Dr Merton Root, DPM (1922–2002) is widely considered the ‘father’ of clinical biomechanics in podiatry and the theory (‘Root theory’) that largely underpins the use of foot orthotic is mostly based on his original concepts.

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Dr. Merton L. Root, DPM, was a pioneering podiatrist whose work had a profound and lasting impact on the field of biomechanics and podiatric medicine. Widely regarded as the “father of modern podiatric biomechanics,” he dedicated his career to understanding the structure and function of the human foot. His clinical insights and research shaped how practitioners evaluate, diagnose, and treat foot disorders, moving the profession toward a more scientific and biomechanically grounded approach.

One of Dr. Root’s most significant contributions was the development of the Root Theory of Foot Function, which emphasized the importance of foot alignment and its role in overall biomechanics. He introduced systematic methods for analyzing gait and foot posture, and he advanced the concept of orthotic therapy as a corrective tool rather than just a means of symptom relief. His theories provided a framework that continues to influence orthotic design, foot surgery, and rehabilitation programs today.

Beyond his clinical work, Dr. Root was also a teacher, author, and innovator. His seminal textbook, Normal and Abnormal Function of the Foot (co-authored with Orien and Weed), remains a cornerstone reference in podiatric education. Through teaching, writing, and mentorship, he inspired generations of podiatrists to adopt a rigorous, evidence-based approach. Although aspects of his theories have been debated and refined over time, his legacy endures in the foundational role he played in establishing podiatry as a respected medical specialty grounded in biomechanics.

Most Useful Resources:
Merton L. Root (PodiaPaedia)
Root Theory (PodiaPaedia)
Root Functional Orthotic (PodiaPaedia)
The wit and wisdom of … Merton Root (Podiatry Arena)

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