The current minimum training standard for orthopaedic surgeons in the United States consists of a 5-year orthopaedic surgery residency program with the option to pursue subsequent fellowship training.1 Traditionally, orthopaedic residency training was intended to expose residents to all aspects of orthopaedic surgery and prepare them for general orthopaedic practice.1,2 The demand for increasing subspecialization, more duty hour restrictions, and greater supervision requirements have rapidly changed the clinical experience of orthopaedic surgery trainees. As training requirements and expectations for orthopaedic surgical graduates continue to expand and the body of knowledge and technical applications in orthopaedic surgery continue to grow, it has become more apparent that our traditional 5-year residency pathway may be increasingly insufficient for preparing trainees for the future world of independent orthopaedic surgical practice. Subspecialty fellowship training, therefore, may be evolving as an educational necessity to help trainees meet the demands of society's evolving definition of orthopaedic competence rather than an educational option. Compared to several decades ago when a minority of orthopaedic surgery trainees pursued additional fellowship training,3 approximately 90% of the current class of orthopaedic graduates plans to complete at least 1 fellowship after completing residency.4–,6 There also seems to be a new trend toward pursuing more than 1 fellowship.6 All of these transitions have coincidentally appeared with the recent changes in residency training regulations and societal expectations. It is possible that this is a matter of simple math: shorter periods of clinical exposure (less input) cannot possibly result in equal experience upon graduation (same output). Since the baseline input (residency training) cannot be overhauled, additional input (fellowship training) is sought to reach the same end point.
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