{"id":1223,"date":"2026-10-24T00:30:38","date_gmt":"2026-10-23T16:30:38","guid":{"rendered":"https:\/\/orthojiunliang.tw\/?post_type=news&#038;p=1223"},"modified":"2026-10-24T00:30:39","modified_gmt":"2026-10-23T16:30:39","slug":"leg-length-discrepancy-daa","status":"publish","type":"news","link":"https:\/\/orthojiunliang.tw\/en\/news\/leg-length-discrepancy-daa\/","title":{"rendered":"\u63db\u9ad6\u95dc\u7bc0\u6703\u9577\u77ed\u8173\u55ce\uff1fDAA \u624b\u8853\u5982\u4f55\u5354\u52a9\u63a7\u5236\u817f\u9577\u5dee\u7570"},"content":{"rendered":"\n<style>body:has(.jl-news-header) .elementor-location-header{display:none!important}\n.jl-news .jl-news-header{max-width:1440px;margin:0 auto;padding:24px 4.7% 0;background:#fff}\n.jl-news .jl-nav{display:flex;align-items:center;justify-content:space-between;gap:22px;background:#fff;border:1px solid #dce4eb;border-radius:50px;padding:14px 25px;position:relative;z-index:3;color:#435766}\n.jl-news .jl-logo{display:block;position:relative;flex:0 0 188px;height:44px}\n.jl-news .jl-logo img{position:absolute;left:0;top:0;width:142px;height:44px;max-width:none;clip-path:inset(0 69% 0 0)}\n.jl-news .jl-logo::before{content:\"\u9673\u4fca\u826f\u91ab\u5e2b\";position:absolute;left:54px;top:0;font-size:20px;line-height:1.4;letter-spacing:.06em;font-weight:600;color:#102d49}\n.jl-news .jl-logo::after{content:\"CHEN JIUN LIANG\";position:absolute;left:54px;bottom:0;font-family:Arial,sans-serif;font-size:11px;line-height:1.4;letter-spacing:.06em;color:#4c687e;white-space:nowrap}\n.jl-news .jl-navlinks{display:flex;gap:22px;align-items:center;font-size:14px;white-space:nowrap}\n.jl-news .jl-navlinks a{min-height:44px;display:flex;align-items:center}\n.jl-news .jl-navlinks a[aria-current]{color:#327a98;font-weight:600}\n.jl-news .jt-intro{padding-top:48px}\n@media(max-width:820px){.jl-news .jl-nav{padding:12px 20px;gap:14px}.jl-news .jl-navlinks{gap:13px;font-size:12px}}\n@media(max-width:620px){.jl-news .jl-news-header{padding:16px 20px 0}.jl-news .jl-nav{border-radius:16px;flex-wrap:wrap;justify-content:center;gap:9px;padding:14px 10px 10px}.jl-news .jl-navlinks{width:100%;gap:0;justify-content:space-around;white-space:normal;text-align:center;font-size:11px}.jl-news .jl-navlinks a{padding:6px 3px;min-height:44px;display:flex;align-items:center;justify-content:center}.jl-news .jt-intro{padding-top:36px}}\n@media(max-width:355px){.jl-news .jl-news-header{padding-left:14px;padding-right:14px}}\n\n\n.jl-news{font-family:\"PingFang TC\",Arial,sans-serif}.jl-news a{color:inherit;text-decoration:none}\n.jl-education{color:#12304b;background:#fff;font:17px\/1.9 \"PingFang TC\",\"Noto Sans TC\",Arial,sans-serif}\n.jl-education *{box-sizing:border-box}.jl-education a{color:#286984;text-underline-offset:4px}.jl-education a:focus-visible{outline:3px solid #347e9b;outline-offset:4px}\n.jl-education h1,.jl-education h2,.jl-education h3{font-family:inherit;color:#12304b;line-height:1.5;letter-spacing:.02em}.jl-education p{margin:0 0 20px}\n.je-wrap{max-width:1120px;width:calc(100% - 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40px)}.je-hero{padding:30px 0 25px}.je-hero h1{font-size:29px}.je-intro{font-size:17px;padding-top:25px}.je-section{grid-template-columns:1fr;gap:22px;padding:28px 0}.je-section h2{font-size:23px}.je-figure{padding:18px}.je-closing{padding:20px}.je-cta{gap:12px}.je-cta a{width:100%}.je-byline{font-size:12px}}\n.je-faq{padding:28px 0}.je-faq details{border-bottom:1px solid #d6e2eb;padding:18px 0}.je-faq summary{font-weight:600;cursor:pointer}.je-faq details p{padding-top:14px}.jl-leg-sketch{position:relative;height:160px;width:140px;margin:12px auto 22px;border-bottom:2px dashed #a8c1d2}.jl-leg-sketch:before,.jl-leg-sketch:after{content:\"\";position:absolute;top:12px;width:20px;border:3px solid #39738d;border-radius:12px;background:#e0ecf3;left:35px;height:130px}.jl-leg-sketch:after{left:85px;height:110px}.je-takeaway{padding:22px 26px;border-left:3px solid #347e9b;background:#eef4f8;margin:22px 0 0}.je-takeaway strong{display:block;margin-bottom:5px}.je-figure .je-node{font-size:15px}.je-byline a{color:inherit}<\/style><div class=\"jl-news\" data-no-translation><header class=\"jl-news-header\"><nav class=\"jl-nav\" aria-label=\"\u7db2\u7ad9\u5c0e\u89bd\">\n        <a class=\"jl-logo\" aria-label=\"\u9673\u4fca\u826f\u91ab\u5e2b CHEN JIUN LIANG\" href=\"https:\/\/orthojiunliang.tw\/en\/\"><img src=\"https:\/\/orthojiunliang.tw\/wp-content\/uploads\/Frame-1171277234-300x93-1.png\" decoding=\"async\" loading=\"eager\" alt=\"\u9673\u4fca\u826f\u91ab\u5e2b CHEN JIUN LIANG\" width=\"300\" height=\"93\"><\/a>\n        <div class=\"jl-navlinks\">\n          <a href=\"https:\/\/orthojiunliang.tw\/en\/\">Home<\/a>\n          <a href=\"https:\/\/orthojiunliang.tw\/en\/about\/\">Dr. Chen<\/a>\n          <a href=\"https:\/\/orthojiunliang.tw\/en\/services\/\">Treatments<\/a>\n          <a href=\"https:\/\/orthojiunliang.tw\/en\/news\/\" aria-current=\"page\">News<\/a>\n          <a href=\"https:\/\/orthojiunliang.tw\/en\/faq\/\">FAQs<\/a>\n        <\/div>\n      <\/nav><\/header><\/div><div class=\"jl-education\" data-no-translation><article class=\"je-wrap\"><header class=\"je-hero\"><a class=\"je-back\" href=\"https:\/\/orthojiunliang.tw\/en\/news\/#patient-education\">\u2190 Back to patient education<\/a><p class=\"je-eye\">HIP \u00b7 LEG LENGTH \u00b7 JOINT HEALTH JOURNAL<\/p><h1>Unequal legs after hip replacement? How DAA helps manage leg length<\/h1><div class=\"je-byline\">Dr. Chen Jiun Liang website \u00b7 Patient education \u00b7 Updated 24 October 2026<\/div><\/header><p class=\"je-intro\">Concern about unequal legs is understandable when planning a hip replacement. A difference may already exist before surgery. The direct anterior approach (DAA) can facilitate intraoperative comparison and measurement, but cannot guarantee perfectly equal leg lengths.<\/p><section class=\"je-section\"><div><h2>First identify where the difference comes from<\/h2><p>Unequal legs may relate to development, an old fracture or joint disease. Pelvic tilt or joint contracture can also create an apparent difference. Assessment combines posture, gait, examination and, when needed, standing full-length X-rays.<\/p><div class=\"je-cites\"><a href=\"https:\/\/www.hss.edu\/health-library\/conditions-and-treatments\/list\/leg-length-discrepancy\" target=\"_blank\" rel=\"noopener\">HSS: leg length<\/a><a href=\"https:\/\/www.schulthess-klinik.ch\/sites\/default\/files\/documents\/2020-09\/manual-hueftprothese-schulthess-klinik.pdf\" target=\"_blank\" rel=\"noopener\">Schulthess Klinik: assessment<\/a><\/div><\/div><figure class=\"je-figure\"><small>ILLUSTRATION 01<\/small><h3>Different sources of unequal leg length<\/h3><div class=\"jl-leg-sketch\" aria-hidden=\"true\"><\/div><div class=\"je-graph je-graph-compare\" role=\"img\" aria-label=\"Different sources of unequal leg length: A structural bone or joint difference; Effects of pelvic position or contracture\"><div class=\"je-nodes\"><div class=\"je-node\">A structural bone or joint difference<\/div><div class=\"je-node\">Effects of pelvic position or contracture<\/div><\/div><\/div><figcaption>Concept only: structural and positional factors may coexist. Appearance alone is not a diagnosis.<\/figcaption><\/figure><\/section><section class=\"je-section\"><div><h2>How can DAA help control leg length?<\/h2><p>DAA is usually performed with the patient lying on their back, allowing leg comparison and optional imaging. Planning and measurements help manage length. A 2024 review found fewer differences over 1 cm in DAA comparison studies, but mostly low-level evidence does not establish a guarantee.<\/p><div class=\"je-cites\"><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/39087513\/\" target=\"_blank\" rel=\"noopener\">2024 systematic review<\/a><a href=\"https:\/\/www.orthoinfo.org\/treatment\/total-hip-replacement\/\" target=\"_blank\" rel=\"noopener\">AAOS: hip replacement<\/a><\/div><\/div><figure class=\"je-figure\"><small>ILLUSTRATION 02<\/small><h3>Three parts of leg-length planning<\/h3><div class=\"je-graph je-graph-path\" role=\"img\" aria-label=\"Three parts of leg-length planning: Before surgery: assess existing length and pelvis; During surgery: compare, measure and consider imaging; Implant positioning: balance length and stability\"><div class=\"je-nodes\"><div class=\"je-node\">Before surgery: assess existing length and pelvis<\/div><div class=\"je-node\">During surgery: compare, measure and consider imaging<\/div><div class=\"je-node\">Implant positioning: balance length and stability<\/div><\/div><\/div><figcaption>The diagram does not imply identical equipment for every patient. Methods depend on the surgical plan.<\/figcaption><\/figure><\/section><section class=\"je-section\"><div><h2>Leg length and hip stability both matter<\/h2><p>Hip replacement must restore function and stability as well as length. Surgeons balance these goals and soft-tissue tension. If one leg feels longer afterwards, report it at follow-up. Examination guides observation, rehabilitation or consideration of a shoe lift. DAA does not treat every cause of unequal legs.<\/p><div class=\"je-cites\"><a href=\"https:\/\/www.orthoinfo.org\/treatment\/total-hip-replacement\/\" target=\"_blank\" rel=\"noopener\">AAOS: hip replacement<\/a><a href=\"https:\/\/www.schulthess-klinik.ch\/sites\/default\/files\/documents\/2020-09\/manual-hueftprothese-schulthess-klinik.pdf\" target=\"_blank\" rel=\"noopener\">Schulthess Klinik: assessment<\/a><\/div><\/div><figure class=\"je-figure\"><small>ILLUSTRATION 03<\/small><h3>Plan for overall function<\/h3><div class=\"je-graph je-graph-path\" role=\"img\" aria-label=\"Plan for overall function: Leg-length balance; Hip stability; Soft-tissue tension\"><div class=\"je-nodes\"><div class=\"je-node\">Leg-length balance<\/div><div class=\"je-node\">Hip stability<\/div><div class=\"je-node\">Soft-tissue tension<\/div><\/div><\/div><figcaption>Reconstruction and walking function are individualized; a single length measurement is not the only goal.<\/figcaption><\/figure><\/section><section class=\"je-faq\"><h2>Frequently asked questions<\/h2><details><summary>Who assesses unequal leg lengths?<\/summary><p>An orthopaedic clinician can assess leg length, the pelvis and joints. For concerns after hip replacement, start with your operating surgeon.<\/p><\/details><details><summary>Does DAA guarantee equal legs?<\/summary><p>No. Positioning and measurement can help control discrepancy, but anatomy, planning and stability requirements still matter.<\/p><\/details><\/section><p class=\"je-closing\">Care includes soft-tissue preservation when appropriate and support through recovery. Bring previous imaging and describe when the difference began and which activities are uncomfortable.<\/p><div class=\"je-cta\"><strong>Discuss your next step<\/strong><a href=\"https:\/\/orthojiunliang.tw\/en\/services\/\u6b63\u524d\u4f4d\u4eba\u5de5\u9ad6\u95dc\u7bc0\u7f6e\u63db\/\">Explore DAA surgery \u2192<\/a><a href=\"https:\/\/orthojiunliang.tw\/en\/about\/#jl-clinic\">Clinic information \u2192<\/a><\/div><section class=\"je-related\"><h2>Continue reading<\/h2><a href=\"https:\/\/orthojiunliang.tw\/en\/news\/daa-anterior-hip-replacement-guide\/\">What is DAA hip replacement? \u2192<\/a><a href=\"https:\/\/orthojiunliang.tw\/en\/news\/hip-implant-selection-guide\/\">Choosing a hip implant \u2192<\/a><\/section><p class=\"je-disclaimer\">General education does not replace individual assessment. Diagrams illustrate concepts, not a diagnosis or guaranteed result.<\/p><\/article><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u63db\u9ad6\u95dc\u7bc0\u524d\uff0c\u5148\u4e86\u89e3\u9577\u77ed\u8173\u539f\u56e0\u3002\u4ee5\u4e09\u5f35\u793a\u610f\u5716\u8a8d\u8b58 DAA \u5982\u4f55\u5354\u52a9\u63a7\u5236\u8853\u5f8c\u817f\u9577\u5dee\u7570\uff0c\u4e26\u517c\u9867\u95dc\u7bc0\u7a69\u5b9a\u8207\u5fa9\u539f\u7167\u8b77\u3002<\/p>","protected":false},"featured_media":0,"parent":0,"template":"","news-category":[21],"class_list":["post-1223","news","type-news","status-publish","hentry","news-category-joint-health"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u4eba\u5de5\u9ad6\u95dc\u7bc0\u8853\u5f8c\u9577\u77ed\u8173\uff5cDAA \u5982\u4f55\u63a7\u5236\u817f\u9577\u5dee\u7570\uff5c\u9673\u4fca\u826f\u91ab\u5e2b<\/title>\n<meta name=\"description\" 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