Can temporomandibular dysfunction signs be predicted by early morphological or functional variables?

Area of Science:

• Dentistry
• Orthodontics
• Speech-Language Pathology

Background:

• Orofacial dysfunctions, malocclusions, and occlusal interferences are common in children.
• Temporomandibular dysfunction (TMD) is a prevalent condition affecting young adults.
• Predictive factors for TMD development require further investigation.

Purpose of the Study:

• To determine if early orofacial signs predict later temporomandibular dysfunction (TMD) in young adults.
• To identify specific malocclusions, occlusal interferences, or speech issues associated with TMD development.
• To analyze the influence of gender on TMD risk.

Main Methods:

• Longitudinal study tracking 97 subjects (48 speech therapy referrals, 49 controls) from age 7 to 19.
• Examinations included speech articulation, oral motor skills, occlusion, TMD signs (muscle/joint tenderness, jaw deviation, clicking), and mandibular movement.
• Statistical analysis using multiple logistic regression models to assess predictive relationships.

Main Results:

• Excessive overjet was the only consistent predictor of increased TMD risk.
• Females demonstrated a higher propensity for developing TMD compared to males.
• While some local and central factors were occasionally linked to TMD during growth, their predictive value for individual risk was low.

Conclusions:

• Excessive overjet is a significant risk indicator for TMD development in young adults.
• Gender influences TMD susceptibility, with females being at higher risk.
• Early orofacial and occlusal factors have limited predictive power for individual TMD risk, despite occasional associations during development.