Structural hard-tissue changes in temporomandibular joints with internal derangement.

Area of Science:

• Dentistry
• Orthodontics
• Radiology

Background:

• Conflicting literature exists on temporomandibular joint (TMJ) internal derangement and hard-tissue changes.
• Internal derangement involves displacement of the temporomandibular joint disk.
• Understanding structural changes aids in diagnosing TMJ disorders.

Purpose of the Study:

• To analyze the relationship between structural hard-tissue changes and internal derangement of the temporomandibular joint.
• To investigate the prevalence of hard-tissue changes in different types of TMJ internal derangement.
• To determine if hard-tissue changes indicate disease progression.

Main Methods:

• Radiographic analysis, including arthrograms.
• Study included 128 patients diagnosed with internal derangement.
• Patients were categorized based on disk displacement (with/without reduction) and perforation.

Main Results:

• Structural hard-tissue changes were observed in 50% of patients with anterior disk displacement without reduction.
• Changes were infrequent in patients with anterior disk displacement with reduction.
• All joints with disk perforation exhibited structural hard-tissue changes.

Conclusions:

• Structural hard-tissue changes are predominantly found in advanced stages of TMJ internal derangement.
• These changes may serve as indicators of disease progression.
• Disk perforation is consistently associated with hard-tissue alterations.