Prosthodontics (Abi Nader) Flashcards
Four causes of abnormal dentition
- Caries
- Periodontal diseases
- Trauma
- Genetics (congenitally missing teeth)
Abnormal dentition leads to:
- loss of tooth substance
- loss of dentition (partial or complete)
Abnormal dentition causes two impairments:
- Function
- Esthetics
Edentulism causes:
- physical impairment
- disability
- may cause handicap
Three goals of restorative dentistry
- Eliminate infection
- Restore esthetics
- Restore function with dental prostheses (artificial substitute)
Prosthesis vs. Prosthetics
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
intra-coronal vs. extra coronal restorations
dental filling is intra coronal (deriving retetnion from external walls of remaining tooth)
crown or cap is extra-coronal
Intra-coronal restorations include the following five types of material
- Glass ionomer
- Composite resin
- Amalgam
- Gold inlays
- Porcelain inlays
Extra-coronal restoration include the following two catagories:
- Crowns: complete gold crown, porcelain crown and PFM crown (porcelain fused to metal)
- Onlays (partial crowns): gold onlays and porcelain onlays
Crown fabrication overview
Dentist: tooth prep, build-up temporization, and impression
technician: model/die fabrication and crown fabrication
dentist: crown adjustment/polishing, and clinical try-in/cementation
three principles of tooth preparation
- mechnical
- biological
- esthetic
Negative image =
Impression - of the surrounding teeth and soft tissue
Postive image =
a Model - of the teeth and surrounding tissue which us used in the fabrication of the final restoration
PFM crown qualities
Combines strength of cast metal with esthetics of ceramic (porcelain)
Specifications of a good crown
- good marginal adaptation
- proper occlusion
- proper inter-proximal contacts
- esthetics
- Physiologic contours and embrasures
what is an Abutment?
The portion of the tooth or implant that supports the fixed or removable prosthesis (bridge). Its basically the tooth structure
what is a Pontic?
The suspended member of bridge that replaces the missing tooth (or teeth)
What is a retainer?
a device used to stabilize the prosthesis (unites the fixed partial denture to the abutment).
Its basically the crown that surrounds the tooth
What is a connector
The portion of the fixed prosthesis which unites the retainer to the pontic
The four parts to a fixed partial denture are:
- Abutments (2x)
- Retainers (2x)
- Connectors (2x)
- Pontic
Complete denture functions to:
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
Removal partial denture (RPD) functions to:
replace multiple teeth per arch with the help of remaining teeth to retain the prosthesis.
Often made of metal framework and acrylic bases
Fixed partial denture (bridge) functions to:
Replace 1-3 teeth per arch. Remaining teeth help retain the fixed prosthesis
Note: dental implants can also support prosthesis
Modified shoulder bur shape:
Flat-ended and tapered
