PRELIMS: PARTS OF A TOOTH & ITS SURROUNDING STRUCTURES Flashcards
Part of the tooth covered by enamel, and extends from the occlusal surface to the cementoenamel junction
ANATOMICAL CROWN
Part of enamel visibly present in the oral cavity
Visible portion of the tooth occlusal to the deepest part of gingival crevice
CLINICAL CROWN
Portion of tooth covered with cementum
ANATOMICAL ROOT
Portion of tooth not visible in the mouth
CLINICAL ROOT
Hard, mineralized tissue that covers the dentin of the anatomical crown of the tooth.
It is the hardest, calcified body tissue, but is brittle when not supported by the underlying dentin
ENAMEL
Enamel forming cell that is present only during tooth development
AMELOBLAST
Hard tissue that forms the main body of the tooth surrounding the pulp cavity
It constitutes the bulk of the tooth but it is not directly visible in a normal tooth
DENTIN
What covers the dentin in the anatomical crown?
ENAMEL
What covers the dentin in anatomical root?
CEMENTUM
Functions of dentin
~SUPPORTS TOOTH ENAMEL
~ABSORBS PRESSURE OF EATING
Dentin forming cells that are tall columnar cell located at the periphery of the dental pulp
It is derived from ectomesenchymal cells originated by migration of neural crest cells during craniofacial development
ODONTOBLAST
A layer of hard, bone-like, thin calcified layer of tissue which covers the dentin of the anatomical root.
It is attached to the bone of the jaw with little elastic fibers and is the only tissue considered as both a basic part of the tooth and a component of periodontium.
It is formed during the development of the root and functions as an area of attachment for periodontal ligament fibers
CEMENTUM
Cementum forming cells derived from the dental follicle.
It has numerous mitochondria, a well formed golgi apparatus and large amount of granular endoplasmic reticulum
CEMENTOBLAST
The identifiable line around the external surface of a tooth where the enamel and cementum meet. It separates the anatomical crown and anatomical root.
It is located in the general area of the tooth spoken as the neck or cervix
CERVICAL LINE
Other term used for the cervical line
CEMENTO-ENAMEL JUNCTION
The internal line of meeting of the dentin and enamel in the anatomical crown
DENTINO-ENAMEL JUNCTION
The living soft tissue which occupies the pulp cavity of a vital tooth and contains the nerves and vessels that nourishes the tooth.
It is the most internal structure of a tooth, surrounded by dentin
It can be found in the soft center of the tooth, inside the pulp chamber and root canal
PULP
A small opening of the apex that is considered as a natural opening found at the tooth’s very tip where artery, vein, and nerve enters the tooth and comingle with the pulp
APICAL FORAMEN
Supporting tissues of the teeth
PERIODONTIUM
Components of Periodontium
~ALVEOLAR PROCESS
~PERIODONTAL LIGAMENT
~CEMENTUM
~GINGIVA
Portion of the maxillae or mandible in which the roots of the teeth are embedded and by which tooth roots are supported
ALVEOLAR PROCESS
A compact layer of bone on the bone surface
OUTER CORTICAL PLATE
A thin, dense layer of bone that lines tooth socket
LAMINA DURA
Less dense, cancellous bone representing the alveolar process
SPONGY BONE
A thin, fibrous ligament connecting a tooth to the lamina dura of the bony socket.
PERIODONTAL LIGAMENTS
TRUE OR FALSE:
The fibers of the periodontal ligament acts as a shock absorber to cushion the force of chewing impacts
TRUE
A specialized mucous membrane that covers the alveolar process encircling the necks of the tooth
GINGIVA
What ae the functions of gingiva?
~AIDS IN THE SUPPORT OF TEETH
~PROTECTS THEALVEOLAR PROCESS AND PERIODONTAL LIGAMENT FROM BACTERIAL INVASION
What is the characteristic of a healthy Gingiva?
HEALTHY GINGIVA IS PALE PINK, FIRM, AND RESILIENT
Types of gingiva
~FREE GINGIVA
~ATTACHED GINGIVA
The type of gingiva that is free to the extent that it can be displaced.
It is not tightly bound to anything underneath it.
It extends from the gingival crest to the bottom of the gingival sulcus
FREE GINGIVA
What is the function of free gingiva?
HELP PREVENT FOOD FROM PACKING BETWEEN THE TEETH
What joins the free gingiva to the tooth surface at the bottom of the sulcus
EPITHELIUM ATTACHMENT
The portion of the free gingiva that fills the proximal space below the contact area of adjacent teeth
INTERDENTAL PAPILLA
The gingiva that covers the labial cortical plate of the alveolar process that is firmly fixed under the bone
ATTACHED GINGIVA
