A Derangement is an error in movement caused by a disruption of the normal articulation of the joint surfaces. i.e. an anteriorly displaced disc
A Dysfunction is an error in movement from shortened and adapted tissues that when stretched or loaded, produce pain. e.g increased tone in masseter limiting opening
A Deflection is an uneven movement pattern measured during jaw opening where the jaw moves away from the midline and does not return
A Deviation is an uneven movement pattern assessed during jaw opening where the jaw moves away from the midline, overcomes an obstruction, and then returns to the midline.
- Acute pain is of short duration (typically less than a week) and heals over time. Acute pain can lead to chronic pain
Chronic pain is pain that the patient has been experiencing for greater than 3 months.
Dystrophy is progressive weakening and wasting of muscle tissue.