The transverse acetabular ligament bridges the acetabular notch, converting it into a foramen through which the acetabular branch of the obturator artery and acetabular neurovascular structures pass. It completes the inferior acetabular rim.
Completes the inferior rim of the acetabulum, provides the inferior attachment for the acetabular labrum, and serves as the primary surgical landmark for acetabular cup position during total hip arthroplasty.
The transverse acetabular ligament is the most important intraoperative landmark for acetabular cup inclination — the cup should be positioned parallel to the TAL (approximately 40 degrees inclination in most patients). The ligamentum teres of the hip attaches to the TAL at its midpoint.
The TAL serves as the intraoperative reference for acetabular cup inclination in total hip arthroplasty — parallel cup placement to the ligament produces consistent and reproducible cup angles.
Transverse acetabular ligament injury in acetabular wall and column fractures affecting the inferior acetabular rim, assessed during ORIF planning for inferior stabilisation requirements.
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