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About

Justin Chang is a leading orthopedic researcher whose work centers on advancing total knee arthroplasty (TKA) through precision alignment techniques and emerging technologies. His most influential contribution is the development and validation of **functional alignment** in TKA, a technique that prioritizes soft-tissue balance over rigid mechanical alignment. His landmark 2021 study, cited over 126 times, demonstrated that functional alignment achieves superior soft-tissue balance using quantitative sensor-guided technology, fundamentally shifting how surgeons approach implant positioning. Chang’s comprehensive review on current TKA concepts (93 citations) provides essential guidance on the biomechanical trade-offs between alignment strategies. He has also investigated the biomechanical impact of anterior cruciate ligament resection (25 citations), revealing critical insights into gap balancing during primary TKA. More recently, Chang has explored the frontier of **robotic and augmented reality guidance** in knee arthroplasty, publishing a hierarchical task analysis that systematically maps the integration of these technologies into surgical workflows. His work on robotic-arm assisted lateral unicompartmental knee arthroplasty, though early in citation count, addresses an important gap in outcomes for isolated lateral compartment disease. With a research portfolio spanning from fundamental biomechanics to cutting-edge surgical navigation, Chang is shaping the next generation of personalized, technology-enhanced knee replacement surgery.