الفهرس 
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Abstract
Leg length discrepancy (LLD) has been well described as a common
complication following total hip arthroplasty (THA). The presence of LLD
has been associated with back pain, increased risk of nerve injury and
dislocation, poor patient satisfaction, and the need for revision surgery.
It has been cited as a major cause of litigation following THA. In the
literature, there is continuing debate about the importance of LLD and its
clinical effect.
Careful preoperative measurement and assessment, as well as
preoperative and postoperative patient education, are important factors in
achieving an acceptable result. However, after total hip arthroplasty, equal
leg length should not be guaranteed. Rather, the patient should be given a
realistic assessment of what can reasonably be expected.
Placement of the implants: restoration of the centre of rotation of the
hip joint is an important goal of THR to ensure normal gait and function.
Correct use and selection of implants can restore the biomechanics of the
hip with appropriate femoral offset and leg length.
Correction of limb length inequality (LLI) without compromising hip
stability remains one of the intraoperative challenges in THR. The
incidence is difficult to ascertain but evidence suggests that some
lengthening occurs in as many as 30% of patients following THR, due most
commonly to malpositioning of the femoral component, and less
commonly the acetabular component.
The objectives of total hip arthroplasty (THA) include pain relief,
improved mobility and stability of the hip, normal mechanics of the hip
joint, and, when possible, equality of leg length. In general, obtaining pain
relief and improving stability take precedence over restoring equal leg
Summary
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length. However, leg lengthening may be required to provide a stable hip
joint after reconstruction arthroplasty.
To prevent postoperative leg length discrepancy and its attendant
problems, it is important to understand the various components of leg
length assessment related to THA, including preoperative planning,
intraoperative measurement, and post-operative management. With
minimally invasive techniques and smaller incisions, the need for accurate
placement of implants is heightened.