Total Hip Arthroplasty Clinical Trial
Official title:
A Randomised Controlled Study Investigating the Effect of Patient Pelvic Positioning and Method of Acetabular Component Insertion on Acetabular Component Inclination During Total Hip Arthroplasty (THA).
Total Hip Arthroplasty (THA) is one of the most commonly performed orthopaedic operations
worldwide. The main aim is overall improvement in levels of patient pain and mobility. Such
surgery involves implantation of both an acetabular and femoral component. With the patient
in the lateral decubitus position, the Orthopaedic Surgeon assumes that the pelvis is in a
neutral position with respect to all three body planes at the time of acetabular component
implantation.
With regard to THA, the current orthopaedic literature demonstrates a clear relationship
between acetabular component positioning, polyethylene wear and risk of dislocation.
Problems with edge loading, stripe wear and squeaking are also associated with higher
acetabular inclination angles, particularly in hard-on-hard bearing implants.
The important parameters of acetabular component positioning are depth, height, version and
inclination.
Control of acetabular component inclination, particularly in the lateral decubitus position,
is difficult and remains a challenge for the Orthopaedic Surgeon.
Accurate implantation of the acetabular component within the 'safe zone' of radiological
inclination is dependent on:
- Operative version
- Operative inclination
- Pelvic position (Primarily, but not exclusively, abduction / adduction.)
This study aims to investigate the effect of patient pelvic positioning and method of
acetabular component insertion on acetabular component inclination during Total Hip
Arthroplasty (THA).
n/a
Allocation: Randomized, Intervention Model: Factorial Assignment, Masking: Single Blind (Outcomes Assessor)
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