February 16, 2020
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Tibial tubercle more posteriorly positioned in patients with patellar cartilage lesions vs intact cartilage

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New data showed the tibial tubercle was more posteriorly positioned in patients with patellar cartilage lesions compared with patients with intact patellar cartilage.

Researchers retrospectively reviewed 17 patients who underwent patellofemoral cartilage restoration or repair procedures, 20 control patients who underwent partial meniscectomy with normal patellar cartilage and 15 patients with asymptomatic patellar chondrosis who underwent partial meniscectomy with patellar cartilage wear. Preoperative axial They used T2 MRI sequence to measure the sagittal tibial tubercle–trochlear groove (sTTTG) distance. The nadir of the anterior trochlear cartilage was the first point and the second point was the anterior tibial tubercle. Investigators compared the patient groups with analysis of variance testing with Bonferroni corrections.

Results showed patients who underwent patellofemoral cartilage restoration or repair procedures had a significantly more posterior mean sTTTG distance compared with control patients who underwent partial meniscectomy with normal patellar cartilage (5.9 mm vs. 0.8mm). Patients with asymptomatic patellar chondrosis had a mean value that fell between the other two groups; however, it was not significantly different (2.7 mm). Sulcus angle, Caton-Deschamps Index, TTTG or knee flexion angle on the MRI scan were not significantly different between the groups. – by Monica Jaramillo

Disclosures: Landsdown reports he receives fellowship-related educational support from Smith & Nephew and Arthrex Inc., and hospitality related payments from Tornier/Wright. Please see the full study for all other authors’ relevant financial disclosures.