Evaluating Temporomandibular Disorder Severity: A Four-Dimensional Model

Area of Science:

• Oral and Maxillofacial Surgery
• Dental Research
• Pain Management

Background:

• Temporomandibular disorders (TMDs) pose a significant challenge in diagnosis and management.
• Existing diagnostic criteria for TMDs require a more comprehensive severity assessment tool.
• The five core symptoms (5Ts) of the Diagnostic Criteria for TMDs (DC/TMD) provide a basis for evaluating TMD severity.

Purpose of the Study:

• To develop and validate a multi-dimensional model for assessing TMD severity.
• To expand the 5Ts screener by incorporating duration, frequency, intensity, and interference (5Ts-4D).
• To evaluate the reliability and validity of the 5Ts-4D in diverse TMD patient groups.

Main Methods:

• The 5Ts-4D was developed by adding four dimensions to the existing 5Ts screener.
• Participants with no TMD (NT), intra-articular TMD (IT), pain-related TMD (PT), and combined TMD (CT) were recruited.
• The 5Ts-4D, GCPS, JFLS-8, and OHIP-TMD were administered; reliability and validity were tested.

Main Results:

• The 5Ts-4D demonstrated strong internal consistency (Cronbach's alpha 0.83-0.95) and reliability (ICC 0.51-0.97).
• The tool showed significant differences between TMD groups (PT, CT, IT vs. NT).
• Convergent validity was confirmed through strong correlations with JFLS-8 and OHIP-TMD.

Conclusions:

• The 5Ts-4D is a reliable and valid instrument for assessing TMD symptoms and severity.
• This tool offers a straightforward approach to evaluating TMD.
• The 5Ts-4D can contribute to improved management strategies for patients with TMDs.