TMDs and TrPs –Temporomandibular joint disorders include acute, painful inflammation of the TMJ and chronic, non-inflammatory joint conditions. Either one can lead to the activation of painful trigger points in various neck and masticatory muscles. These TrPs can also occur independently and are the most prevalent cause of painful symptoms. While most sufferers of TMD have TrPs, not all who have T...rPs in the muscles of mastication have TMD.
The TMJs are bilateral compound synovial joints with a fibrous tissue surface capable of remodeling under stress – something the hyaline cartilage in most synovial joints cannot do. Each TMJ contains an articular disc that essentially divides the joint into upper and lower compartments and acts as a third bone in hinge-sliding movements.
In this illustration of the “click” of early stage TMD, (A) is a rest, (B) as the condyle begins to translate forward it must override a thickness of posterior disc material, causing a click and in (C) and (D) opening of the mandible and translation of the condyle continue normally.
The TMJs are bilateral compound synovial joints with a fibrous tissue surface capable of remodeling under stress – something the hyaline cartilage in most synovial joints cannot do. Each TMJ contains an articular disc that essentially divides the joint into upper and lower compartments and acts as a third bone in hinge-sliding movements.
In this illustration of the “click” of early stage TMD, (A) is a rest, (B) as the condyle begins to translate forward it must override a thickness of posterior disc material, causing a click and in (C) and (D) opening of the mandible and translation of the condyle continue normally.
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