Related Experiment Video
Updated: Feb 23, 2026
06:37
Temporomandibular Joint Pain Measurement by Bite Force and Von Frey Filament Assays in Mice
Published on: September 13, 2024
2.1K
TMJ symptoms reduce chewing amplitude and velocity, and increase variability
John C Radke1, Greg J Kamyszek1, Robert S Kull2
1a BioResearch Associates, Inc. , Milwaukee , WI , USA.
Cranio : the Journal of Craniomandibular Practice
|September 5, 2017
Summary
Subjects with temporomandibular joint (TMJ) internal derangements (ID) exhibit altered chewing patterns. Gum chewing analysis revealed reduced amplitude and velocity, with increased variability in the TMJ internal derangement group.
Area of Science:
- Biomechanical analysis of mastication
- Temporomandibular joint disorders
Background:
- Temporomandibular joint (TMJ) internal derangements (ID) can affect masticatory function.
- Understanding jaw movement alterations is crucial for diagnosing and managing TMJ disorders.
Purpose of the Study:
- To investigate if mandibular amplitude, velocity, and variability during gum chewing differ in individuals with TMJ internal derangements (ID) compared to healthy controls.
- To test the null hypothesis that chewing parameters are unchanged in TMJ ID.
Main Methods:
- Thirty symptomatic subjects with confirmed TMJ internal derangements (ID) and a gender/age-matched control group participated.
- Masticatory jaw movements during gum chewing were recorded using an incisor-point jaw tracker.
- Student's t-test was employed to compare mean chewing parameters between the ID and control groups.
Main Results:
- The control group demonstrated significantly greater mandibular amplitude (wider opening) and velocity (faster chewing) compared to the ID group (p < 0.05).
- The mean chewing cycle time was longer (0.929 s vs. 0.751 s) and more variable in the ID group than in the control group (p < 0.05).
Conclusions:
- The study rejected the null hypothesis, finding that TMJ internal derangements significantly alter chewing biomechanics.
- Individuals with TMJ ID exhibit reduced mandibular amplitude and velocity, alongside increased chewing variability.
- Further research into patient adaptation mechanisms for TMJ internal derangements is warranted.
Related Concept Videos
01:25Deglutition
6.5K
Swallowing, otherwise known as deglutition, facilitates the transport of food from the mouth to the stomach. It is a multifaceted process that involves both the tongue and the muscles of the throat and esophagus. Saliva and mucus aid in this process, which takes approximately 4 to 8 seconds for semi-solid or solid food and around 1 second for liquids or very soft food.
Swallowing can be divided into three stages: the voluntary phase, the pharyngeal phase, and the esophageal phase. Although the...
Swallowing can be divided into three stages: the voluntary phase, the pharyngeal phase, and the esophageal phase. Although the...
6.5K
01:20Mitral Regurgitation I: Introduction
678
Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...
678
01:26Tonsillitis II: Management
469
This lesson will focus on the different treatment options for managing tonsillitis, which typically depend on the cause and severity.
469
01:26Assessment of the Mouth
1.3K
A thorough mouth assessment, including inspection and palpation of the lips, gums, tongue, tonsils, uvula, and pharynx, is crucial in detecting potential health issues. Diseases ranging from oral cancer to systemic conditions like diabetes could be identified early through careful oral examination. This article provides a detailed guide on conducting a comprehensive mouth assessment.
Mouth Inspection
The inspection begins with visually examining the mouth for symmetry, color, and size.
Mouth Inspection
The inspection begins with visually examining the mouth for symmetry, color, and size.
1.3K
01:14Conditioned Taste Aversion
1.0K
Conditioned taste aversion, also known as sauce béarnaise syndrome, is a phenomenon in which an individual develops an aversion to a certain food taste following a negative experience, typically illness. This form of aversion is a type of classical conditioning in which the taste of the food (conditioned stimulus, CS) is associated with the experience of illness (unconditioned stimulus, UCS).
A notable characteristic of conditioned taste aversion is that it often requires only a single...
A notable characteristic of conditioned taste aversion is that it often requires only a single...
1.0K
01:30Tonsillitis I: Introduction
2.5K
Tonsillitis is inflammation of the tonsils, which are two lymphoid tissue masses at the back of the throat. This condition can cause discomfort and irritation in the throat.
Etiology
Three primary contributing factors have been identified.
Etiology
Three primary contributing factors have been identified.
2.5K