial-congruent prosthesis with an AR-aided navigation system and 40 mechanically aligned TKAs performed using PCL resecting posterior-stabilized prosthesis in patients with preoperative varus or neutral lower limb alignment. In the restricted kinematic alignment group, femoral and tibial alignments were determined using calipered and soft tissue-guided techniques, respectively, with the AR-aided navigation system providing real-time confirmation that angular values remained within safe boundaries. The target intraoperative extension gap was a rectangular configuration with equal medial and lateral widths.
resultsIntraoperative measured value of the soft-tissue imbalance with the knee in extension was significantly smaller in the restricted kinematic alignment group than in the mechanical alignment group (1.1 ± 1.1° vs 2.5 ± 2.2°; 95% CI, 0.7 to 2.2°; P < 0.001; Cohen's d = 0.85). After propensity score matching, no significant differences were observed between the groups in either the timed up-and-go test or the 10-m walk test at 1 week postoperatively (12.6 ± 3.5 s vs 13.2 ± 5.3 s; 95% CI, - 3.0 to 1.7; P = 0.60; and 11.7 ± 2.5 s vs 11.9 ± 3.2 s; 95% CI, - 1.7 to 1.3; P = 0.82, respectively).
conclusionsRestricted kinematic alignment TKA using PCL retaining medial-congruent prosthesis achieved more balanced intraoperative soft-tissue tension than the mechanical alignment TKA using posterior-stabilized prosthesis. However, early postoperative walking speed did not differ between the two groups.
Indexed as
Identifiers
What OpenQuestion holds
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.