Dental Anatomy (Muscles & Salivary Glands) Flashcards
How many Muscles of Mastication are there?
4
What are the 2 primary muscles of mastication we need to know?
Temporalis Muscle & Masseter Muscle
What are the 2 muscles of mastication we do not need to know so well?
Medial & Lateral Pterygoid
What bone does the temporalis muscle attach to?
Coronoid Process
Placing a finger in front of your ear and opening the mouth, which bone do we feel?
Condile
Which dip forms between the Condile & Coronoid Process?
Sigmoid Notch
What is the function of the Temporalis muscle?
Closes and pulls the jaw backwards
What is the function of the Masseter muscle?
Closes the mandible
Which bone is the Masseter muscle attached to?
Zygomatic arch (cheekbone)
What do the Medial & Lateral Pterygoid muscle do?
Move jaw side to side
Do we use muscles to open our mouthes?
No. Muscles keep the mouth closed
Which muscle surrounding the eye, moves the eyelids?
Orbicularis Oculi
Which muscle surrounding the mouth, moves the mouth/lips?
Orbicularis Oris
Which muscle helps move food to the posterior of the mouth?
Buccinator Muscle
What is the name for the bumps at the roof of the mouth, (that help the buccinator muscle move food?)
Rugae
How many pairs of Salivary Glands do we have?
3 (Parotid, Submandibular, Sublingual)
Which duct works with the Parotid Gland?
Stenson’s Duct
Which Duct works with the Submandibular Gland?
Whartons Duct
Which Duct works with the Sublingual Gland?
Bartholin/Rivinus Duct
Which Gland is the biggest?
Parotid Gland (sits over the Ramus)
Where is the Submandibular Gland situated?
Below the Sublingual Gland
Where is the Sublingual Gland situated?
Behind lower anteriors
How much Saliva does the Parotid Gland produce?
25%
How much Saliva does the Submandibular Gland produce?
70%
How much Saliva does the Sublingual Gland produce?
5%
What happens when saliva hits plaque?
It Calcifies
What percentage of Saliva, is water?
99% (99.5)
What is 0.5% of saliva made up of?
Dissolved Substances
What 4 Main dissolved substances make up 0.5% of saliva?
Proteins, Inorganic Ions, Antibodies, Enzymes (ptyalin)
What do Enzymes in saliva do?
Break down food, aid in healing
What makes saliva sticky?
Mucin (comes from proteins in saliva)
What causes caries?
Bacteria + Sugar [= Acid]
What drops when bacteria and sugar combine in the mouth, and can cause demineralisation, (leading to caries)
PH level drops due to acid
What can help remineralise teeth?
Minerals
What is the name of the ‘Action’ that neutralises the mouth, and balances PH?
Buffering Action
What is the name of the small cyst that can be caused by saliva build up/duct blockage?
Mucocele
What gland swelling can cause mumps?
Parotid Gland
