Details

Autor(en) / Beteiligte

• Wang, Hai-Jun
• Song, Yi-Fan
• Ma, Yong
• Lin, Lin
• Wang, Jian
• Wang, Yong-Jian
• Liu, Yang
• Lu, Wei
• Wang, Fei
• Yu, Jia-Kuo

Titel

Higher pathologic threshold of increased tibial tuberosity–trochlear groove distance should be considered for taller patients

Ist Teil von

• Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2022-11, Vol.30 (11), p.3760-3766

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2022

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• Purpose The aim of this study was to evaluate the correlation between tibial tuberosity–trochlear groove distance (TT–TG) and body height or knee size, and to find height-related pathologic thresholds of increased TT–TG. Methods One-hundred and fifty-three patients with recurrent patellar instability and 151 controls were included. The TT–TG was measured on axial computed tomography (CT) images. Femora width and tibial width were selected to represent knee size. The correlation of TT–TG and gender, body height, femora width, and tibial width was evaluated. The height-related pathologic threshold of increased TT–TG was produced according to Dejour’s method. To combine TT–TG with body height and knee size, three new indexes were introduced, ratio of TT–TG to body height (RTH), ratio of TT–TG to femoral width (RTF), and ratio of TT–TG to tibial width (RTT). The ability to predict patellar instability was assessed by the receiver-operating characteristic (ROC) curve, odds ratios (ORs), sensitivity, and specificity. Results In patients with patellar instability, TT–TG showed significantly correlation with patient height, femoral width, and tibial width respectively (range r  = 0.266–0.283). This correlation was not found in the control group. The pathologic threshold of TT–TG was 18 mm in patients < 169 cm (53%), and the mean TT–TG was 21 mm in patients ≥ 169 cm (54%). There was significant difference in RTH, RTF, and RTT between the two groups. RTH, RTF and RTT have similar large area under the curve (AUC) with TT–TG. Conclusions TT–TG showed significant correlation with body height and knee size, respectively. The pathologic threshold of increased TT–TG was suggested to be 21 mm for patients ≥ 169 cm and 18 mm for patients < 169 cm. Body height-related pathologic threshold provided a supplement for indications of tibial tuberosity medialization. Level of evidence IV.