Week 2 PP Flashcards
What are Type I Resetorative Materials?
Cements or luting agents (permanent or temporary). Used as an adhesive for indirect restorations, adhesive for indirect restorations, adhesive for provisional restorations or an adhesive for orthodontic appliances
What are Type II Restorative Materials?
Materials include amalgam, composite and glass ionomer. Maybe permanent restorations or intermediate restoration material (IRM) and dental sealant
What are Type III Restorative Materials?
Liners, bases and bonding agents that are placed into the cavity preparation
How many types of Restorative Material - categorized according to their use & properties.
3 Types - Type 1, 2, & 3
What are the advantages of Glass Ionomer?
- most verstatile dental materials available
-biocompatible within the oral environment
-can be used for many differet purposes within the mouth
-adhere to the tooth chemically
-limited tooth preparation required (less than that of composite or amalgam)
-releases fluoride after the final settings (inhibits decay)
Glass Ionomers can be used for/as:
-Permanent cementation of crowns, bridges, inlays & onlays
-cementation of orthodontic brackers and bands
-dental base
-cavity liner
-root canal sealer
-restorative material - Class V and primary decayed teeth
-core build-up material- ease of placement, adhesion, fluoride release & thermal qualities
- sealants
Why is Glass Ionomer the material of choice for primary teeth?
due to fluoride release & minimal preparation required
Why is Glass Ionomer used for Sealants?
More fluid to allow flow into the deep pits and fissures
Why is Glass Ionomer beneficial for temporary restorations?
longer term temporary restoration
What is the composition of Glass Ionomer?
Glass - a combo of glass, ceramic particles, and glassy matrix. This is how it derives its translucency and prolonged floride releasing properties
Ionomer - ion cross-linked polymers like acrylic acid. This ensures excellent adhesion and resistance to acid erosion
What type of Glass Ionomer systems are available?
- in powder/liquid, paste systems, syringes and capsule forms
They come in both self-curing and light curing systems
6 Types of Glass Ionomers
Type I - luting cement - cementing indirect restorations
Type II - restore areas of root caries, class V and primary restorations
Type III - liners and bases
Type IV - pit and fissure sealants
-Type V - cementation of orthodontic bands and brackets
Type VI - used for core build-up of a restoration
What is Resin Modified Glass Ionomer?
Resin gives the material a better strength, greater wear resistance and an improved esthetic quality. Resin component allows for the product to be light-cured or auto-cured or both
What is Metal Reinforced Glass Ionomer?
Blend of spherical silver-tin alloy with glass ionomer, which produces a strong, abrasion-resistant material. Due to its level of radiopacity it is a great choice for core-build-ups, fractured cusps and amalgam fillings (Class I, II, V), as a base and an abutment for overdentures
not to look pretty
Mixing and Application of Glass Ionomer when supplied as a powder/liquid
-Mixed on a paper pad using a spatula
-All powder is incorporated into the liquid in increments
-should be completely mixed in 20-25 seconds
-placed into an applicator
-applied to tooth
-light cured (if required)
Ideal Properties of Glass Ionomer
-strong enoough to act as a supportive base
-chemically bonds to enamel ,dentin, and material materials
-releases fluoride ions to prevent secondary decay by strengthening the adjacent tooth structure
–tooth doesn’t need to be completely dry because the cement will stikc to a slightly moist surface
-will not shrink and pull-away from tooth
-non-irritating qualities - tolerated by the pulp and are free from phosphoric acid
Cautions for Placing Glass Ionomers
-avoid water contamination/contact with the material
-be aware that when the material’s gloss appearance has disappeared, the setting stages have begun
-Protect the matrix band from the material; the material will adhere to the metal bad
What are the Advantages of Glass Ionomer?
-forms a strong bond to dentin to reduce microleakage and post-op sensitivity
-slow release of fluoride inhibits recurrent decay
-causes less trauma or shock to the pulp than is caused by other types of cements
-Low solubility in the mouth
-Aheres to a slightly moist tooth surface
-very thin film thickness - important for ease of seating a crown, bridge, onlay
-can be formulated as a dentin substitute or base material
What are some disadvantaes of Glass Ionomer?
- not ideal for placement on biting surfaces - not strong enough to last a long time
-staining or discoloration over time due to certain foods and drinks & tobacco
-limited shade matches
-tooth sensitivity - ususally temporary
-esthetically inferior to composite resin, as it does not reflect light, even with finishing gloss
What are the Post Operative Instructions for Glass Ionomer Restoration?
-post op regarding topical and local anesthetic
-let patient know the tooth could be sensitive for a few days, but the discomfort should get progressively better
- if pain gets worse call the office
-If the bite feels off once anesthetic wears off, call the office (if occlusal is involved)
-Show the patient the filling that was completed
-Filling is completely set, therefore the patient can eat and drink as normal on that tooth once the anesthetic wears off
Contraindication for Glass Ionomer Restoration?
-Pulp capping**
Glass Ionomer Fuji II LC Info
Working time - 3 min 45 seconds
Light cure time - 20 seconds
1.8mm
