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Strength analysis of human patella

100%

Kozień M. S. , Lorkowski J. , Pałka W.

2006

tom Vol. 26, no. 3

77-83

Forces generatead by leg muscles produce an external loading on the human patella, creating stresses in the patella. From the standpoint of strength of materials, values of the equivalent stress provide information about the potential damage occurrence, indicating the most vulnerable regions. The present analysis, supported by the final element package Ansys for static conditions, yields the stress distribution maps. The maximaI values reported in medical cases are provided for the sake of comparison. In the future, the model can support selection of the appropriate therapy of patella fractures.

The effect of proprioceptive training in patients with recurrent dislocation of the patella

100%

Vengust R. , Strojnik V. , Pavlovcic V. , Antolic V. , Zupanc O.

tom 07

nr 2

Eleven patients with recurrent dislocation of the patella were subjected to knee proprioceptive training. Patients exhibited a gain in their Lysholm and Activity scores (p 0.03 and 0.009). No patient needed operative procedure.

Movement of the lower leg and patella - dynamic model

84%

Jurkojć J. , Tejszerska D.

tom z. 19

81-86

The 2D model of human knee is presented in this paper. The anterior and posterior cruciate ligaments, medial and lateral collateral ligaments, patellar ligament and the most important muscles causing movement of lower leg relatively to femur are taken into account. Model enables determination of muscular forces, forces in ligaments, forces between tibia and femur and between patella and femur.

W pracy przedstawiony został dwuwymiarowy model kolana. Uwzględnione zostały więzadła krzyżowe, poboczne, więzadło rzepki i najważniejsze dla ruchu podudzia względem uda mięśnie. Model umożliwia wyznaczenie sił mięśniowych, sił w więzadłach oraz sił reakcji pomiędzy podudziem i udem oraz pomiędzy rzepką i udem.

Model of the total knee joint replacement

84%

Kren J. , Pokorny J. , Koudela K.

tom z. 8

81--84

The biomechanical investigation of the knee joint is essential in understanding the joint function and interaction of various components in both intact and perturbed condition. The model of the knee joint with total knee replacement is based on the finite element method. The attention of the present study has been focused on the patellofemoral joint and the patella tracking with different Q-angle and condylar twist angle.

Biomechanické studie kolenního kloubu jsou důležité pro porozumnění funkce kloubu a vzájemného působení jednotlivých komponent poškozeného i zdravého kloubu. Kolenní kloub je jeden z nejsložitějších kloubů v lidském těle. Model kolene s totální kolenní náhradou je založen na metodě konečných prvků. Pozornost v této studii je věnována patelo-femorálnímu kloubnímu spojení a pohybu čéšky pro rozdílné Q-úhly a "kondylar twist" úhly. Rozložení tlaku v náhradě kolenního kloubu je prezentováno na konci článku.

Radiological evaluation of the quadriceps angle (Q angle) in German Shepherd dogs

84%

Lojszczyk-Szczepaniak A. , Silmanowicz P. , Balicki I.

tom 70

nr 01

The research was conducted on a selected group of 65 healthy German Shepherd Dogs to determine Q angle values. The animals were tranquilized, positioned in ventrodorsal recumbency, and examined radiologically. The radiographs were converted into digital form and analyzed by specialized software to determine the lines and to make measurements. The Q angle assessment was based on the determination of two lines according to Kaiser and Miles in previous research. The first line was drawn from the cranial lip of the acetabulum of the hip joint to the centre of the femoral intercondylar notch. The second line was drawn from the femoral intercondylar notch to the tibial tuberosity. The angle between these two lines was the Q angle. The results were statistically analyzed, and basic statistical parameters were calculated, such as statistical mean (Me), standard deviation (SD), as well as minimum (Min) and maximum (Max) values. In our study the mean of the results was 17 with a standard deviation of 7.38. These results are are in agreement with the results of studies carried out on foxes, which suggests that the selection of patients of the same breed, size and similar body weight does not significantly reduce the standard deviation in determining the reference values. The differences between the right and left hind limbs were also observed in our study.