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Related Experiment Video

Updated: Jun 12, 2026

Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology

Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology

Published on: August 22, 2022

The association between neck disability and jaw disability.

S Armijo Olivo¹, J Fuentes, P W Major

¹Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, AB, Canada. sla4@ualberta.ca

Journal of Oral Rehabilitation

|June 8, 2010

Summary

Neck and jaw disability are strongly linked in temporomandibular disorders (TMD) patients. Addressing both neck disability (NDI) and jaw disability (JFS) is crucial for effective treatment outcomes.

Related Experiment Videos

Last Updated: Jun 12, 2026

Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology

Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology

Published on: August 22, 2022

Area of Science:

Orthopedics
Dentistry
Physical Therapy

Background:

The association between cervical spine disorders (CSD) and temporomandibular disorders (TMD) is well-established.
However, the specific relationship between the severity of jaw disability and neck disability remains underexplored.

Purpose of the Study:

To investigate the relationship between neck disability, measured by the Neck Disability Index (NDI), and jaw disability, measured by the Jaw Function Scale (JFS).

Main Methods:

A cross-sectional study involving 154 participants from a TMD/Orofacial Pain clinic and university community.
Data collected included NDI, JFS, Jaw Disability Checklist (JDC), and the chronic pain grade disability questionnaire.
Spearman rho and multiple regression analyses were employed.

Main Results:

A strong positive correlation (r = 0.82) was observed between neck disability and jaw disability.
Individuals with high-level TMD disability (grade IV) showed an average NDI increase of approximately 19 points compared to those without TMD.

Conclusions:

Significant clinical implications exist, suggesting that treatment for TMD should concurrently address associated neck disability.
Improving one condition may positively impact the other, highlighting the interconnectedness of these disorders.