Objectives: A tibial tubercle-trochlear groove (TT-TG) distance of 20 mm is typically used when determining whether tubercle anteromedialization (AMZ) needed for patellar instability. TT-TG distance, however, may depend on the internal/external (IE) rotation tibia in relation to femur, which not controlled for. Without knowledge variability an individual’s influenced by femorotibial rotation, u...

Objectives: The quadriceps angle (Q-angle) measures the force vector of pull extensor mechanism knee. A larger Q-angle is thought to be a predisposing factor for patellar dislocation, but previous literature has reported poor reliability and validity clinically measured Q-Angle. In response reliability, new “Standard Q-Angle” (SQA) was developed by Merchant et al. (Merchant 2020) in an attempt ...

CONTEXT Patellar dislocation usually occurs to the lateral side, leading to ruptures of the Medial Patellofemoral Ligament (MPFL) in about 90% of the cases. Even though several prognostic factors are identified for patellofemoral instability after patellar dislocation so far, the appropriate therapy remains a controversial issue. EVIDENCE ACQUISITION Authors searched the Medline library for s...

We read the article by Thaunat et al. using the recession edge trochleoplasty (RT) technique which was developed y our team, with interest. However, the indications for RT re different in the two articles. In our paper [1], RT is used n patellofemoral (PF) instability that has been stabilized, ut is still painful. In the article by Thaunat et al. RT is one f several procedures used to correct p...

BACKGROUND The purpose of the present study was to determine whether the image levels of the distal femur affected the measurement of the tibial tubercle-trochlear groove (TT-TG) distance. METHODS Thirty sets of computer tomography (CT) images and 30 sets of MR images of the knee were evaluated. The TT-TG distance was quantified at multiple image levels in 1.5-mm increments, covering the prox...

Background: The purpose of this study was to evaluate the significance of the Q angle with respect to the patella position. We assess the correlation between the Q angles (calculated by clinical exam) in different positions and CT indices (with more impression on TTTG) Method: A total number of 68 knee joints of 50 cases entered the study. Clinical examination was used to measure Q angle (in 3 ...