part 2 - prosthodontics

Question 1

order of steps in crown prep

Answer 1

1. confirm case is back from lab
2. seat patient and update history, explain procedure
3. place topical anesthetic
4. remove provisional crown
5. cleaned with pumice
6. rinse and dry tooth
7. permanent casting is placed
8. occlusion is elevated
9. interproximals are assessed
10. tooth is isolated
11. cement is mixed and placed
12. excess cement is cleaned
13. give post op instructions

Question 2

instruments required for cord packing

Answer 2

• basic three
• cotton rolls
• cord packing instrument
• pif
• gauze
• gingival retraction cord
• scissors

Question 3

cord packing procedure

Answer 3

• isolate tooth
• cut retraction cord
• place in loop around teeth
• leave in place for 5-7 minutes
• take impressions
• document

Question 4

components of a dental bridhe

Answer 4

unit
- described by number of the teeth involved in fabrication

pontic
- artificial tooth; part of bridge that replaces more than one tooth

abutment
- natural tooth that serves as support

Question 5

retention aids for endodontically treated and vital teeth

Answer 5

retention pins - add strengths for core buildup

core buildup - supports cast crown and provides larger area of surface retention

post and core - provides strength and stability

Question 6

burs used in crown and bridge prep procedure

Answer 6

• diamond
• discs

Question 7

cad/cam procedure

Answer 7

Pic shade of ceramic

Patient is anesthetized

Cotton rolls or dental dam is placed to control moisture

Tooth and surrounding teeth are powdered with optispray

All caries and existing restos are removed

Tooth is rinsed, dried and isolated

Gingival retraction is placed

Prep is cpated with otispray

Digital impression is taken

Outline of new resto is drawn on screen

Contacts and anatomy is viewed

Computer is instructed to mill resto

Onlay is tried and adjusted

Tooth prep is etched, rinsed and dried, and bonding agent is qpplied

Cement is placed on film

Resto is cemented

document

Question 8

post and core buildup steps

Answer 8

• post is cemented into pulp chamber
• canal is enlarged
• post is placed deeply in canal
• once post is cemented. core is built around it

Question 9

purpose of bite registration

Answer 9

provides an accurate registration of the patients centric relationship between max and mand arches

Question 10

what is a 3/4 crown

Answer 10

it does not cover then entire anatomical portion of the tooth

Question 11

purpose of tray adhesive and duration

Answer 11

helps ensure that an impression remains attached to tray upon removal
- should be placed on tray at least 15 minutes before use

Question 12

what are overdentures

Answer 12

full denture that is supported by two or more remaining natural teeth

Question 13

why would final impression be taken and what is needed to be seen in a final impression when making a cud

Answer 13

taken to produce the exact detail of the teeth and surrounding tissues

hamular notches, max tuberosities and frenum attachments

Question 14

components of partial denture and their purpose

Answer 14

framework - metal skeleton that provides support

connectors - joins the various parts of partial denture

retainer - directly supports and provides stability to partial denture

rest - controls the seating of a prosthesis

artificial teeth

Question 15

purpose of relining a denture

Answer 15

to create a perfect fit on dentures that are loose

Question 16

different types of implants

Answer 16

endosteal
- surgically placed into bone
subperiosteal
- metal fram placed under periosteum, on top of bone
transosteal
- inserted through inferior border of mandible