chapter 1 Flashcards
what is ala
Ala is the winglike tip of the outer side of each nostril.
where is the philtrum located ?
center external surface of the upper lip
where is symphysis located
in the center of the mandible forms the chin.
what are of the two areas does the oral cavity consist of
- Vestibule.
- Oral Cavity Proper
what is the vestibule area
is the part of the mouth bounded anteriorly and laterally by the lips and the cheeks
where does the oral cavity begin and end
begins at the teeth and extends to the palatine tonsils.
what is the frenum
is a narrow band of tissue that connects two
structures.
what is the labial frenum
passes from the midline of the maxillary or mandibular arch to the midline of the inner surface of the lip
what is the buccal frenum
passes from the oral mucosa near the max and mand canine to the inner surface of the cheek
pear-shaped pad of tissue located behind the maxillary central incisors.
Incisive papilla
irregular ridges of masticatory mucosa extending laterally from the incisive papilla.
Palatal rugae
runs posteriorly from the incisive papilla at the midline.
Palatine raphe
Palatal glands
are numerous small glands that open onto the palatal mucosa as small pits.
the movable softer part at the back of the palate.
The Soft Palate
The anterior arch or pillar arch or
runs from the soft palate down to the lateral aspects of the tongue
the palatoglossal arch.
The posterior arch or pillar is the free posterior border of the soft palate
palatopharyngeal arch.
: largest papillae, posterior of the tongue- sense bitter taste.
Circumvallate
: smallest papillae, cover the entire surface of the tongue- do not sense taste.
Filiform
dark-red papillae on the middle, sides and anterior of the tongue-sense sweet, salty and sour.
Fungiform
located on the posterior lateral borders, easily seen if the tongue is grasped and extended with a gauze-sense sour taste.
Foliate
The portion of the tooth that is visible in the oral cavity is
crown.
is the largest of the three glands, produces 25% of the total volume of saliva and passes into the mouth via the parotid duct or Stensen’s duct.
Parotid gland
: this is about the size of a walnut and is the second largest. It produces about 60-65% of the total saliva and passes via the submandibular duct or Wharton’s duct.
Submandibular salivary gland
this is the smallest of the three and provides only 10% of the total saliva. It passes saliva through the sublingual duct or Bartholin’s duct.
- Sublingual salivary gland
The permanent dentition is divided into four types of teeth
- Incisors
- Canines or cuspids
- Premolars
- Molars
how teeth are arranged into
Arches
Quadrants
Sextants
When the maxillary and mandibular arches are each divided into halves, there are 4 sections, which are called
quadrants.
There are three tooth numbering systems
Universal/National Numbering System
International Standards (FDI)
Palmer Notation System
The teeth are made up of four main parts:
Enamel
Dentin
Pulp
Cementum
Hard white covering over the tooth
Enamel
Main tissue of tooth that surrounds the pulp
Dentin
Soft tissue found in the center of tooth
pulp
Rough tissue that covers the root of tooth
Cementum
Anatomic features of the teeth help maintain their positions in the arch and protect the tissues during mastication (chewing). These features include
Contours
Contacts
Embrasures
The periodontium is made up of a variety of tissues that provide anchorage, support, and protection for the teeth in the dental arches.
Periodontal Ligament
Alveolar Bone
Gingiva
Cementum
Attachment apparatus
Gingival unit
The periodontium is divided into 2 major units:
are responsible for the formation of bone.
Osteoblasts
cells that destroy or cause the resorption of bone tissue
Osteoclasts
Is the portion of the tooth that we can see in the oral cavity
cementoenamel junction or cervical line
means that the tooth is divided into two roots
Bifurcation
means that the tooth is divided into three roots.
- Trifurcation
The tapered end of each root tip is known as the
Apex
covers the anatomic crown of the tooth, and is the hardest material in the body
Enamel:
enamal is formed by ?
ameloblasts
what is the dentin covered by
enamel on the crown and by cementum on the root.
Dentin is more yellow in the primary teeth.
true or false
Dentin is formed by
odontoblasts
This is also known as the reparative dentin. It acts as a protective layers against irritation tries to protect the pulp.
Tertiary
: begins after the tooth is erupted and continues to grow throughout the life of the tooth and wear and tear.
Secondary
is formed before the tooth is erupted and makes up the bulk of the tooth
Primary
The pulp is formed from
Fibroblasts
The part of the pulp that is in the crown portion of the tooth
Pulp chamber.
What happens to the pulp as we age?
it shrinks
covers the root of the tooth
Cementum
The cementum is formed from
Cementoblasts
odontogenesis.
The process of tooth formation
This process can be divided into three primary periods
. Growth period
. Calcification period
Eruption period
:This is also known as initiation or the beginning stages of tooth development.
Bud stage
The tooth bud begins to grow and is starting to take on the appearance of a cap.
. Cap stage
Also called histodifferentiation. At this stage the enamel, dentin, and pulp are being formed.
bell stage
It the movement of the tooth into its functioning place in the mouth. It starts when root formation begins
Eruption
Permanent teeth that replace primary teeth is called
Succedaneous teeth.
Is the normal process by which the primary teeth are lost.
Exfoliation or Shedding
What is Intraoral scanning?
Scanning in the mouth, of the teeth and surrounding structures using a device which projects a light source, usually laser or structured light, onto the dental arches to capture a direct optical and digital impression
How do intraoral scanners work
An intraoral scanner consists of a handheld wand, a computer, and software
The small wand is connected to a computer that runs custom software that processes the digital data sensed by the device
(CAD)
computer aided design
(CAM)
computer aided manufacturing