Related Experiment Video
Updated: Jul 15, 2026
06:37
Temporomandibular Joint Pain Measurement by Bite Force and Von Frey Filament Assays in Mice
Published on: September 13, 2024
Occlusal risk factors for temporomandibular disorders
Caio M P Selaimen1, José C M Jeronymo, Diego P Brilhante
1Faculty of Dentistry, Pontifical Catholic University of Rio Grande do Sul--PUCRS, Brazil.
The Angle Orthodontist
|May 1, 2007
Summary
Angle Class II malocclusion and lack of canine guidance are key risk factors for temporomandibular disorders (TMDs). These occlusal issues increase TMD development risk, even when considering other factors.
Area of Science:
- Dental Occlusion
- Temporomandibular Disorders (TMDs)
- Risk Factor Analysis
Background:
- Temporomandibular disorders (TMDs) encompass a range of conditions affecting the jaw joint and muscles.
- Identifying specific risk factors is crucial for understanding TMD etiology and prevention.
- Occlusal variables have been implicated as potential contributors to TMD development.
Purpose of the Study:
- To investigate the association between various occlusal variables and the risk of developing TMD.
- To determine if specific malocclusions or guidance patterns serve as significant risk indicators for TMD.
Main Methods:
- A case-control study involving 72 TMD patients and 30 pain-free controls.
- Evaluation of occlusal variables including overbite, overjet, tooth count, canine guidance, centric slide, and Angle Class malocclusion.
- Statistical analysis using unconditional logistic regression to calculate odds ratios (OR) and control for confounders.
Main Results:
- Angle Class II malocclusion showed a significantly higher prevalence in TMD patients (crude OR = 8.0).
- Absence of bilateral canine guidance during lateral excursion was also more common in TMD patients (crude OR = 3.9).
- Adjusted analyses confirmed these associations, with adjusted ORs for Angle Class II and lack of canine guidance ranging from 8.3-12.4 and 2.2-4.1, respectively.
Conclusions:
- Angle Class II malocclusion is a significant risk indicator for TMD development.
- The absence of bilateral canine guidance on lateral excursion is also an important risk factor for TMD.
- These findings hold true even after accounting for sociodemographic factors as effect modifiers.
Related Concept Videos
01:26Assessment of the Mouth
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.
01:15Teeth
The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
01:27The Oral Microbiota
The oral microbiome includes a complex ecosystem comprising over 700 microbial species, identified through genomic sequencing and culture-based analyses to date. This community includes a core microbiome, found universally among individuals, and a variable component influenced by environmental factors such as diet, lifestyle, and host genetics. Site-specific conditions, including oxygen gradients, pH levels, and nutrient availability, determine the spatial distribution of these microorganisms...
01:26Factors Affecting the Risk of Infection
The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin create...
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin create...
01:21Tooth Anatomy
The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.
01:11Oral Cavity
The oral cavity, or the mouth, is a complex structure in humans that plays a vital role in our day-to-day lives. Its role is not only in chewing and swallowing food; it also plays a role in speech and facial expressions.
Teeth: The teeth are the hardest structures in our bodies. Humans have two sets of teeth throughout their lifetime: deciduous (baby) teeth and permanent teeth. Each tooth consists of several parts: the crown (visible part), the root (embedded in the jaw), enamel (hard outer...
Teeth: The teeth are the hardest structures in our bodies. Humans have two sets of teeth throughout their lifetime: deciduous (baby) teeth and permanent teeth. Each tooth consists of several parts: the crown (visible part), the root (embedded in the jaw), enamel (hard outer...