Treatment Planning for Fixed Prosthodontics Flashcards
What are examples of fixed prosthodontics?
- veneers
- inlays & onlays
- crowns
- post & cores
- bridgework
What information can the lateral borders of a patients tongue give us?
can show any bruxism if there is scalloping of the tongue
Under what phase of treatment planning does fixed/removable prosthodontics fall?
reconstructive phase
Why are veneers placed?
- improve aesthetics
- change teeth shape or contour
- correct peg-shaped laterals
- reduce or close proximal spaces and diastema’s
- align labial surfaces of instanding teeth
What is involved in the Gurel minimal preparation technique for veneers?
- wax up
- stent
- intra-oral mock up
- preparation into mock up
What would be some contraindications for the placement of veneers?
- poor OH
- high caries rate/risk
- interproximal caries and/or unsound restorations
- gingival recession
- root exposure
- high lip lines
- if extensive prep is needed
- severely malpositioned teeth
- heavy occlusal contacts
- severe discolouration
why are inlays/onlays used in dentistry?
- tooth wear cases
- fractured cusps
- restoration of root treated teeth
- replace failed direct restorations
- minor bridge retainers
when should inlays/onlays NOT be used as a treatment option?
- active caries and periodontal diseases
- if time is an important factor (need to be made in lab)
- cost
Why are teeth restored with crowns?
- to protect weakened tooth structure
- to improve or restore aesthetics
- for use as a retainer for fixed bridgework
- when indicated for RPD design
- to restore tooth function
What would be some contraindications for restorative work involving crown placement?
- active caries & periodontal disease
- more conservation options available
- lack of tooth tissue for preparation
- unable to provide post & core
- unfavourable occlusion
What are the 6 principles of crown preparation?
- preservation of tooth structure
- retention and resistance
- structural durability
- marginal integrity
- preservation of the periodontium
- aesthetic considerations
What is meant by ‘preservation of tooth structure’ in relation to crown preparation?
Preserve sound tooth structure to avoid:
- weakening the tooth unnecessarily
- damage to pulp
What is meant by ‘retention and resistance’ in relation to crown preparation?
retention = prevents removal of the restoration along the path of insertion or the long axis of the tooth prep
resistance = prevents dislodgement of the restoration by forces directed in an apical or oblique direction and prevents any movement of restoration under occlusal forces
what does under preparation of teeth in the construction of crowns lead to?
- poor aesthetics
- over built crown with periodontal and occlusal consequences
- restorations with insufficient thickness
how can retention and resistance be applied to teeth being prepared for crowns?
- taper
- length of walls
- path of insertion
- groves/slots
