- Limb discrepancy causes patient dissatisfaction, pain, gait disturbance etc
- Postoperative goal is a final LLD of <1 cm
- Evaluate and document any structural and apparent limb-length discrepancy before total hip arthroplasty for later comparison
- Measurement of LLD on a preoperative anteroposterior pelvic radiograph is best performed using the inter-teardrop line and the femoral head center as the landmarks
- Hip position must be replicated accurately in all three planes before and after implantation of the prosthesis
- Intra-operative techniques: Shuck and drop-kick tests of soft-tissue tension, Palpation of distal anatomic references, Intra-operative instrument markings, Special calipers, Intra-operative digital imaging, Computer navigation, Robotic technologies
