Entry level physical therapists have been through an extensive amount of school based on evidence based research and are considered experts in the field of anatomy and biomechanics.  In addition to a fundamental understanding of the human body they are also required to get post graduate level training in dry needling specifically before practicing dry needling.  PTs are able to differentiate between patients who would and would not benefit from dry needling.  Dry needling is a single tool of the many within any therapists "tool belt" and is well within our scope of practice.