Abstract
Protrusio acetabuli (PA) is characterized by superior and medial migration of the femoral head into the pelvis secondary to trauma or disease. Degenerative arthritis is a common sequelae of fatigue failure of the medial wall in PA hips, and total hip arthroplasty (THA) is the treatment of choice for optimal restoration of the centre of rotation (COR) and biomechanics of these hips. THA for PA poses specific technical challenges, viz. difficult exposure, difficult dislocation, specific reaming protocol, distalization and lateralization of the COR and optimal fixation of the socket. Meticulous pre-operative planning coupled with a step-by-step approach is the key to a successful outcome. The chief determinants include restoration of the acetabular bone stock and adequate lateralization and distalization of the COR of the native hip. The choice of fixation is either cemented or biological, depending upon the severity of the condition and the extent of acetabular bone loss. Protrusio support devices and anti-protrusio cages (APCs) may be required in extreme cases as they help bridge areas of severe bony deficiencies, allowing bone grafts to be incorporated. However, they are expensive and may sometimes not match the nature of the bony defect. Special reconstruction techniques, viz. acetabular distraction are needed in certain specific acetabular defects such as pelvic discontinuity.
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Elhence, A., Banerjee, S., Gupta, A. (2023). Total Hip Arthroplasty for Protrusio Acetabuli: Principles of Reconstruction and Technique. In: Sharma, M. (eds) Hip Arthroplasty. Springer, Singapore. https://doi.org/10.1007/978-981-99-5517-6_20
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DOI: https://doi.org/10.1007/978-981-99-5517-6_20
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