Biomechanics of the Patellofemoral Joint

Hungerford, David S.; Barry, Maureen

doi:10.1097/00003086-197910000-00003

Cited by 216 publications

(191 citation statements)

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“…It has been shown in previous studies that the maximal three point bending stress occurs around 45 of flexion. 9 Thus with the knee locked in 45 of flexion, the quadriceps tendon was tensioned increasingly with the MTS device until failure occurred. The force was recorded from the testing machine at the time of failure.…”

Section: Load To Failure Testmentioning

confidence: 99%

Comparison of cannulated screws with FiberWire or stainless steel wire for patella fracture fixation: A pilot study

Bryant

Anderson

Stevens

et al. 2015

Journal of Orthopaedics

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Patella Fracture Fixation a b s t r a c tPurpose: This pilot study tested whether FiberWire provides similar protection to steel wire against repair displacement in patella fractures.Methods: Thirteen cadaver knees were cyclically loaded with 10 cycles (0e90 flexion) and fracture displacement was recorded. Fixation methods were also tested in load to failure (>3 mm displacement).Results: There was no difference between wire types in fracture displacement (1.4 mm AE 0.33 mm vs 1.2 mm AE 0.34 mm, respectively; p ¼ 0.418) or in the load to failure (714.7 N AE 110.9 N vs 744.5 N AE 92.8 N, respectively; p ¼ 0.360).

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Section: Load To Failure Testmentioning

confidence: 99%

Comparison of cannulated screws with FiberWire or stainless steel wire for patella fracture fixation: A pilot study

Bryant

Anderson

Stevens

et al. 2015

Journal of Orthopaedics

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“…Since then there have been numerous reports based on clinical (Table l), biomechanical (Hungerford & Barry 1979, Kaufer & Arbov 1971, Kaufer 1979) and animal (Bruce & Walmsley 1942, DePalma & Flynn 1958, Garr et al 1973) studies, the majority of which have indicated that the patella is important for normal function of the knee joint. As a result of this, the popularity of patellectomy has decreased.…”

Section: Patellectomy -A 20-year Follow-upmentioning

confidence: 99%

Patellectomy—a 20-year follow-up

Jakobsen

Christensen

Rasmussen

1985

Acta Orthopaedica Scandinavica

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“…Our data showed that anterior translation of the superior and centroid points was demonstrated in early flexion. The healthy patella lies proximal to the trochlea at knee extension, enters the trochlear groove as flexion proceeds and translates along the nearly circular arc formed by the patellofemoral groove in the sagittal plane [26,27]. This patellar movement is guided by multiple factors, including the geometry of the trochlear groove, the relative position of the femur with respect to the tibia, contractions of quadriceps muscles and patellar tendon constraints [9,21,22].…”

Section: Discussionmentioning

confidence: 99%

Physiological sagittal plane patellar kinematics during dynamic deep knee flexion

Hamai

Dunbar

Morooka

et al. 2013

International Orthopaedics (SICOT)

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Purpose Lateral radiographic views can be easily taken and have reveal considerable information about the patella. The purpose of this study was to obtain sagittal plane patellar kinematics data through the entire range of knee flexion under weight-bearing conditions. Methods Patellar flexion angles relative to the femur and tibia and anterior-posterior and proximal-distal translations of the patella relative to the femur and tibia were measured from 0 to 165°knee flexion in nine healthy knees using dynamic radiographic images. Results The patella flexed relative to the femur and tibia by two thirds times and one third times the knee flexion angle, respectively. The patella translated in an arc relative to the femur and tibia as the knee flexed. In early flexion, the superior and centroid points translated anteriorly and then the patella translated posteriorly relative to the femur. All three points of the patella translated posteriorly relative to the tibia during a full range of flexion. An average of four and three millimetres proximal patellar translation relative to the tibia was demonstrated from 0 to 20°and 140 to 160°knee flexion, respectively.Conclusions Physiological sagittal plane patellar kinematics, including patellar flexion angles and translations relative to the femur and tibia, showed generally similar patterns for each subject. Measurements of dynamic radiographic images under weight-bearing activities may enhance the opportunity to identify patellar pathological conditions.

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Biomechanics of the Patellofemoral Joint

Cited by 216 publications

References 0 publications

Comparison of cannulated screws with FiberWire or stainless steel wire for patella fracture fixation: A pilot study

Comparison of cannulated screws with FiberWire or stainless steel wire for patella fracture fixation: A pilot study

Patellectomy—a 20-year follow-up

Physiological sagittal plane patellar kinematics during dynamic deep knee flexion

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