oral anatomy lesson 4
TRANSCRIPT
ORAL ANATOMY LESSON 4
TEETH AND SUPPORTING STRUCTURES
FUNCTIONS OF TEETH: MASTICATION SHAPING OF FACE SPEECH PROTECTIVE PREHENSILE - ability to grab food
by hands
DENTAL CONSONANTS – F S & T
ANATOMICAL FEATURES:ANATOMICAL CROWN – part of the tooth covered by enamel from cervix to the tip of the crown
CLINICAL CROWN – part of the tooth that is visible in the mouth and exposed to the oral fluids
PERIODONTIUM – histologic structure of the oral cavity
ANATOMICAL ROOT – part of the tooth covered by cementum from the cervix to the apex of the root
CLINICAL ROOT – part of the tooth still implanted and surrounded by periodontium
CERVICAL LINE/CERVIX/NECK – line of separation between crown and root portion also known as CEMENTOENAMEL JUNCTION (CEJ)
DENTAL TISSUES – histologic partsTOOTH TISSUE PROPER: HARD DENTAL TISSUES –
mineralizedo ENAMEL – hard mineralized
tissue that is said to be 96-98% calcified and is the hardest tissue in the body. It is brittle, inelastic, translucent and it serves as a protective layer to the dentin
o DENTIN – a hard tissue that forms the main bulk of the tooth and surrounds the
pulp cavity. It is said to be 60-70% calcified, gives the form and shape of the tooth, light yellowish in color and is said to be slightly elastic which makes it carry the stress of mastication
o CEMENTUM – covers and protects the dentin of the roots of the tooth. Ii is 45-55% calcified, light yellowish and dull in color and is usually responsible for the repair of tooth
SOFT DENTAL TISSUES o PULP – the only soft dental
tissue of the tooth found at the innermost portion of the tooth and is said to be the only part of the tooth that is alive
o PULP TISSUE – pinkish in color, uncalcified and is made up of blood vessels, nerves and cellular substances
PARTS OF THE PULP: CORONAL PULP – part of the pulp
found at the coronal area RADICULAR PULP – part of the
pulp found at the root area
FUNCTIONS OF PULP TISSUES: NUTRITIVE FORMATIVE DEFENSIVE PROTECTIVE SENSORY
TERTIARY DENTIN – stimulation of the pulp tissues to regenerate when you put calcium hydroxide (CaOH) on top of an exposed pulp
PARTS OF PULP CAVITY: PULP CHAMBER – an enlarged
portion of the pulp cavity that lies in the ventral portion of the anatomical crown
PULP HORN – an elevation of pulp chamber on its elongated portion
PULP CANAL/ROOT CANAL – part of the pulp cavity found on the root area that is large at the cervical
part of the root and is constricted towards the apex of the root
APICAL FORAMEN – where blood and nerve supply enters and leaves the tooth
-Rosette Go 071008