What Components Comprise the Measurement of the Tibial Tuberosity-Trochlear Groove Distance in a Patellar Dislocation Population?

Tensho, Keiji; Akaoka, Yusuke; Shimodaira, Hiroki; Takanashi, Seiji; Ikegami, Shota; Kato, Hiroyuki; Saito, Naoto

doi:10.2106/jbjs.n.01313

Cited by 69 publications

(87 citation statements)

References 36 publications

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“…In the present study, LPD decreased as the TT–TG distance decreased. The decrease in LPD represents the medial shift of the patella, and the TT–TG distance represents the tibial internal rotation. The present study found a significant correlation between ΔTT–TG distance and ΔLPD, which suggests that the patellar medial–lateral displacement was affected by the tibial tubercle displacement.…”

Section: Discussionsupporting

confidence: 51%

Relationship between Patellar Tracking and the “Screw‐home” Mechanism of Tibiofemoral Joint

Zhang

Wang

Niu

et al. 2016

Orthopaedic Surgery

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Section: Discussionsupporting

confidence: 51%

Relationship between Patellar Tracking and the “Screw‐home” Mechanism of Tibiofemoral Joint

Zhang

Wang

Niu

et al. 2016

Orthopaedic Surgery

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“…However, we found knee rotation was consistently high in Korean knees. Tensho et al30) observed a similar finding of knee rotation in Japanese knees. We believe that data from multiple centers on the normal and cut-off values may help to build a database that would serve as a guidance for better diagnosis and treatment particularly for Asian patients.…”

Section: Discussionmentioning

confidence: 61%

“…It is, however, clear that Asian knees differ from those of their Western counterpart22–24). Table 6 shows the comparison of values of various parameters between the established literature based on Western population and the current study8,12,13,25–30). The table further stresses the need to have a local database for diagnosis and treatment purposes as most variables are shown to differ between Asian and Western knees.…”

Section: Discussionmentioning

confidence: 75%

Comparison of Radiological Parameters between Normal and Patellar Dislocation Groups in Korean Population: A Rotational Profile CT-Based Study

Prakash

Seon

Woo

et al. 2016

Knee Surg Relat Res

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PurposePatellofemoral instability is a common cause of anterior knee pain in adolescents and young adults. Most normal and pathological values for diagnosing patellofemoral instability are based on Western literature. We conducted this radiological study to determine normal values for different patellofemoral parameters in a Korean population and to evaluate their usefulness in diagnosis.Materials and MethodsWe retrospectively reviewed the rotational profile computerized tomography (CT) scans of the patellar dislocation and control groups. Trochlear, patellar, rotational profile, and trochleo-patellar alignment parameters were compared between the groups. Receiver operating characteristic curves were drawn for significant parameters, and sensitivity and specificity were calculated for the cut-off values.ResultsThere were 48 patients in the patellar dislocation group and 87 patients in the control group. In the control group and patellar dislocation group, the mean sulcus angle was 132.5° and 143.3°, respectively, trochlear depth was 6.04 mm and 3.6 mm, bisect offset was 56.4% and 99.9%, lateral patellar tilting was 9.8° and 19.2°, patellar facet asymmetry was 63.5% and 45.16%, and the tibial tuberosity-trochlear groove (TT-TG) distance was 10.91 mm and 27.16 mm, respectively.ConclusionsThe trochlear depth, bisect offset, patella tilting, and TT-TG distance were parameters that significantly contributed to patellar instability. Rotational profile CT can be considered a good diagnostic tool to assess all these parameters that help to identify anatomical aberration resulting in patellofemoral instability, thereby helping in formulating the most effective treatment plan.

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“…3,4 Two studies based on CT scans of subjects showed trends for the TT-TG distance to be largest for subjects with the largest tibial external rotation. 7,16 Decreased tibial external rotation for MRI scans likely contributes to up to 4 mm smaller TT-TG distance values noted for MRI scans than CT scans. [6][7][8][9] Knee coils used for MRI scans induce knee flexion, 6,17 thereby reducing tibial external rotation associated with terminal knee extension.…”

Section: Discussionmentioning

confidence: 99%

Variations in Tibial Tuberosity to Trochlear Groove and Posterior Cruciate Ligament Distances due to Tibial External and Valgus Rotations

et al. 2017

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Tibial rotations with respect to the femur influence measurements used to assess the lateral position of the tibial tuberosity. This study utilized computational modeling to quantify how the tibial tuberosity to trochlear groove (TT-TG) and tibial tuberosity to posterior cruciate ligament attachment (TT-PCL) distances vary with tibial internal/external and varus/valgus rotations. Computational models were developed from magnetic resonance imaging data to represent eight knees with patellar instability. TT-TG and TT-PCL distances were quantified from the computational models for a neutral orientation and with the tibia rotated internally and externally and into varus and valgus in 1-degree increments to 5 degrees. Regression analyses related tibial rotations to TT-TG and TT-PCL distances. TT-TG distance increased with tibial external rotation, and both TT-TG and TT-PCL distances increased with valgus orientation ( > 0.94 for all regressions). The average increase in TT-TG distance for each 1 degree of tibial external rotation was 0.55 mm (range: 0.50-0.62 mm), compared with 0.00 mm (range: -0.05 to 0.04 mm) for TT-PCL distance. The average increase in TT-TG distance for each 1 degree of valgus was 1.01 mm (range: 0.91-1.14 mm), compared with 0.46 mm (range: 0.32-0.60 mm) for TT-PCL distance. TT-TG distance varies more with tibial rotations than TT-PCL distance due to both points being on the tibia and a smaller proximal-distal distance between the points for TT-PCL distance.

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What Components Comprise the Measurement of the Tibial Tuberosity-Trochlear Groove Distance in a Patellar Dislocation Population?

Abstract: Surgical decisions of tibial tubercle transfer should be made after the careful analysis of several underlying factors of patellar dislocation.

Cited by 69 publications

References 36 publications

Relationship between Patellar Tracking and the “Screw‐home” Mechanism of Tibiofemoral Joint

Relationship between Patellar Tracking and the “Screw‐home” Mechanism of Tibiofemoral Joint

Comparison of Radiological Parameters between Normal and Patellar Dislocation Groups in Korean Population: A Rotational Profile CT-Based Study

Variations in Tibial Tuberosity to Trochlear Groove and Posterior Cruciate Ligament Distances due to Tibial External and Valgus Rotations

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