max and mand denture bearing area Flashcards
what muscle attaches to the oblique line
buccinator m
border moulding is done with green compound. what is the purpose of it
muscles mold the material to show where to put the borders (up to the mucobuccal fold, gives a seal)
what muscle defines the thickness and length of the labial flange
mentalis muscle
what is the secondary support area
alveolar ridge
what is the primary support area
buccal shelf
why is the buccal shelf the best support
its parallel to the occlusal plane; bone is dense; more resistant to resorption
what is the lateral border of the buccal shelf
external oblique line
what is the external oblique line a good border for the buccal shelf
the buccinator m attaches to it so it doesnt resorb
what are the borders for the buccal shelf
buccal frenum, residual ridge, retromolar pad, external oblique line
what limits the extension of the buccal shelf
buccinator m
what do we do if the mental foramen is on the alveolar ridge
denture base should be relived to avoid nerve damage
significance of retromolar pad
- landmark for distal extension (2/3 up)
- determines height and width of occlusal table
- unchanging so a good support area
significance of retromylohyoid space
- good stability and retention
- must palpate to see if flange can be extended
what determines lingual flange extension during swallowing and tongue movements
mylohyoid ridge
