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Hess, Silvan; Fromm, Timo; Schiapparelli, Filippo; Moser, Lukas B.; Robertson, Emma; Amsler, Felix; Rasch, Helmut; Hirschmann, Michael T.

Change of tibial tuberosity-trochlear groove (TT-TG) distance during total knee arthroplasty had no influence on clinical outcome and anterior knee pain

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  • Medientyp: E-Artikel
  • Titel: Change of tibial tuberosity-trochlear groove (TT-TG) distance during total knee arthroplasty had no influence on clinical outcome and anterior knee pain
  • Beteiligte: Hess, Silvan; Fromm, Timo; Schiapparelli, Filippo; Moser, Lukas B.; Robertson, Emma; Amsler, Felix; Rasch, Helmut; Hirschmann, Michael T.
  • Erschienen: Springer Science and Business Media LLC, 2021
  • Erschienen in: International Orthopaedics
  • Sprache: Englisch
  • DOI: 10.1007/s00264-021-05074-6
  • ISSN: 0341-2695; 1432-5195
  • Schlagwörter: Orthopedics and Sports Medicine ; Surgery
  • Entstehung:
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  • Beschreibung: <jats:title>Abstract</jats:title><jats:sec> <jats:title>Purpose</jats:title> <jats:p>The main purpose of this study was to determine whether there is a correlation between the change of tibial tuberosity-trochlear groove (TT-TG) distance and clinical outcomes after total knee arthroplasty (TKA).</jats:p> </jats:sec><jats:sec> <jats:title>Methods</jats:title> <jats:p>A total of 52 knees undergoing TKA due to primary osteoarthritis were included in this retrospective study. All patients had pre- and postoperative CT scans. TT-TG distance was measured by two independent observers and the following alignment parameters were measured: hip-knee ankle angle (HKA), femoral mechanical angle (FMA), tibial mechanical angle (TMA), and posterior condylar angle (PCA). Clinical outcome was assessed using Knee Society Score (KSS) pre- and post-operatively and at a minimum of 12-month follow-up. Evidence of AKP was noted from follow-up reports. Pre- and postoperative scores were compared using a paired Student t-test. Pearson correlations were calculated to assess the influence of TT-TG on clinical outcome and of alignment parameters on the change in TT-TG. TT-TG between patients with and without AKP was compared using unpaired Student’s t-test (p &lt; 0.05).</jats:p> </jats:sec><jats:sec> <jats:title>Results</jats:title> <jats:p>Neither the absolute postoperative TT-TG nor the amount of change in TT-TG correlated with the post-operative KSS or the change in KSS. Post-operative TT-TG and change in TT-TG did not differ significantly between patients with and patients without AKP. Only the change in FMA showed a correlation with the change in TT-TG (p = 0.01, r = 0.36).</jats:p> </jats:sec><jats:sec> <jats:title>Conclusion</jats:title> <jats:p>Despite a missing correlation between outcomes and TT-TG distance in this study, excessive TT-TG distance should be avoided. Furthermore, surgeons need to be aware that changes in femoral joint line orientation might affect TT-TG distance.</jats:p> </jats:sec>