Prolonged use of ill-fitting and misaligned dentures can lead to problems with the tempromandibular ( TM ) Joint. Symptoms of TM joint dysfunction include:

Popping and/or grating sounds associated with any type of jaw movement.
Headaches, earaches and/or a limited range of jaw movement.
Chronic stiffness or pain in neck, shoulders, back or jaw.

In most cases damage to the TM joint is not reversible, but with early detection and proper management of the occlusal scheme and following the advice of your clinician; the possibility of further damage can be reduced.