International Journal of Dentistry / 2012 / Article / Tab 1

Research Article

Waiting Time for Coronal Preparation and the Influence of Different Cements on Tensile Strength of Metal Posts

Table 1

Characteristics of the cements used and the manufacturers’ instructions.

Cement batch number manufacturerCompositionManufacturer’s instructions

Zinc Cement Powder-0711008
Liquid-0010308
SS WHITE Artigos Dentários Ltda-RJ
Powder-zinc oxide, magnesium oxide, coloring agents
Liquid-phosphoric acid, aluminum hydroxide, zinc oxide, distilled water
Recommended proportion: a small scoop measure of powder to 4 drops of liquid. Place powder on glass plate and divide it into multiple small parts. Shake the flask of liquid and drip liquid onto the plate. Begin mixing the powder and liquid immediately for 10 seconds per part, using a wide area of the plate.
The powder was included incrementally to avoid excess heat development. Adequate consistency for cementation will be obtained when the mixture is creamy and leaves the spatula forming a sticky drop over a period of 60 to 90 seconds.
Panavia F
51203
Kuraray Co., Osaka, Japan
Paste A—10 methacryloyloxydecyl-hydrogen phosphate, hydrophobic and hydrophilic dimethacrylate, benzoyl peroxide, camphorquinone, colloidal silica
Paste B—sodium fluoride, hydrophobic and hydrophilic dimethacrylate, diethanol-p-toluidine, Isopropyl T-sulphonate sodium benzoate, barium glass, titanium dioxide, colloidal silica
Tooth Preparation: mix 1 drop each of liquid A and B of ED Primer. Using a microbrush, apply the mixture in the root canal and wait 60 seconds. Remove excess primer with paper cone and conclude drying with light air jet.
Paste Preparation: dispense equal quantities of pastes A and B on the manipulation block. The minimum quantity of paste should correspond to a half turn of the syringe. Mix the pastes for 20 seconds. Apply the paste to the post and on the coronal remainder. Insert the post into the canal and polymerize for 20 seconds.

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