midterm1; fdp provisional

Question 1

where would a sanitary/hygienic pontic be used

Answer 1

posterior mandible
-nonesthetic zone
contraindication; esthetics matter, minimal vertical dimension

Question 2

when do you use a saddle/ridge lap

Answer 2

never

its esthetic but not good for hygiene

Question 3

when would you use a conical pontic? contraindication?

Answer 3

molars without esthetic requirements

• good for hygiene but poor esthetics
• posteruir areas where esthetics is minimal concern

contraindication- poor oral hygiene

Question 4

when should a modified ridge lap be used?

Answer 4

• esthetic requirement (anterior teeth, premolars and some maxillary molars)
• pretty easy to clean
• good for esthetic areas usually
• contraindicated if minimal esthetic concern

Question 5

when would ovate pontic be used? disadvantages/contraindication?

Answer 5

high esthetic requirement like maxillary incisors, canines and premolars’

• superior esthetics, negligible food entrapment. easy to clean.
  disadvantages: necessitates surgical preparation not for residual ridge defects
• (optimal esthetic desire= indication)
• contraindication= patient is unwilling to do surgery, or if residual ridge defects

Question 6

when would modified ovate be used for pontic? contraindications and indications

Answer 6

-for very high esthetic needs, max incisors canines and premolars
-superior esthetics , negligble food entrapment and easy to clean.
requires surgery
-indications; where horizontal ridge width is not sufficient for a conventional ovate pontic
-contraindication: patients unwilling to undergo surgery

Question 7

whats class 0 residual ridge?

Answer 7

proper contour and morphology, smooth.
regular surface of attached gingiva. facilitate maintained of plaque free environment. no loss of bone in heihg tna dwidth should allow placement of a pontic that appears to emerge from ridge- mimics appearance of adjacent teeth! free of Frenum attachment.

Question 8

whats a class I residual ridge

Answer 8

facio-lingual loss of tissue width (F/l) with normal ridge height. horizontal bone loss

Question 9

whats a class II residual ridge

Answer 9

loss of ridge height with nomral ridge width (f/l)! vertical bone loss

Question 10

whats a class III residual ridge?

Answer 10

combination of loss both horizontal AND vertical

-in esthetic region would use surgical modification- soft or ard tissue. hard tissue for implants.

Question 11

whats a class I residual ridge modification?

Answer 11

soft tissue is removed from palatal. flap is rolled to enhance ridge growth
(other techinques, inter positional graft, pouch technique..?)

Question 12

what is the graft material for sockets called

Answer 12

allograft- hydroxyapatite or freeze dried bone

Question 13

what can a loss of residual ridge lead to

Answer 13

• unaesthetic open gingival embrasures;
• black triangles
• food impaction
• percolation of saliva during speech