Dental Tissues Flashcards
What is the clinical crown
The portion of the crown which is visible in the mouth
What happens to the viewing of the teeth when there is gingival recession
The clinical crown> anatomical crown
What are the ideal properties of a tooth
String Hard Water resistant Resist to chemical damage Ability to repair Aesthetic
Which structures have the most mineral, matrix, water
Mineral - enamel
Matrix - bone
Water is bone
What does enamel cover
The anatomical crown
What are some properties of enamel
Epithelial product Hydroxyapatite Translucent Hard Non vital Brittle
How is enamel arranged
In enamel prisms
What kind of burr is required to cut through enamel
Diamond or tungsten carbide
Is unsupported enamel easy to get rid of
Easy to fracture with chisel
What is dentine
Specialised connective tissue
What are some properties of dentine
Hard
Strong
Resilient
Mineral and collagen composition
What is pre dentine
Non mineralised
Beside the pulp
What direction are the collagen fibres of the dentine arranged like
Following the outline of the enamel
In dentine there are dentinall tubules
Highly tubular
Continuous with pulp
Vital
What do the dentinal tubules contain
Cellular processes
Nerves
Fluid
What is the amelodentinal junction
Between enamel and dentine
What are the ways a filling can stay in place
Mechanical undercut
Bond to enamel
Bond to dentine
If a filling is bonding to enamel what does it do
Utilise structure of enamel
Acid etch
If a filling is bonded to dentine what does it do
Acid deminalisation
Infiltrate collagen with resin
Penetrate tubules with resin
What is the dental pulp
Specialsed connective tissue
Essentially a matured dental papilla
Dentine is the calcified pulp
What are hitherto functions of the pulp
Dentine formation
Defence and repair
Sensory
What is the gross anatomy of the pulp
Pulp horns
Coronal Pulp chamber
Radicular pulp
Apical foramen
How is the dentine and pulp linked
Embryogically
Physically
Functionally
Since dentine Is porous how can this affect the pulp
Any material may irritat causing the pulp to inflame
Whilst other materials such as Ca(OH)2 is therapeutic
What is cementum
Mineralised specialised connective tissue
Covers the roots
What are the functions of the cementum
Tooth support
Resistant to resorption
What is the anatomical crown
The portion of the tooth covered in enamel
