PLANNING FOR CROWNS AND BRIDGES

Question 1

crown

Answer 1

an indirect extra coronal restoration that replaces missing tooth structure and restores form function and aesthetics

Question 2

indications for crowns

Answer 2

compromise structure
tooth surface loss
hypoplastic conditions and atypical shape
to alter and correct occlusion
part of another restortion
restore missing function
appearance

Question 3

contraindications of crowns

Answer 3

• other more conservative restorative options are viable
• poor and unstable oral hygiene
• compromise structure with a very poor prognosis eg very broken down tooth and caries extending sub gingivally
• lack of retention or resistance form
• active and unstable perio disease (tooth may deteriorate further)
• endodontic (untreated) disease (or If endo has compromised the tooth structure)
• active and unstable caries

Question 4

planning for crowns

Answer 4

comprehensive assessment
critical thinking and decision making
planning of clinical and lab stages

Question 5

tooth status to assess

Answer 5

disease status (endo, perio, caries, restorative)
structural status
restorative status
strategic importance
occlisal considerations

Question 6

mouth condition to asses

Answer 6

plaque calculus and inflammation
risk factors. - plaque control sugar intake ect
status of other teeth
soft tissue conditions

Question 7

aesthetics to consider

Answer 7

colour 
contour
outline
symmetry 
proportion
soft tissue harmony

Question 8

endodontic status

Answer 8

sensibility prior to crown prep
preoperative periapical radiograph
assess size and depth of current restorations

Question 9

occlusion

Answer 9

role of tooth
- does it provide contact
provide guidance
important in posterior support?

Question 10

periodontal factors

Answer 10

assess
level of disease status
level of support
risk factors and control of these

Question 11

conformative vs reorganisation approach

Answer 11

conform to exhisting occlusal rx in ICP

recognise to new occlusal relationship in RCP - all tooth contacts resegined

Question 12

bridge

Answer 12

tooth borne indirect fixed prothesis which is used for the replacement of one or more missing teeth

Question 13

indications for bridges

Answer 13

replacement of missing teeth and restoration of edentulous areas

Question 14

reasons for tooth loss

Answer 14

caries
perio D
trauma
hypodontia
tooth wear/TSL
oral cancer
iatrogenic

Question 15

types of bridges

Answer 15

fixed fixed
fixed movable
full coverage cantilevered
resin bonded cantilevered
implant retained

Question 16

planning for the partially dentate options to restore

Answer 16

no prosthetic treatment
RPD
conventional tooth supported RPD
implant supported RPD
bridge

Question 17

risk of no prosthetic treatmetn for partially dentate

Answer 17

over eruption and tiliting of the adjacnet teeth