Inlays, Onlays and Veneers Flashcards
what are indirect restorations? give examples:
restorations fabricated outside the mouth by a technician in a laboratory
- crowns
- post & cores
- bridgework
- inlays & onlays
- veneers
what is an inlay?
Intra-coronal restoration made in lab (filling made outside mouth)
what are the different types of inlays?
- gold
- composite
- porcelain
what can inlays be used for?
- occlusal cavities
- occlusal/interproximal cavities
- replace failed direct restorations
in what teeth would an inlay be indicated?
- premolars or molars
what are the advantages of placing an inlay as opposed to a direct restoration?
- superior material and margins
- won’t deteriorate over time
what are the disadvantages of placing an inlay as opposed to placing a direct restoration?
- time
- cost
what tools may be used to prepare an inlay?
- No.170L burr
- No. 169L burr
- Coarse-grit flame diamond burr
- Flame burr
- Enamel hatchets
- Binangle chisel
- Gingival margin trimmers
What would the preparation margins be for a ceramic inlay prep?
- 1.5-2mm isthmus width
- 1.5mm depth
- 1mm shoulder or chamfer margin
What would the preparation margins be for a gold inlay prep?
- 1mm isthmus width
- 1.5mm depth
- 0.5mm chamfer margin
How would a temporary inlay be placed?
- take impression of teeth
- prep inlay
- place temporary material into impression & reset it back onto tooth
- trim temp restoration & cement in place
what are examples of direct temporal inlay materials?
- Kalzinol (ZOE)
- Clip (composite based material)
- GI
what cement is used for ceramic inlays?
NX3 (nexus)
what cement is used with gold inlays?
AquaCem
what is an onlay?
extra-coronal restoration made in lab, like inlay but has full cuspal coverage
when would placement of an onlay be indicated?
- sufficient occlusal tooth substance loss
- remaining tooth substance weakened
- pre-existing large restoration
what are the alternatives to placing inlays/onlays?
Large direct restorations:
- amalgam
- composite
- GI
Crowns
Extractions
what is a laminate veneer?
a thin layer of cast ceramic that is bonded to the labial or palatal surface of a tooth with resin
what are the different types of veneers?
- ceramic
- composite
- gold
when are veneers indicated?
- patient wants to improve aesthetics
- change teeth shape/contour
- correct peg-shaped laterals
- reduce or close proximal spaces & diastemas
- align labial surfaces of instanding teeth
when would veneers be contraindicated?
- poor OH
- high caries rate
- gingival recession
- root exposure
- high lip lines
- heavy occlusal contacts
- severe discolouration
what are the different types of veneer prep?
- feathered incisal edge
- incisal bevel
- intra-enamel (window)
- overlapped incisal edge
