In this issue of Physical Medicine and Rehabilitation Clinics, guest editors Drs. Michael Khadavi and Luga Podesta bring their considerable expertise to the topic of Orthobiologics. Use and research surrounding naturally derived substances that are used to help heal and repair orthopedic injuries are expanding rapidly. In this issue, top experts discuss the most up-to-date uses of orthobiologics in the rehabilitation setting. Contains 16 practice-oriented topics including orthobiologics for spine disorders; evidence and techniques in prolotherapy; orthobiologic interventions for muscle injuries; special populations in orthobiologics: athletic, elderly, and pediatrics populations; rehabilitation protocols for orthobiologic procedures; orthobiologic techniques for surgical augmentation; and more.  Provides in-depth clinical reviews on orthobiologics, offering actionable insights for clinical practice.  Presents the latest information on this timely, focused topic under the leadership of experienced editors in the field. Authors synthesize and distill the latest research and practice guidelines to create clinically significant, topic-based reviews.