Physical Therapists are well educated in anatomy/physiology, medial differential diagnosis to determine when Trigger Point Dry Needling is the appropriate tool to utilize within a treatment plan.  Practitioners are required to complete additional training to achieve certification to utilize this additional practice tool. TPDN is a tool utilized in the Physical Therapy  scope very differently than the theories of acupuncture.  TPDN  and is well within the scope of Physical Therapy practice.