Is the Q-Angle an Absolute or a Variable Measure?

Wilson, Tony; Kitsell, Fleur

doi:10.1016/s0031-9406(05)61422-8

Cited by 27 publications

(20 citation statements)

References 34 publications

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“…This angle can be measured in the supine or standing position with the hip and knee extended and the quadriceps muscle relaxed. The Q-angle has been implicated as one of several factors in various knee disorders [3,15,22]. The Q-angle has been studied in Caucasian populations and normal reference values have been established.…”

Section: Introductionmentioning

confidence: 99%

Normal Q-angle in an Adult Nigerian Population

Omololu

Ogunlade²,

Gopaldasani³

2009

Clinical Orthopaedics &Amp; Related Research

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The Q-angle has been studied among the adult Caucasian population with the establishment of reference values. Scientists are beginning to accept the concept of different human races. Physical variability exists between various African ethnic groups and Caucasians as exemplified by differences in anatomic features such as a flat nose compared with a pointed nose, wide rather than narrow faces, and straight rather than curly hair. Therefore, we cannot assume the same Q-angle values will be applicable to Africans and Caucasians. We established a baseline reference value for normal Q-angles among asymptomatic Nigerian adults. The Q-angles of the left and right knees were measured using a goniometer in 477 Nigerian adults (354 males; 123 females) in the supine and standing positions. The mean Q-angles for men were 10.7°± 2.2°i n the supine position and 12.3°± 2.2°in the standing position in the right knee. The left knee Q-angles in men were 10.5°± 2.6°in the supine position and 11.7°± 2.8°i n the standing position. In women, the mean Q-angles for the right knee were 21°± 4.8°in the supine position and 22.8°± 4.7°in the standing position. The mean Q-angles for the left knee in women were 20.9°± 4.6°in the supine position and 22.7°± 4.6°in the standing position. We observed a difference in Q-angles in the supine and standing positions for all participants. The Q-angle in adult Nigerian men is comparable to that of adult Caucasian men, but the Q-angle of Nigerian women is greater than that of their Caucasian counterparts.

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Section: Introductionmentioning

confidence: 99%

Normal Q-angle in an Adult Nigerian Population

Omololu

Ogunlade²,

Gopaldasani³

2009

Clinical Orthopaedics &Amp; Related Research

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“…Since Insall and colleagues described the measure in its current form, there has been continued debate within the literature regarding normal values, subject positioning, contraction status of the quadriceps, and validity of the technique. 71,[73][74][75] The reliability of the Q-angle measurement technique has also been questioned. [75][76][77] The alignment of the femur and tibia is important because it affects patellar tracking, or the path the patella follows as it rides between the femoral condyles during knee flexion and extension.…”

Section: Quadriceps Anglementioning

confidence: 99%

The Basic Science of the Patella: Structure, Composition, and Function

2012

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The patella is the largest sesamoid bone in the body. The patellofemoral joint provides an integral articulating component of the extensor mechanism of the knee joint. A detailed description of patella anatomy, embryology and development, neurovascular anatomy, biomechanical function, and imaging modalities is provided in this article. Common patellar pathologies such as patellar instability, trochlear dysplasia, patella alta and baja, and patellofemoral joint arthritis as well as patellofemoral arthroplasty as a treatment option are also discussed. An understanding of the normal anatomy and biomechanics of the patella is a necessary prerequisite for understanding the pathogenesis of disorders involving the knee.

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“…When angle Q is above 15-20 degrees, it is considered that the knee joint causes deterioration of the extension mechanism and patella causes femoral pain with increasing tendency to slide laterally (3). It has been emphasized that it causes various pain and disability in abnormally low values (19).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Relationship Between Patellofemoral (Q) Angle Differences With Lower Extremity Performance in Young and Veteran Volleyball Players

Hazar

2019

Turkish Journal of Sport and Exercise

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This study was carried out to determine the relation between patella femoral (Q) angle differences and static equilibrium, flexibility and take-off force in young and veteran volleyball players. To the study 20 young males with an average age of 18 ± 00, 19 young females with a mean age of 18 ± 73, 21 veteran males with a mean age of 49 ± 04, 20 veteran females with a mean age of 48 ±70 who are registered players in Muğla Provincial Directorate of Youth and Sports, a total of 80 athletes voluntarily participated. The height, body weight, right and left leg Q angles in standing and laying, balance, flexibility and vertical takeoff measurements were performed in the research group respectively. The statistical evaluation of the obtained data was done in SPSS 21.00 package program on a personal computer. In the data with normal distribution, the parametric statistical methods were used. While the analysis of variance (ANOVA) test was used for intergroup comparisons, the Turkey test was used for multiple comparisons, and the correlation level was used to determine the relationship between the variables and the significance level was taken as p <0.05. According to the findings, there were significant differences between the Q angles, balance, flexibility, and take-off values of the participants (p <0.01). Also, there was a positive relationship between Q angle values and elasticity values in standing and laying position, and a negative relationship between balance and take-off force values (p <0.05).As a result: Q angle values of volleyball players were examined and it was seen that the difference between groups has resulted from gender; the difference between young and veteran volleyball players was not statistically significant. As the Q angle increased, the increase in the elasticity values and the decrease in the balance and splash values were determined. In this respect, Q angle differences are thought to be related to lower extremity performances of young and veteran volleyball players.

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Is the Q-Angle an Absolute or a Variable Measure?

Cited by 27 publications

References 34 publications

Normal Q-angle in an Adult Nigerian Population

Normal Q-angle in an Adult Nigerian Population

The Basic Science of the Patella: Structure, Composition, and Function

Investigation of the Relationship Between Patellofemoral (Q) Angle Differences With Lower Extremity Performance in Young and Veteran Volleyball Players

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