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Unlike conventional assessments, it simulates high-risk flexion, adduction, and rotation patterns to stress resistance to dislocation. The technique uses standard exposure with trial components, performs controlled abduction to 30–40° followed by a forceful drop into a sterile pouch, and then checks for dislocation or subluxation. 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Unlike conventional assessments, the FDLT rigorously assesses the hip’s resistance to dislocation by simulating high-risk movements—ensuring stability during the most extreme of movement. This technique fills a vital gap in surgical practice by enabling the real-time optimization of implant positioning and component selection to prevent post-operative instability.  \nAbstract  \nIntroduction: Prosthetic instability remains a major challenge in total hip replacement (THR), which can result in dislocation, reduced mobility, and prosthetic loosening, requiring revision surgery. The forced drop leg test (FDLT) introducesaproactive approach by assessinghip stability under forced flexion, adduction, and rotation mimickingreal-world dislocationmechanisms.  \nTechnique: Standard exposure and trial implants are utilized to evaluate fit and alignment. With the trial components in place, the leg is abducted to 30–40°, then forcefully dropped into a sterile pouch in front. The hip joint is subsequently examined for dislocation or subluxation. Incaseofany dislocation or subluxation, reassessment of the component size and position is necessary.  \nConclusion: Preliminary evidence suggests that FDLT enhances existing stability checks, although broader clinical validation and protocol standardization are necessary to confirm its effectiveness.  \nKeywords: Totalhip replacement, intraoperative stability, hip dislocation, forced drop leg test.  \nIntroduction  \nTotal hip replacement ( THR) success hinges on the intraoperative stability of the artificial hip. The post-operative dislocation rates range from \u003C1% to 22%[1, 2, 3, 4, 5, 6, 7, 8], with most occurring within 3 months [9, 10, 11, 12] . Posterior dislocation, often triggered by forced flexion-adductionrotation, dominates these cases. Current stability tests fail to replicate the dynamic forces behind dislocations, highlighting the need for innovations such asthe forced drop leg test (FDLT). By rigorously evaluating high-risk positions, FDLT can help ensureprosthetic stability.  \nSurgical Technique fortheFDLT  \n1. Hip exposure and implant placement  \nStandard exposure and trial implants are utilized to evaluate fit and alignment.  \nStability tests are done to look for potential impingement. The acetabular component maybe fixed during this phase of surgery. Trial femoral head and stem are used before final fixation.  \n2. Leg positioning  \nThe surgeon meticulously ensures that the femoral head moves freely within the acetabulum without undue restriction from the  \n\n| \u003Cbr>Access this article online\u003Cbr>\u003Cbr>Website: [www.jocr.co.in](www.jocr.co.in)\u003Cbr>\u003Cbr>DOI:\u003Cbr>[https://doi.org/10.13107/jocr.2025.v15.i12.6532](https://doi.org/10.13107/jocr.2025.v15.i12.6532) | Author’s Photo Gallery |  |  |\n| --- | --- | --- | --- |\n|  | | | \u003Cbr>Dr. Mayank Vijayvargia |\n|  | \u003Cbr>1Department of Orthopaedics, P.D. Hinduja Hospital and Medical Research Centre, Mumbai, Maharashtra, India.\u003Cbr>Address of Correspondence:\u003Cbr>Dr. Sanjay Agarwala,\u003Cbr>Department of Orthopaedics, P D Hinduja Hospital and Medical Research Centre, Veer Savarkar Marg, Mahim (West), Mumbai-400016, Maharashtra, India. [E-mail:](E-mail: drsa2011@gmail.com)[ drsa2011@gmail.com](E-mail: drsa2011@gmail.com) |  |  |\n| Submitted: 10/09/2025; Review: 24/10/2025; Accepted: November 2025; Published: December 2025 |  |  |  |\n| DOI: [https://doi.org/10.13107/jocr.2025.v15.i12.6532](https://doi.org/10.13107/jocr.2025.v15.i12.6532)\u003Cbr>© The Author(s). 2025 Open Access. This article is distributed under ","cbCainjacmu7UjoH","https://ap.wps.com/l/cbCainjacmu7UjoH","pdf",5657371,"English","# Surgical Technical Note\n## Learning Point of the Article\n## Abstract\n## Introduction\n## Surgical Technique for the FDLT\n## Conclusion","[{\"question\":\"What is the forced drop leg test (FDLT) and what does it assess during total hip arthroplasty?\",\"answer\":\"FDLT is an intraoperative method that dynamically checks femoroacetabular joint stability during total hip replacement. It evaluates resistance to dislocation by simulating high-risk movement patterns.\"},{\"question\":\"How is the FDLT performed during surgery?\",\"answer\":\"After standard exposure and placement of trial implants, the leg is abducted to 30–40° and then forcefully dropped into a sterile pouch in front. The surgeon examines the hip for signs of dislocation or subluxation under controlled force and direct visualization.\"},{\"question\":\"What should be done if dislocation or subluxation occurs during the FDLT?\",\"answer\":\"Dislocation or subluxation prompts reassessment of component size and position. Adjustments are made to the positioning and/or size of the components, followed by confirmation of stability.\"}]","The Forced Drop Leg Test - A Novel Intraoperative Technique Enhancing Stability Assessments in Total Hip Arthroplasty | PDF",1790720917]