No abstract

the proximal part of the femur. Evaluation of strength was determined by the maximum shear stresses. So, in the acetabulum with a rotation of 25° forward and rotation of 35° back, the greatest value of maximum shear stress exceeds 1.7 MPa; at the rotation of more than 30° back, the value of similar stress exceeds 6.4 MPa; at forward rotation to 50°, the highest maximum shear stresses reach a value of 5.0 MPa. Thus, when the rotation back to the angle over 30°, maximum shear stresses in the joint region are into the lower critical value, at 35,° they are situated in the upper region of the critical values. When considering forward rotation angle over 25°, maximum shear stresses are into the lower region of the critical values, crossing through the upper region of the critical values at rotation to 50° does not occur.