High-Yield Summary Constrained liners are primarily indicated in revision total hip arthroplasty (THA) for recurrent instability when soft tissue and bony constraints are insufficient. Proper patient selection and understanding implant design limitations are critical to minimize mechanical failure and optimize stability. The choice between constrained liners, dual mobilityand other options depends on the degree of […]
High-Yield Summary Infected total knee arthroplasty (TKA) requires prompt, accurate diagnosis and tailored surgical management to optimize eradication and functional outcomes. One-stage exchange offers comparable infection control with fewer surgeries and faster recovery but demands strict patient selection and microbiological certainty. Two-stage exchange remains the gold standard for complex infections, resistant organismsor compromised hosts, balancing […]
High-Yield Summary The Anderson Orthopaedic Research Institute (AORI) classification stratifies bone defects in revision total knee arthroplasty (TKA) by location and severity, guiding reconstruction strategy. Type 1 defects involve intact metaphyseal bone; Type 2 defects have damaged metaphyseal bone but intact collateral ligaments; Type 3 defects include severe bone loss compromising ligamentous stability. Accurate defect […]
High-Yield Summary Trunnionosis is a corrosion and wear phenomenon at the femoral head-neck junction, leading to adverse local tissue reactions and implant failure. Diagnosis hinges on clinical suspicion in patients with unexplained pain post-THA, supported by serum metal ion levels and advanced imaging. Management requires a nuanced decision between isolated head and liner exchange versus […]
High-Yield Summary Robotic-assisted total knee arthroplasty (RA-TKA) enhances precision in bone resection and implant positioning, reducing alignment outliers compared to conventional techniques. Improved soft tissue balancing and kinematic alignment with RA-TKA correlate with better early functional outcomes and patient satisfaction. RA-TKA may reduce intraoperative complications such as ligament injury and improve reproducibility in complex deformities […]
High-Yield Summary Chronic pelvic dissociation in revision total hip arthroplasty (THA) represents a complex failure of pelvic continuity, often involving severe acetabular bone loss and instability that mandates advanced reconstructive strategies. Accurate classification of pelvic discontinuity guides surgical planning; the Paprosky and AAOS systems remain critical for assessing bone loss and discontinuity extent. Surgical management […]
High-Yield Summary The Ranawat Classification stratifies valgus knee deformities into three types based on severity, soft tissue status, and bone loss, directly guiding surgical strategy in total knee arthroplasty (TKA). Type I involves mild valgus deformity (<10°) with intact medial soft tissues; Type II shows moderate valgus (10°-20°) with attenuated medial structures; Type III presents […]
High-Yield Summary Massive bone loss in revision total knee arthroplasty (TKA) compromises implant fixation and joint stability, necessitating metaphyseal fixation strategies such as sleeves and cones. Metaphyseal sleeves provide press-fit fixation with biological ongrowth, ideal for contained defects with good host bone; cones offer structural support for uncontained, cavitary defects with severe bone loss. Accurate […]
High-Yield Summary Leg length discrepancy (LLD) after total hip arthroplasty (THA) is a leading cause of patient dissatisfaction, gait abnormalities, and potential litigation. Accurate preoperative templating and intraoperative measurement techniques are essential to minimize LLD. Understanding pelvic and femoral anatomy, biomechanics, and implant positioning directly influences leg length restoration. Surgical approach and implant choice must […]
High-Yield Summary Dual-mobility (DM) constructs combine a small femoral head articulating within a large polyethylene liner that moves within a metal acetabular shell, enhancing stability and reducing dislocation risk in primary and revision total hip arthroplasty (THA). DM implants are particularly advantageous in patients at high risk for instability: elderly, neuromuscular disorders, revision cases, and […]
Last Updated on January 25, 2026 by Christian Veillette
