Temporomandibular joint (TMJ) disorder is a common disorder affecting the jaw, jaw joints, and the facial muscles that control the jaw; symptoms can also radiate to surrounding areas. The treatment position of the TMJ is an important part of the treatment planning process, which is now made easier with Doppler auscultation. Basically a stethoscope for the joint, it uses Doppler wave effects to indicate the amount of friction and lubrication present within the TMJ. This enables us to recommend a more precise treatment plan for the individual patient.