Related Experiment Video
Updated: May 31, 2026
08:12
Micro-dissection of Enamel Organ from Mandibular Incisor of Rats Exposed to Environmental Toxicants
Published on: March 29, 2018
Chronic fluoride toxicity: dental fluorosis.
Monographs in Oral Science
|June 25, 2011
Summary
Excess fluoride ingestion during childhood causes dental fluorosis by affecting tooth enamel formation. This leads to hypomineralization, staining, and pitting, impacting tooth appearance and structure.
Area of Science:
- Biochemistry
- Developmental Biology
- Dental Science
Background:
- Dental fluorosis results from excessive fluoride intake during tooth development.
- It manifests as enamel hypomineralization, staining, and pitting, primarily affecting children.
- The condition's severity correlates with fluoride dosage and exposure duration.
Purpose of the Study:
- To elucidate the molecular and cellular mechanisms underlying dental fluorosis.
- To investigate the impact of fluoride on enamel protein dynamics and mineral deposition during tooth formation.
Main Methods:
- In vitro studies examining fluoride's effect on protein-mineral interactions in forming enamel.
- Analysis of amelogenin levels and proteinase activity in fluorosed enamel.
- Investigation of fluoride-induced changes in mineral precipitation and ameloblast modulation.
Main Results:
- Fluoride incorporation into forming enamel delays amelogenin removal, leading to hypomineralization.
- Altered protein-mineral interactions contribute to amelogenin retention in fluorosed enamel.
- Fluoride enhances mineral precipitation, creating hypermineralized bands followed by hypomineralized zones, potentially affecting ameloblast function.
Conclusions:
- Altered protein-mineral interactions and delayed amelogenin removal are key mechanisms in dental fluorosis development.
- Fluoride's impact on mineral deposition and ameloblast modulation contributes to enamel defects.
- Further research is needed to fully understand fluoride's cellular effects in dental fluorosis.
Related Concept Videos
01:26Minerals
Minerals are essential nutrients that the human body needs in small amounts to work properly. They play a vital role in many bodily functions, such as building strong bones and transmitting nerve impulses. Some minerals are needed for hormone production or to maintain a normal heartbeat. Major minerals include calcium, phosphorus, potassium, sulfur, sodium, chlorine, and magnesium, while trace minerals include iron, manganese, copper, iodine, zinc, cobalt, fluoride, and selenium.
01:24Chronic Kidney Disease II: Clinical Manifestations
Chronic Kidney Disease (CKD) progressively impairs multiple body systems due to the accumulation of uremic toxins, which disrupt cellular functions across various organs.Neurologic symptomsNeurologic symptoms often arise early in CKD, as uremic toxin buildup drives changes in cognitive and motor functions. Patients frequently experience fatigue, headache, confusion, difficulty concentrating, and, in severe cases, seizures. Peripheral neuropathy commonly manifests as burning sensations in the...
01:31Essential Minerals for Bone Health
The minerals contained in all of the food we consume are essential for our organ systems. However, certain essential minerals, such as calcium, phosphorus, magnesium, manganese, and fluoride, largely affect bone health.
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
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...
01:21Tooth 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.
01:24Drug Toxicity: Dose-Dependent Reactions
Drug toxicities can be stratified into pharmacological, pathological, or genotoxic based on their mechanisms. The incidence and severity of these toxicities generally increase with the drug's concentration in the body and exposure time.Pharmacological toxicity is evident when the therapeutic effects of drugs overshoot into adverse reactions in a predictable, dose-dependent manner. Central nervous system (CNS) depression from barbiturates is a classic example, with effects escalating from...