Tertiary dentin
Type of dentin formed in response to stimuli
Tertiary dentin is a type of dentin that forms in response to external stimuli, such as dental caries, tooth wear, or dental trauma. It is part of the tooth's natural defense mechanism to protect the dental pulp from potential damage.
Formation[edit | edit source]
Tertiary dentin is produced by odontoblasts, which are specialized cells located in the dental pulp. When the tooth is exposed to stimuli that threaten its integrity, odontoblasts are stimulated to produce tertiary dentin. This process can be triggered by various factors, including:
- Caries: The presence of dental caries can stimulate the formation of tertiary dentin as the tooth attempts to protect the pulp from bacterial invasion.
- Attrition, abrasion, and erosion: These forms of tooth wear can lead to the exposure of dentin, prompting the formation of tertiary dentin.
- Dental trauma: Physical injury to the tooth can also result in the production of tertiary dentin as a reparative response.
Types[edit | edit source]
Tertiary dentin can be classified into two main types based on the nature of the stimulus and the response of the odontoblasts:
- Reactionary dentin: This type of tertiary dentin is formed by pre-existing odontoblasts in response to mild stimuli. The odontoblasts increase their activity to produce additional dentin, which is usually similar in structure to primary and secondary dentin.
- Reparative dentin: When the stimulus is more severe, such as in the case of deep caries or significant trauma, the original odontoblasts may die. In such cases, new odontoblast-like cells differentiate from the pulp and produce reparative dentin. This type of dentin often has a more irregular structure compared to reactionary dentin.
Structure[edit | edit source]
The structure of tertiary dentin can vary significantly depending on the type and severity of the stimulus. Reactionary dentin tends to have a more regular tubular structure, similar to that of primary and secondary dentin. In contrast, reparative dentin often has a more irregular, atubular structure, which can make it less permeable and more resistant to further damage.
Function[edit | edit source]
The primary function of tertiary dentin is to protect the dental pulp from external threats. By forming a barrier, tertiary dentin helps to seal off the pulp from bacterial invasion and other harmful stimuli. This protective mechanism is crucial for maintaining the vitality of the tooth and preventing further damage.
Clinical Significance[edit | edit source]
Understanding the formation and characteristics of tertiary dentin is important in dentistry, particularly in the diagnosis and treatment of dental caries and other forms of tooth damage. The presence of tertiary dentin can indicate a history of tooth stress or damage and may influence treatment decisions.
Related pages[edit | edit source]
Search WikiMD
Ad.Tired of being Overweight? Try W8MD's physician weight loss program.
Semaglutide (Ozempic / Wegovy and Tirzepatide (Mounjaro / Zepbound) available.
Advertise on WikiMD
WikiMD's Wellness Encyclopedia |
Let Food Be Thy Medicine Medicine Thy Food - Hippocrates |
Translate this page: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
தமிழ்,
తెలుగు,
Urdu,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
বাংলা
European
español,
Deutsch,
français,
Greek,
português do Brasil,
polski,
română,
русский,
Nederlands,
norsk,
svenska,
suomi,
Italian
Middle Eastern & African
عربى,
Turkish,
Persian,
Hebrew,
Afrikaans,
isiZulu,
Kiswahili,
Other
Bulgarian,
Hungarian,
Czech,
Swedish,
മലയാളം,
मराठी,
ਪੰਜਾਬੀ,
ગુજરાતી,
Portuguese,
Ukrainian
Medical Disclaimer: WikiMD is not a substitute for professional medical advice. The information on WikiMD is provided as an information resource only, may be incorrect, outdated or misleading, and is not to be used or relied on for any diagnostic or treatment purposes. Please consult your health care provider before making any healthcare decisions or for guidance about a specific medical condition. WikiMD expressly disclaims responsibility, and shall have no liability, for any damages, loss, injury, or liability whatsoever suffered as a result of your reliance on the information contained in this site. By visiting this site you agree to the foregoing terms and conditions, which may from time to time be changed or supplemented by WikiMD. If you do not agree to the foregoing terms and conditions, you should not enter or use this site. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates, categories Wikipedia, licensed under CC BY SA or similar.
Contributors: Prab R. Tumpati, MD