This misalignment can result in an error in the cup alignment, which can cause the above-mentioned consequences.
Reduced range of motion, prosthetic impingement, and joint dislocation can all result from misalignment of the acetabular component (i.e. cup alignment) in patients undergoing total hip arthroplasty.
Likewise, the so called "Pelvic Tilt" (PT), defined as the angle between this anterior pelvic plane and a vertical line in the standing position, has been reported to have a significant impact on the acetabular cup alignment values, and thereby the final functional anteversion in computer- assisted THA [ 28, 29].
In both groups, surgeons aimed for secure press-fit fixation, equal leg length, reconstruction of the preoperative hip offset, neutral stem alignment, cup inclination between 30 50° and cup anteversion between 10 30°.
A number of other general issues arose during the study concerning the use of any stereoscopic viewing technique for this task, namely cross talk, the marking of feature locations, such as the edge of the optic cup, and image alignment.
No differences could be seen between heads and cups regarding the alignment and the size of layers, scratches, smearings, and agglomerates.
No differences could be found between heads and cups regarding the alignment and the size of layers, scratches, smearings, and agglomerates, and no correlation was found between layers, scratches, smearings, or agglomerates and the in vivo orientation of the implants.
The parameters recorded were cup abduction angle and stem alignment.
These radiographs were evaluated independently by the same 2 senior orthopedic surgeons (JH and SB) for component position measured by leg-length difference, cup inclination angle, and stem alignment.
The period of protected weight bearing should take account of the surgeon's feel for cup stability and head seating, alignment and clearance of notching, and the patient's stability, comfort and safety.
But by the time the next World Cup came around, Larder's defensive alignment and the arrival of Jason Robinson had helped turn England into world champions.
