Prosthodontics (Abi Nader)

Question 1

Four causes of abnormal dentition

Answer 1

• Caries
• Periodontal diseases
• Trauma
• Genetics (congenitally missing teeth)

Question 2

Abnormal dentition leads to:

Answer 2

• loss of tooth substance

- loss of dentition (partial or complete)

Question 3

Abnormal dentition causes two impairments:

Answer 3

• Function

- Esthetics

Question 4

Edentulism causes:

Answer 4

• physical impairment
• disability
• may cause handicap

Question 5

Three goals of restorative dentistry

Answer 5

• Eliminate infection
• Restore esthetics
• Restore function with dental prostheses (artificial substitute)

Question 6

Prosthesis vs. Prosthetics

Answer 6

Prosthesis is the artificial substitute for the replacement of missing parts of the body

prosthetics is the art and science of replacing missing parts of the body

Dental prosthetics (aka Prosthodontics) is the branch of dentistry peertaining to restortion and maintenance of oral function by artifical devices

Question 7

intra-coronal vs. extra coronal restorations

Answer 7

dental filling is intra coronal (deriving retetnion from external walls of remaining tooth)

crown or cap is extra-coronal

Question 8

Intra-coronal restorations include the following five types of material

Answer 8

• Glass ionomer
• Composite resin
• Amalgam
• Gold inlays
• Porcelain inlays

Question 9

Extra-coronal restoration include the following two catagories:

Answer 9

• Crowns: complete gold crown, porcelain crown and PFM crown (porcelain fused to metal)
• Onlays (partial crowns): gold onlays and porcelain onlays

Question 10

Crown fabrication overview

Answer 10

Dentist: tooth prep, build-up temporization, and impression

technician: model/die fabrication and crown fabrication
dentist: crown adjustment/polishing, and clinical try-in/cementation

Question 11

three principles of tooth preparation

Answer 11

• mechnical
• biological
• esthetic

Question 12

Negative image =

Answer 12

Impression - of the surrounding teeth and soft tissue

Question 13

Postive image =

Answer 13

a Model - of the teeth and surrounding tissue which us used in the fabrication of the final restoration

Question 14

PFM crown qualities

Answer 14

Combines strength of cast metal with esthetics of ceramic (porcelain)

Question 15

Specifications of a good crown

Answer 15

• good marginal adaptation
• proper occlusion
• proper inter-proximal contacts
• esthetics
• Physiologic contours and embrasures

Question 16

what is an Abutment?

Answer 16

The portion of the tooth or implant that supports the fixed or removable prosthesis (bridge). Its basically the tooth structure

Question 17

what is a Pontic?

Answer 17

The suspended member of bridge that replaces the missing tooth (or teeth)

Question 18

What is a retainer?

Answer 18

a device used to stabilize the prosthesis (unites the fixed partial denture to the abutment).
Its basically the crown that surrounds the tooth

Question 19

What is a connector

Answer 19

The portion of the fixed prosthesis which unites the retainer to the pontic

Question 20

The four parts to a fixed partial denture are:

Answer 20

• Abutments (2x)
• Retainers (2x)
• Connectors (2x)
• Pontic

Question 21

Complete denture functions to:

Answer 21

replace all teeth of one arch.

Denture is made of acrylic resin with embedded acrylic teeth. It rests on the alveolar process and overlying soft tissue

Question 22

Removal partial denture (RPD) functions to:

Answer 22

replace multiple teeth per arch with the help of remaining teeth to retain the prosthesis.

Often made of metal framework and acrylic bases

Question 23

Fixed partial denture (bridge) functions to:

Answer 23

Replace 1-3 teeth per arch. Remaining teeth help retain the fixed prosthesis

Note: dental implants can also support prosthesis

Question 24

Modified shoulder bur shape:

Answer 24

Flat-ended and tapered

Question 25

Chamfer bur shape

Answer 25

Round ended and tapered