Treatment Planning for Fixed Prosthodontics Flashcards
what is the definition of fixed prosthodontics?
an area of prosthodontics focused on permanently attached (fixed) dental prostheses.
Such dental restorations are also known as INDIRECT RESTORATIONS
what are types of fixed prosthodontics (indirect restorations)?
- veneers
- inlays and onlays
- crowns
- posts and cores
- bridgework
what is a facebow used for in prosthodontics?
a dental instrument used to record the spatial relationship of the maxilla to the TMJ & the skull
what are diagnostic wax-ups useful for?
- treatment planning with the patient, visualise proposed changes etc
- aesthetic evaluation
- occlusal evaluation
- provisional restoration fabrication - the pt can use it and have a feel of what the final restoration will feel like
what are veneers?
thin shells made of porcelain or composite that are placed over front surface of teeth to improve their appearance
why would you place a veneer?
- improve aesthetics
- change teeth shape and/or contour
- correct peg-shaped laterals
- reduce or close proximal spaces and diastemas
- align labial surfaces of instaning teeth
when would you NOT use veneers?
- poor OH
- high caries rate
- interproximal caries and/or unsound restorations
- gingival recession
- root exposure
- high lip lines
- extensive tooth surface loss/insufficient bonding area
- HEAVY occlusal contacts
- severe discolouration
what is an inlay and an onlay?
Inlay - type of dental filling used to repair a cavity/damage that is TOO LARGE for a regular filling but not large enough for a crown. Custom made of porcelain, gold or composite
Onlay - when damage/decay is more extensive and extends to 1+ of the cusps, an onlay is produced. Made from porcelain, gold, composite
why would you restore teeth with inlays and onlays?
- tooth wear cases
- fractured cusps
- restoration of root treated teeth
- replace failed direct restorations
why would YOU NOT use inlays/onlays on a patient?
- ACTIVE CARIES & PERIO
- TIME (time intensive, for lab and dentist)
- COSTS
what is a dental crown?
a type of restoration used to cover & protect a damaged, broken or decayed tooth. Custom made cap placed over the existing tooth which helps its strength, shape, size & appearance.
Made from: porcelain, ceramic metal alloys
why would you restore teeth with a crown?
- protect weakened structure of tooth
- improve/restore aesthetics
- use as a retained for fixed bridgework
- restore tooth function
when would you NOT restore with a crown?
- active caries or perio
- more conservative options available
- lack of tooth tissue for prep
- unable to provide a post and core
- unfavourable occlusion
what are the 6 principles of crown prep?
- preservation of tooth structure
- retention & resistance
- structural durability
- marginal integrity
- preservation of the periodontium
- aesthetic considerations
what is a dental bridge?
restoration to replace 1 or more teeth. Fixed appliance that are held in place by dental crowns (abutments) on either side of the gap of the missing teeth.
Bridge cemented onto the abutments which holds the artificial tooth in place too.
