Sealent Flashcards
Two sealant materials
Reisin composite
Glass isome cement
How to do polymerisation
Use a light
Resin composites
Resin materials are filled or unfilled
Materials are delisted are set hard (cured) by light polymersiztion
Fluid resin is allowed to flow into pits and fissures (obtuse)
Flow related to degree of fill
Unfilled composite
Low viscosity/high flow
So lower compressive strength so should be placed out of occlusal forces (bite)
BUT
Neither bulk nor strength is required nor is complete THE SEAL IS THE DEAL
REISN SEALENTS
Resin composite materials are retained via micro mechanical attachetment
Creating microscopic porosities in the enamel surface
Achieved by etching surface enamel with strong acid (orthophosphoric acid)
Etching enamel surface
37-40% orthophosphoric acid
Unfilled low viscosity resin can flow into the depth of abt 50-100 um
When resin ser hard the portion in the micro pores locks or dovetails into the surface to create adhesion
Resin composites are very sensitive to moisture otherwise knows as…
Hydrophobic
What is successful resin composite
Dry tooth dry field
Resin composite procedure 2 step
Preparation: The tooth receiving the composite restoration is prepared by removing decay or damaged tooth structure. The area is cleaned and dried.
Etching: An acidic gel or liquid is applied to the prepared tooth surface to create micro-pores and increase surface area for better adhesion of the resin. Etching is usually done with phosphoric acid and is rinsed off after a short period.
Priming and Bonding: A bonding agent or primer is applied to the etched tooth surface to enhance adhesion between the tooth and the resin composite material. This step ensures a strong bond between the tooth structure and the restoration.
Resin Placement: The resin composite material, which is a mixture of a resin matrix and filler particles, is applied to the prepared tooth surface in layers. Each layer is carefully placed and shaped to achieve the desired shape and contour of the tooth.
Light Curing: After each layer of resin is placed, it is cured or hardened using a special curing light. The light activates photoinitiators in the resin, initiating a polymerization reaction that hardens the material. Curing typically takes around 20-40 seconds per layer.
Shaping and Polishing: Once all layers are cured, the composite restoration is shaped and contoured to match the natural anatomy of the tooth. It is then polished to achieve a smooth surface and natural appearance.
Final Evaluation: The final restoration is evaluated for fit, occlusion (bite), and aesthetics. Any necessary adjustments are made to ensure proper function and appearance.
Post-Operative Instructions: The patient is given instructions on caring for the newly restored tooth, including proper oral hygiene practices and any restrictions on eating or activities.
Summary of process
GIC
Relies on chemical bonding
Ion exchange be tooth surface and material
GIC difference
Slightly hydrophilic (good for not tooth isolation) if its hard
GIC chemical path
1-acid from liquid component attacks glass
2-surface of glass reacts realising cations (eg calcium and aluminium) and fluroide ions
3-cations cross link poly acid molecules giving sal matrix and unreacted glass cores
Temporary fissure protection
GIC
Partially erupted teeth
Management challenges
Glass ionomer
3M SB Product
Fuji products
Steps for gi table
the difference in how to activate the two kinds of GIC product as demonstrated in the video.
