Restoration of Primary Teeth Flashcards
Name 5 reasons for restoring primary teeth
- Prevent pain
- Protect and preserve pulp and remaining tooth
- Ensure adequate function
- Restore aesthetics
- Maintain space
Name 3 dental factors to consider when choosing a restorative material
- Extent of lesion
- Tooth affected
- Oral hygeine
Name 5 general factors to consider when choosing a restorative material
- Age of patient (how long restoration must last)
- Cooperation
- Medical history
- Caries risk
- Parental preference
Name a specific reason a medical history is important when choosing a restorative material
Nickel allergy may occur
Describe the morphology of primary teeth compared to permanent teeth
- Smaller, more bulbous crown
- Marked cervical constriction
- Finer roots with increased divergence
- Larger pulp follows exterior contours of tooth with thin floor
- Large mesiobuccal pulp horn
Name 7 important properties to consider of a restorative material
- Mechanical
- Chemical
- Physical
- Biological
- Adhesive
- Aesthetics
- Rheolgoy
Describe 3 mechanical properties to consider when choosing a restorative material
- Compressive strength
- Hardness
- Wear resistance
Describe 3 chemical properties to consider when choosing a restorative material
- Erosion
- Corrosion
- Dissolution in the mouth
Describe a physical property to consider when choosing a restorative material
Dimensional stability
Describe a biological property to consider when choosing a restorative material
Does not harm the patient or the dentist
Describe an adhesive property to consider when choosing a restorative material
No loss of sound tooth structure
Describe 4 aesthetic properties to consider when choosing a restorative material
- Good appearance
- Opacity
- Translucency
- Colour stability
Describe 3 rheological properties to consider when choosing a restorative material
- Viscosity
- Tackiness
- Handling characteristics
Name 4 restorative materials used in children
- Composite
- Compomer
- Glass Ionomer
- Stainless Steel Crowns
Name 3 types of GIC which may be used in children for restorations
- Conventional
- Resin modified
- High viscosity
Name 4 advantages of composite as a paediatric restoration
- Adhesive
- Aesthetic
- Reasonable wear properties
- Command set
Name 4 disadvantages of composite as a paediatric restoration
- Technique sensitive
- Hard to get rubber dam on
- Expensive
- Shrinkage
Name 3 times when composite is the restorative paediatric material of choice
- Occlusal restorations
- Small interproximal restorations
- Anterior restorations (including strip crowns)
Describe the use of compomers
- Poly-acid modified composite resins
- Contain either or both GIC essential components
- Acid base reaction occurs in mouth allowing fluoride release
- Requires use of dentine bonding agent
Describe 2 comparisons of compomer and composite
- Compomer is less moisture sensitive than composite
- Compomer is less wear resistant than composite
Describe conventional glass ionomer as a paediatric restorative material
- Base glass and acidic water-soluble powder
- Setting reaction completes in minutes but matures over months
- Protect from salivary contamination during initial setting reaction
- Adhesion enhanced by enamel and dentine conditioning agents
Name 4 advantages of conventional GIC as a paediatric restoration
- Adhesive
- Tooth colours
- Fluoride leaching
- Good for stabilisation of multiple carious teeth
Name 2 disadvantages of conventional GIC as a paediatric restoration
- Brittle
2. Susceptible to erosion and wear
Describe the development of resin modified GIC
Developed to overcome problems of moisture sensitivity and low mechanical strength
Name 5 advantages of resin modified GIC as a paediatric restoration
- Adhesive
- Aesthetic
- Command set
- Easy to handle
- Fluoride releasing
Name 2 disadvantages of resin modified GIC as a paediatric restoration
- Water absorption
2. Wear
Describe high viscosity glass ionomer
- Developed for atraumatic restorative technique
- Chemically-cured
- Better mechanical properties
Describe the indications for conventional GI
Rarely indicated as better options available
Describe the indications for resin modified GI
- Temporary restorations
- Stabilisation in small or large lesions
- Patients who have a high caries rate
Describe the indications for high viscosity GI
Atraumatic Restorative Technique (ART)
What are preformed metal crowns?
Nickel-chromium
Name 3 advantages of preformed metal crowns
- Durable
- Protect and support remaining tooth structures
- Hall technique options
Name 3 disadvantages of preformed metal crowns
- Conventional preparation requires extensive tooth preparation
- Patient cooperation required
- Unaesthetic
Name 4 reasons preformed metal crowns are the restoration of choice
- More than surfaces affected
- Extensive 1 or 2 surface lesions
- Following pulpotomy or pulpectomy
- A little cooperation - Hall Technique
Describe the survival time of restorations in primary teeth
- Metal crowns and amalgam > 60 months
- Composite > 32 months
- Metal crowns have 68% 5 year survival rate
- Amalgam have 60% 5 year survival rate
- Composite have 40% 4 year survival rate
- GIC have 5% 4 year survival rate
