Radiological Measurements in Patellofemoral Disorders

Beaconsfield, Tina; Pintore, Ernesto; Maffulli, Nicola; Petri, Giunfranco J.

doi:10.1097/00003086-199411000-00004

Cited by 130 publications

(83 citation statements)

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“…Skyline radiographs or mid-patellar section by CT/MRI have been used to describe the patellar position relative to the femoral condyles or intercondylar groove, at different angles of knee flexion and with different loading conditions (partial weight-bearing or non-weight-bearing, with or without quadriceps contraction) [2]. A few studies have used ultrasound scanning to investigate malalignment of the patella [13,20,28].…”

Section: Describing Tracking In Terms Of the Femoral Groovementioning

confidence: 99%

“…A few studies have used ultrasound scanning to investigate malalignment of the patella [13,20,28]. Many parameters have been mentioned in these imaging studies, with the following most popular ones: sulcus angle, describing the geometry of the femoral articular surface; Merchant's congruence angle, a measure of lateral displacement and tilt of the patella; lateral patellofemoral angle and lateral patellar tilt angle denote the patellar tilt; both lateral patellar displacement and the bisect offset describe lateral patellar displacement [2] ( Figure 1). The fact that most of these imaging studies were either done statically or without weight bearing is one of their disadvantages.…”

Section: Describing Tracking In Terms Of the Femoral Groovementioning

confidence: 99%

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Standardisation of the description of patellofemoral motion and comparison between different techniques

Bull

Katchburian

Shih

et al. 2002

Knee, Surg, Sports Traumatol, Arthrosc

100

114

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Patellofemoral motion is significant clinically, yet in the literature many different methods and terminologies are used, thus making comparison between papers difficult. The aim of this study was to review and explain the different methods used for the description of patellofemoral joint motion, compare these methods by experimentation, and propose a standardised method. We found three main methods for describing patellar motion: motion of the patella about femoral body fixed axes, about patellar body fixed axes, or a combination of these. Description about femoral body fixed axes does not make sense clinically. Description about patellar body fixed axes is straightforward, yet the definition of these axes is prone to error due to the lack of anatomical landmarks. The combination method makes most sense clinically and uses more easily found anatomical landmarks. Patellar flexion varied by up to 26% when describing the motion about different axes. Tilt and shift were highly sensitive to the choices of coordinate systems and the axes of motion. The pattern of rotation was consistent between all methods, however, differences between the methods increased with patellar flexion. We propose the description of patello-femoral motion in terms of shift (along a femoral medial-lateral axis), tilt (about the patellar long axis), rotation (about a floating patellar anterior-posterior axis) and flexion (about the femoral medial-lateral axis).

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Section: Describing Tracking In Terms Of the Femoral Groovementioning

confidence: 99%

Section: Describing Tracking In Terms Of the Femoral Groovementioning

confidence: 99%

Standardisation of the description of patellofemoral motion and comparison between different techniques

Bull

Katchburian

Shih

et al. 2002

Knee, Surg, Sports Traumatol, Arthrosc

100

114

View full text Add to dashboard Cite

show abstract

“…Evaluation of the patella or of patellar tracking abnormalities of the ossified knee can be performed using radiography [5], ki nematic CT [6], and kinematic MR imaging [7]. In the immature skeleton, cartilage can not be distinguished from adjacent soft tissue with CT.…”

Section: Discussionmentioning

confidence: 99%

Sonography of patellar abnormalities in children.

Miller

Shapiro²,

Schultz³

et al. 1998

American Journal of Roentgenology

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“…In skeletally mature patients, the anterior knee pain and the value of the TTTG distance #20 mm could imply surgical treatment [8], namely medialization of the tibial tuberosity [6]. The purpose of our study was to examine the association of the clinical J-sign with trochlear dysplasia and TTTG distance in patients with symptomatic patellofemoral instability.…”

Section: Introductionmentioning

confidence: 99%

Demystifying Tibial-Tuberosity Trochlear Groove Distance, the J-Sign and Trochlear Dysplasia: An Imaging Encomium

GL¹,

K²,

Gupta³

2017

J Med Diagn Meth

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Aims and objective: The purpose of our study was to examine the association of the clinical J-sign with trochlear dysplasia and TTTG distance in patients with symptomatic patellofemoral instability. Material and methods:After obtaining approval from the institutional review board (class: 8.1-16/47-2, Nr.: 02/21AG, April 11, 2017), in our retrospective cross-sectional review study, 2 raters mutually assessed the type of trochlear dysplasia and separately measured the TTTG distance at 4-week intervals using 2 methods (standard and by Nizi#) on static and dynamic CT-images of 55 knees (46 patients) with clinical record of J-sign and anterior knee pain.Statistical analysis: All reported P values were 2-tailed with a level of <0.05 indicating statistical significance. The associations between variables were analyzed with appropriate correlation coefficients (Pearson, rp, pointbiserial, rpb, and phi, r#). The Wilcoxon signed-rank test for paired samples was used to evaluate the differences between static and dynamic tibial tuberosity-trochlear groove. Conclusion:The clinical manifestation of the J-sign, considered a dynamic marker of patellofemoral instability, has been frequently associated with numerous conditions, such as trochlear dysplasia, higher values of the Q-angle, and lateralized tibial tuberosity, yet its fundamental cause remains unknown, and the diagnostic value uncertain.

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Radiological Measurements in Patellofemoral Disorders

Cited by 130 publications

References 0 publications

Standardisation of the description of patellofemoral motion and comparison between different techniques

Standardisation of the description of patellofemoral motion and comparison between different techniques

Sonography of patellar abnormalities in children.

Demystifying Tibial-Tuberosity Trochlear Groove Distance, the J-Sign and Trochlear Dysplasia: An Imaging Encomium

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