What is primary dentin?
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Dentin that extends from the pulp chamber to the enamel, produced before root formation is completed.
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What is primary dentin?
Dentin that extends from the pulp chamber to the enamel, produced before root formation is completed.
When is secondary dentin produced?
After root formation is completed.
What does the dental papilla form?
Dental pulp and pre/odontoblasts.
What are the sets of teeth that appear first in a person's life?
Baby, milk, or primary deciduous teeth (dentes decidui).
What type of cementum contains cementocytes?
Cellular cementum.
What is the primary consequence of a lack of vitamin C?
Scurvy.
What does ectomesenchyme differentiate into?
Dental sac and dental papilla.
What type of cells produce dentin?
Odontoblasts, which are special fibroblasts.
What is gum (gingiva) a part of?
Oral mucosa.
What are Striae of Retzius in enamel histology?
They are almost parallel to the surface of the enamel.
What structures develop from the dental sac?
Alveolar bone, periodontal ligament, and cementum.
What effect does secondary dentin have on the pulp chamber over time?
It causes a decrease in the size of the pulp chamber with age.
What does cementum cover?
The dentin of the root.
What is the role of cementum in the supporting tissues?
It helps anchor the tooth to the alveolar bone.
How can scurvy be prevented?
By ensuring adequate intake of vitamin C through diet.
What is the shape of the keyhole in the context of enamel formation?
Keyhole shape.
What is the epithelial body of Malassez?
A remnant of Hertwig’s root sheath that plays a role in periodontal health.
What is the function of the root canal in a tooth?
It houses the dental pulp and nerves.
What can baby teeth indicate about a child's health?
They can provide insights into autism and heavy metal exposure.
How many deciduous teeth are there in each quadrant?
5 deciduous teeth.
What is permanent dentition?
The set of teeth that replaces primary teeth and remains in the mouth for a lifetime.
At what age do mesial incisors typically erupt?
7 months.
What is the chemical formula for fluorapatite?
Ca5(PO4)3F.
What is the basic unit of tooth enamel?
Enamel rods (prisms).
What is the primary function of dentin?
It forms most of the tooth substance and surrounds the pulp chamber.
What are cementoblasts?
Cells responsible for the formation of cementum on the tooth root.
What tissues make up the parodontium?
Cementum, alveolar bone, periodontal ligament, and gingiva.
What are secretory granules?
Cellular structures involved in the secretion of enamel matrix proteins.
What are the names of the molars?
Dentes molares.
At what age does the first molar tooth erupt?
6 years.
What is the role of the ectomesenchyme in tooth development?
It interacts with the ectoderm of the oral cavity to facilitate tooth formation.
What is the focus of the study in the Department of Anatomy regarding teeth?
Histology and development of teeth.
What occurs after the membrana praeformativa appears?
Differentiation of odontoblasts.
What is interglobular dentin?
A hypomineralized area in the neck, also known as Tomes granulation artifact.
What are the supporting tissues of the teeth collectively called?
Parodontium.
What are some symptoms of scurvy?
Symptoms include bleeding gums, weakness, and fatigue.
Where are Tomes fibers located?
In dentin tubules.
What is predentin?
Dentin that has not yet mineralized.
How does fluorapatite compare to hydroxyapatite in terms of hardness?
Fluorapatite is harder than hydroxyapatite (HA).
What shape do enamel rods resemble?
Keyhole shape.
How many types of permanent teeth are there in a quadrant?
5 types: 2 incisors, 1 canine, 2 premolars, and 3 molars.
What is the periodontal ligament?
A connective tissue structure that attaches the tooth to the alveolar bone.
What are the names of the premolars?
Dentes premolares.
What is the composition of enamel?
95% inorganic substances, 1% organic substances (no collagen), and 4% water.
What is the Membrana praeformativa?
A basement membrane that lies between the inner enamel epithelium and odontoblasts.
What is the characteristic of cementum found near the neck of the tooth?
It is cell-free cementum, also known as acellular cementum.
How is the gum (gingiva) attached?
Firmly attached to teeth and alveolar bone.
What do odontoblasts secrete towards the membrana praeformativa?
Predentin.
What is another name for deciduous dentition?
Milk teeth (denters decidui).
Is it normal for dogs to smile when greeting people?
Yes, it is a normal behavior for dogs.
How many permanent teeth are there in each quadrant?
8 permanent teeth.
What is peritubular dentin?
Dentin with high inorganic content and less organic material.
What are the structural features of enamel?
It has 5 μm thick, long, parallel columns with a wavy course.
What are the two types of incisors in a quadrant?
Medial and lateral incisors.
What is the eruption age for canine teeth?
12 years.
What are odontoblasts?
Cells that form dentin in the tooth.
When do second molar teeth typically erupt?
12 years.
What are cementocytes and where are they found?
Cementocytes are cells found in lacunae, derived from cementoblasts.
What are the two types of cementum mentioned in the histology of cementum?
Cellular cementum and acellular cementum.
Why is vitamin C important for the body?
It is needed for collagen synthesis.
What are the components of the enamel organ involved in root development?
Outer and inner enamel epithelium.
What triggers the production of tertiary dentin?
External stimuli.
How many quadrants are there in the dental structure?
Four quadrants.
What percentage of dentin is inorganic?
70%.
What are the types of permanent teeth?
Incisors, canines, premolars, and molars.
At what age do permanent teeth typically begin to erupt?
Around 6 years of age.
What type of cells are adamantoblasts and where do they originate from?
Adamantoblasts are derived from ectoderm.
At what age do mesial incisors erupt?
7 years.
Which structure develops enamel and when does it develop in relation to dentin?
Enamel is developed by adamantoblasts and forms later than dentin.
When does the second premolar tooth typically erupt?
11 years.
What do Hunter-Schreger lines represent in enamel?
They are radiating lines to the surface of the enamel.
What are teeth (dentes)?
Hard structures in the oral cavity of vertebrates.
How many dental arches are there?
Two dental arches: maxillary and mandibular.
What type of teeth do blue view sharks have?
They have unique teeth adapted for their feeding habits.
What is the process of enamel formation called?
Amelogenesis.
What is the marginal dentin?
The outermost layer of dentin, which is less inorganic and contains branches of Tomes fibers.
What is the function of the periodontal ligament?
It provides proprioception and aids in tooth eruption.
What is the maximum thickness of enamel?
2.5 mm.
Does enamel contain cells?
No, it has no cells.
What is the last type of permanent teeth to erupt?
Wisdom teeth (third molars).
What is the role of the root sheath in the supporting tissues?
It is involved in the formation of the periodontal ligament.
Which forms first, enamel or dentin?
Dentin forms before enamel.
What do inner enamel epithelium cells differentiate into?
Ameloblasts (also known as adamatoblasts).
What is predentin?
The unmineralized layer of dentin that precedes the formation of mature dentin.
What are the morphological parts of a tooth?
Root canal and foramen of root canal.
What is the foramen of the root canal?
The opening at the tip of the root canal where nerves and blood vessels enter.
What is the role of the enamel organ in root development?
The margin of the enamel organ grows into the deep and forms the epithelial root sheath.
What type of resources are linked in the provided content?
Links to Pinterest and a health website about tooth anatomy.
What is the first step in the development of the dental crown?
The appearance of the membrana praeformativa.
What is another name for the epithelial root sheath?
Hertwig’s root sheath.
What is intertubular dentin?
Dentin located between tubules, characterized by parallel collagen fibers and hydroxylapatite crystals.
What is the composition of dentin?
70% inorganic (hydroxylapatite), 20% organic (type 1 collagen, GAG, proteoglycans), and 10% water.
What surrounds the enamel organ?
Basement membrane adjacent to the inner enamel epithelium.
What additional function do teeth serve in humans?
Communication.
What is the chemical formula for carbonated hydroxyapatite?
Ca10(PO4)6CO3.
What is the significance of Tomes process in amelogenesis?
It is involved in the formation of enamel.
What are ameloblasts?
Cells that form the inner enamel epithelium and produce enamel.
At what age does the first premolar tooth erupt?
10 years.
What occurs between 8 to 17 weeks of pregnancy regarding the dental lamina?
Ten primordia of milk teeth form at the free margin of the dental lamina in each jaw.
What is a notable feature of Nelly's teeth?
He is known for wearing grillz.
What condition is characterized by symptoms related to collagen deficiency?
Scurvy.
What are the sets of teeth that replace deciduous teeth?
Permanent teeth (dentes permanentes).
What is produced by ameloblasts during dental crown development?
Enamel.
What is the outer layer of the crown of a tooth called?
Enamel (enamelum, substantia adamantina).
What is the thickness range of cementum?
100 - 500 μm, thicker towards the apex.
What shape is associated with the enamel formation process?
Horseshoe shape.
What type of images are used to illustrate enamel rod structure?
SEM (Scanning Electron Microscopy) images.
What type of cells are odontoblasts and where do they originate from?
Odontoblasts are derived from ectomesenchyme.
What is the primary function of adamantoblasts?
To form enamel.
What do ameloblasts secrete?
Enamel.
What is located between the inner enamel epithelium and odontoblasts?
The dental papilla.
What are the main parts of the enamel organ in the bell stage?
Outer and inner enamel epithelium.
What connects the enamel organ to the surface epithelium?
Dental lamina.
What are the primary functions of teeth?
Capturing prey, breaking down food, and defense.
What type of cells are adamantoblasts derived from?
Ectoderm.
What type of cells are odontoblasts derived from?
Ectomesenchyme.
Is cementum produced throughout life?
Yes, it is produced throughout life.
What is the function of stratum intermedium in enamel histology?
It assists ameloblasts in enamel formation.
What is the role of odontoblasts in tooth development?
Odontoblasts are responsible for dentin secretion.
What is the hardest compound in the human body?
Enamel.
What is the dental lamina?
A thickening of surface epithelium in the oral cavity that interacts with ectomesenchyme.
What are odontoblasts?
Cells responsible for the formation of dentin.
What are Tomes fibers?
Long, branched processes produced by odontoblasts found in dentin tubules.
What is the next stage after the secretion of predentin?
Differentiation of secretory-stage ameloblasts.
What is the first stage of tooth development?
Bud stage.
Who is associated with the study of enamel origin in histology?
Welsch.
When do lateral incisors usually erupt?
8 months.
What is the eruption age range for canine teeth?
16 to 20 months.
What are the stages of dental crown development?
Bud stage, cap stage, and bell stage.
What is found between the enamel prisms?
Interprismatic enamel.
What are Sharpey's fibers?
Collagen fibers that insert into cementum.
What is the sequence of development for enamel and dentin?
Dentin develops before enamel.
What is the function of the stellate reticulum in tooth development?
It supports the developing enamel organ.
What is the dental papilla?
The tissue that gives rise to the dental pulp and dentin.
What type of epithelium is found in the gum (gingiva)?
Stratified squamous non-keratinizing epithelium.
What is the primary function of odontoblasts?
To produce dentin.
What is the function of the stellate reticulum in the enamel organ?
It consists of loose cell groups and wide spaces.
What happens to odontoblast cell bodies during dentin formation?
They move away from the membrana praeformativa.
What is Hertwig’s root sheath?
A structure involved in the development of the dental root.
What do the cells of the enamel organ form?
Stratum intermedium.
What is the distance between cementum and alveolar bone?
200 μm.
How does the hardness of dentin compare to bone?
Dentin is harder than bone.
How is one enamel prism produced?
By one ameloblast, which disappears during eruption.
What is the primary function of odontoblasts?
To form dentin.
What is the primary mineral found in enamel?
Calcium hydroxylapatite crystals (HAp/HA).
What are pre/odontoblasts?
Peripheral, epithelial-like cells next to the inner enamel epithelium.
What is another name for the dental sac?
Dental follicle.
What is dental caries commonly known as?
Tooth decay.
How many permanent teeth does an adult typically have?
32 permanent teeth.
Where is the apical part of Tomes fibers attached?
To the dentinoenamel junction.
What are Sharpey's fibers?
Collagen fibers that connect cementum with alveolar bone and gingiva.
When do first molar teeth typically erupt?
12 to 14 months.
How does carbonated hydroxyapatite compare to fluorapatite in terms of resistance to demineralization?
Carbonated hydroxyapatite is less resistant to demineralization.
What are the main components of cementum?
61% inorganic, 27% organic (collagen fibrils, proteoglycans), and 12% water.
What is the name of the canine tooth?
Dens caninus.
What is dentin?
The layer beneath enamel, providing structure and support to the tooth.
What are enamel organs?
Primordia of permanent teeth that appear alongside the milk teeth.
What are the two types of dental arches called?
Arcade dentalis superior (maxillary) and arcade dentalis inferior (mandibular).
What are Tomes fibers?
Extensions of odontoblasts that remain in dentinal tubules.
What stage follows the bud stage in tooth development?
Cap stage.
What type of collagen is found in the organic component of dentin?
Type 1 collagen.
Who secretes cementum?
Cementoblasts, which have a mesenchymal origin.
What is the role of stellate reticulum in enamel production?
It provides support and nourishment to the developing enamel.
At what age do second molar teeth usually erupt?
24 to 30 months.
Who continuously produces dentin?
Odontoblasts.
What are alveolar cells?
Cells that form the alveolar bone, providing support for teeth.
What is enamel?
The hard outer layer of a tooth, primarily composed of hydroxyapatite.
What shape does the dental lamina take?
Horseshoe-shaped.
What is the labial lamina?
A proliferation of ectoderm cells from the dental lamina that later disappears.
What is the dental follicle?
A structure that surrounds the developing tooth and contributes to the formation of the periodontal ligament.
What is the final stage of tooth development?
Bell stage.
When do lateral incisors typically erupt?
9 years.
What is the role of bone in dental development?
It provides structural support for the teeth through the alveolar process.
When does the dental lamina begin to form during pregnancy?
In the 5th week of pregnancy (2nd month).
What is the eruption age range for third molar teeth?
18 to 24 years.
