Prosthodontics Flashcards
(42 cards)
what is ICP vs RCP
ICP you need sufficient index teeth and may vary through life, sometimes more anterior than RCP
RCP is when there is not sufficient index teeth, the most reproducible position, condylar position
when are shellac bases for record blocks useful
complete dentures
why may we choose to modify survey lines on a cast and how is this achieved
achieved by addition of composite
this may be because there are no favourable undercuts on the teeth for retention of the denture and more favourable clasping
why may precision attachments be used in partial denture design
used rarely
this adds to retention of the partial denture
when is a two part denture useful
when gross tissue loss and different paths of insertion
when are swing lock dentures used
bilateral or unilateral free end saddles
if bony undercut under anterior teeth - place lingual plate and put hinge on one side and lock on other
aids retention
when there are lingually tilted teeth how would you manage a connector for this
buccal bar
how should dentures be made for bruxists
metal backing to teeth
base of cobalt chrome to reduce fracture
metal occlusal surfaces
how do you manage retching patients in the dental practice
identification of problem
identify trigger zones
anxiety reduction
patience and empathy
distraction techniques
what is the MAGIC technique for retching
main
amelioration of
gagging
indoctrination by
communication
pt fills lungs with air - brain thinks there is plenty of air and no risk of gagging or choking
what do post dams provide
pressure to palatal tissue to aid retention
how can you design a denture for a retching patient (3 aspects)
palate not too thick
cusps posterior teeth rounded
no 2nd molars
what is LIMBO for jaw registration
L - lip support nasiolabial angle should be 90 degrees
I - incisal plane - parallel to interpupillary line and lowers
M - midline in line with midline of pt’s face
B - buccal corridor
O - occlusal plane parallel to ala-tragus line
what is the maxilla edentulous anatomy
what is the mandibular edentulous anatomy
what are the three support areas in maxilla
posterior hard palate
maxillary tuberosities
ruggae
what are the three support areas in the mandible
retromolar pads
residual ridge
buccal shlef
what should you check on denture delivery
extension
- upper to vibrating line, hamular notches, into depth and width of sulcus
- lower 2/3rds across retromolar pad, into depth and width of sulcus
stability - rock occlusal surfaces side to side
retention - assess drop
occlusion
comfort
appearance
speech
what should you tell patients on delivery of a denture
normal to experience pain - like breaking in new shoes, try to persevere if too sore take out but wear for 24 hours before next appt so we can see where it’s rubbing
speech - may lisp
eating - eat with denture in
saliva - excess saliva initially but normal after 24 hours
what cleaning and hygiene instructions should you give to patient for dentures
clean outside of mouth over basin of cool water
2 x daily use of soft bristled toothbrush and non-perfumed soap
clean after each meal
thoroughly rinse after cleaning
remove denture at night - soak in water overnight
soak in products such as steradent or milton
where should rests be placed for stability/ support
bounded saddle = immediately next to saddle
free end saddle - mesial side of abutment tooth
how is retention achieved in 3 categories
mechanical - clasps in undercuts
muscular - action of patient’s muscles
physical - adhesion/ cohesion
what undercut is needed to engage CoCr clasps
0.25mm
what are the components of RPI system
mesial rest
proximal guide plate
gingivally approaching I-bar clasp
