Long patellar tendon: radiographic sign of patellofemoral pain syndrome--a prospective study.

Background Patellofemoral pain syndrome is the most common knee condition and is associated with patellar maltracking. Ultrasound is used in studying patellar maltracking. The objective is to determine if the technique which analyzes the displacement of the patellar tendon in the trochlear sulcus is associated with patellofemoral pain syndrome. Methods In total, 68 knees of 34 football players (males = 20, females = 14) were included. Patellar tendon displacement was assessed in supine and standing positions. Patellar tendon displacement difference in the two positions was determined. Results There was a significant difference in the lateral patellar tendon displacement during standing which was larger in patellofemoral pain syndrome than without patellofemoral pain syndrome (Mean Rank = 39.20 vs. 30.32, p = 0.02). There was no significant difference between the two groups for lateral patellar tendon displacement in supine and the difference in patellar tendon displacement from supine to standing. Conclusion The technique could be a potential method in assessing patellar maltracking. It could be used to have a comprehensive understanding of the pathomechanics and treatment of patellofemoral pain syndrome.

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Correlation of rearfoot angle to Q-angle in patellofemoral pain syndrome: a prospective study

International Journal of Research in Orthopaedics ◽

10.18203/issn.2455-4510.intjresorthop20172089 ◽

2017 ◽

Vol 3 (4) ◽

pp. 688 ◽

Cited By ~ 1

Author(s):

K.S. Dileep ◽

Krishna Harish ◽

Rameez P. Mohammed

Keyword(s):

Prospective Observational Study ◽

Pain Syndrome ◽

Patellofemoral Pain Syndrome ◽

Patellofemoral Pain ◽

Age Group ◽

Inclusion Criteria ◽

Pearson Product Moment Correlation ◽

Q Angle ◽

A Prospective Study ◽

Varus Angle

Background: Objective of the study was to evaluate the correlation between rearfoot posture to Q-angle in patients with patellofemoral pain syndrome.Methods: This is a two-year prospective observational study in which all patients with patellofemoral pain syndrome in the age group of 20-30 years were included in the study. The static Q-angle and the rearfoot angles of these subjects were measured and analyzed statistically for their correlation.Results: There were sixty patients who fulfilled the inclusion criteria of the study. Pearson product moment correlation showed 27% subjects having rearfoot valgus and 73% having rearfoot varus angle. T test showed statistically significant Q-angle for rearfoot varus compared to rearfoot valgus.Conclusions: Rearfoot varus is more commonly associated with patellofemoral pain syndrome. The Q-angle increases in both rearfoot varus and valgus but is significantly more in patients with rearfoot varus.

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In vivo Evaluation of Patellar Tendon Stiffness in Individuals with Patellofemoral Pain Syndrome

Applied Bionics and Biomechanics ◽

10.1155/2008/269891 ◽

2008 ◽

Vol 5 (2) ◽

pp. 59-63

Author(s):

Hsin-Yi Liu ◽

Michelle Boling ◽

Darin Padua ◽

R. Alexander Creighton ◽

Paul Weinhold

Keyword(s):

Patellar Tendon ◽

Pain Syndrome ◽

Patellofemoral Pain Syndrome ◽

Knee Extension ◽

Patellofemoral Pain ◽

Knee Extensors ◽

Ultrasonic Technique ◽

In Vivo Evaluation ◽

Tendon Stiffness

The objective of this study was to utilise an ultrasonic technique to assess the effect of patellofemoral pain syndrome (PFPS) on the mechanical properties of the patellar tendon. Seven subjects with PFPS and seven matched control subjects volunteered to participate in this study. Subjects were asked to perform isometric maximal voluntary contractions of the knee extensors while their knee extension torque was monitored and the displacement of the patellar tendon was recorded with an ultrasonic system. Our results showed significantly lower tendon stiffness (by ∼30%) in the PFPS subjects. Although tendon secant modulus was lower by 34% in the PFPS subjects, the difference was not statistically significant. Therefore, we conclude that the ultrasonic technique was able to detect a decrease in the structural stiffness of the patellar tendon associated with PFPS. The decrease in tendon stiffness was moderately correlated with the length of symptoms in these individuals.

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