Further studies are necessary to suggest that Dycal can be used without any inhibitions under composite resin restorations, may be in vivo studies with long-term follow-up of the outcome are required.
What material Cannot be used under a composite filling?
Traditional base materials, such as zinc oxide-eugenol cements, have been contraindicated for composite restorations due to inhibition of resin polymerization by the phenolic hydrogen of eugenol.
Can we use calcium hydroxide under composite?
Studies have shown that calcium hydroxide “softens” under amalgam and resin-based composite restorations. When calcium hydroxide is used, a less soluble high-strength base material such as glass ionomer may be placed to overlie the calcium hydroxide.
Can Dycal be used as a cement?
Calcium hydroxide (Dycal by Dentsply Caulk and Nu-cap by GC America) is a material that generally is not thought of as a temporary cement. Instead of the ZOE-based cements, one can use the non-eugenol zinc oxide temporary cements.
Which cement can interfere with polymerization and should never be used underneath composite restorations?
Zinc oxide–eugenol cements should be used with caution under resin-based composite restorations because the eugenol can inhibit the polymerization of the resin. A glass ionomer cement base may be placed over zinc oxide–eugenol before the placement of resin-based composite in order to avoid polymerization.
What lining can be used under a composite filling?
In our practice, we have traditionally used resin modified glass ionomer (RMGI) liner/bases for deep cavities and composite procedures. By their nature, RMGI liners are typically fluid materials that can adapt more readily to the internal aspects of a cavity preparation.
Is Dycal a base or liner?
Dycal is a calcium hydroxide rigid-setting material for direct and indirect pulp capping, and a protective liner under dental filling materials, cements and other base materials.
What is the common name for calcium hydroxide dissolved in water?
calcium compounds Calcium hydroxide, also called slaked lime, Ca(OH)2, is obtained by the action of water on calcium oxide. When mixed with water, a small proportion of it dissolves, forming a solution known as limewater, the rest remaining as a suspension called milk of lime.
Why is Dycal used?
Dycal® Calcium Hydroxide Liner is a two-component, rigid-setting, self-curing material designed for use in direct and indirect pulp capping and as a protective liner under dental adhesives, varnishes, filling materials, cements, and other base materials.
How long can you leave calcium hydroxide in a tooth?
Therefore, while calcium hydroxide is a very effective intra-canal medicament, it should be used with caution for periods longer than 1 month, especially in traumatized immature teeth with thin root walls, which are more prone to root fracture.
How does Dycal work?
Our results evidence that pulp capping with Dycal, as well as with Hydrogel, stimulates the formation of reactionary dentin at the periphery of the pulp chamber. Dycal contributes to the partial closure of the pulp exposure, producing a defective reparative dentinal bridge.
What is Metapex?
A temporary root canal filling material with excellent radiopacity, Metapex is an antibacterial, premixed paste composed of calcium hydroxide with iodoform. Priced at less than half the cost of leading brands, Metapex is ideal for many applications: Exposed pulp in capping and pulpotomy.
How do you use Dycal?
Using the ball-pointed Dycal® Liner applicator or similar instrument, place the mix directly on the exposed pulp and cavity dentin judged to be less than 1.0mm remaining thickness in a thin layer. Avoid placing Dycal® Liner on enamel or the margins of the cavity. Avoid placing a large bulk of material.
What is the main disadvantage of using polycarboxylate cement?
It has excellent compressive strength and a good film thickness. Disadvantages are its low hardness and high solubility in oral fluids, low tensile strength when it is stressed, and lack of chemical bonding to either the tooth or the overlying restoration.
What is the best dental cement for crowns?
While glass ionomer cement can also be used with porcelain restorations, it’s most preferred among the majority of dentists for crowns, bridges, posts, and inlays. It provides tensile strength and compressive strength that’s comparable to zinc phosphate.
Which dental cement has maximum strength?
Zinc Phosphate Cements Zinc phosphate exhibits a very high compressive strength, average tensile strength and appropriate film thickness when applies according to manufacture guidelines.
Why is lining used under a filling?
Since the 19th century liners have often been placed in cavities in the teeth under the filling material. The liners are thought to protect the living pulp of the tooth from filling materials themselves and also from their potential to allow more heat or cold through than the natural tooth would.
Can glass ionomer be used as a liner?
Varnish, calcium hydroxide, zinc phosphate, glass ionomer, and resin can be used as a liner. Bases are applied in thick layers to provide the pulp with thermal protection. These materials must be strong enough to support a restorative material during placement and function.
What is the difference between a liner and a base?
A dental liner is a material that is usually placed in a thin layer over exposed dentine within a cavity preparation. A dental base is a material that is placed on the floor of the cavity preparation in a relatively thick layer.
Is Dycal a base?
Prisma VLC Dycal calcium hydroxide base/liner is a one-component, rigid-setting, visible light cured material designed for use in direct and indirect pulp capping and as a protective base/liner under dental adhesives, varnishes, filling materials, cements, and other base materials.
What is the difference between direct and indirect pulp capping?
Two different types of pulp cap are distinguished. In direct pulp capping, the protective dressing is placed directly over an exposed pulp; and in indirect pulp capping, a thin layer of softened dentin, that if removed would expose the pulp, is left in place and the protective dressing is placed on top.
Is Dycal calcium hydroxide?
Description: Dycal is a self-set rigid dental cement based on calcium hydroxide. It is indicated for both direct and indirect pulp coating. Dycal from denstply forms a protective base under cements, restorative materials and other base materials, stimulating the formation of secondary dentin.
Is Ca OH 2 strong or weak?
Calcium hydroxide, Ca(OH)2, is a strong base. It dissociates completely into Ca2+ and OH- ions in aqueous solution.
Why does Limewater turn milky?
Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white.
Why is calcium hydroxide a weak base?
Some strong bases like calcium hydroxide aren’t very soluble in water. That doesn’t matter – what does dissolve is still 100% ionised into calcium ions and hydroxide ions. Calcium hydroxide still counts as a strong base because of that 100% ionisation.