Unit 304 Revision on Dental Anatomy Flashcards
How many parts are there to a tooth?
3 (Crown, Neck, Gingival Margin)
What is the name of the outer layer of the crown?
Enamel
What mineral crystals make up teeth?
Hydroxyapatite Crystals
What percentage of Hydroxyapatite Crystals make up Enamel?
96%
What cells make up Enamel?
Ameloblast Cells
What is the next level under the tooth after Enamel?
ADJ [Amelodentinal Junction]
What level do caries need to breach after Enamel to reach Dentine and become an established caries?
Amelodentinal Junction (ADJ)
What level of tooth comes after ADJ?
Dentine
What cells make dentine?
Odontoblast Cells
How many types of dentine are there?
2 Types, Primary and Secondary
What helps promote secondary dentine?
Calcium Hydroxide (Dycal)
What percentage of Hydroxyapatite crystals makes up Dentine?
80%
What layer comes after Dentine?
Pulp chamber
What living parts of the tooth live in the pulp chamber?
Nerves and Blood Vessels
What is the outer layer of protection for the root of the tooth?
Cementum
What percentage of Hydroxyapatite crystals make up Cementum?
60%
What cells make up Cementum?
Cementoblast Cells
What name is used for the base of the root of the tooth?
Apex
What is the opening (that allows nerves and blood vessels into teeth) at the base of the root of a tooth called?
Apical Foramen
What is the name of the socket that the root lives in?
Lamina Dura
What holds the root of a tooth in the Lamina Dura?
Periodontal Ligament
What is the name used for the bone surrounding teeth?
Alveolar Bone
How many roots does an upper molar typically have?
3 (Upper need more than lower to stay in the palate)
Which tooth is the cusp of Carabelli located on?
UPPER FIRST permanent molar (U6)
Which teeth are not found in a child dentition?
Premolars (D&E In children are molars, not premolars)
How many pairs of Cranial Nerves are there?
12
Which 4 cranial nerves are dental professionals most concerned with?
5th, 7th, 9th, 12th.
What is the 5th, (and most important) cranial nerve in dentistry?
Trigeminal nerve
What is a foramen?
Hole (or opening) that allows blood vessels and nerves to navigate through
Which nerve supplies sensation to upper central incisors?
Anterior Superior Dental Nerve (ASDN)
Which nerve supplies sensation to gingivae on the tongue side?
Lingual Nerve
Which 2 nerves are injected for a XLA of UL7?
Posterior Superior Dental Nerve (PSDN) & Greater Palatine Nerve
When scoring BPE, what does a “*” on a tooth mean?
Furcation is present (can see roots from recession)
What number GDC Principle does the complaints principle come under?
Principle 5
What are study models made of?
Gypsum (Dispose in Gypsum waste)
What material is alginate made from?
Irreversible hydrocolloid
