About 34% phosphoric acid, dentsply, detrey, 24% EDTA, indigenously prepared, NRC, dentsply, detrey, Adper Prompt, 3M, ESPE, light cured composite resin, charisma, Heraeus Kulzer, Germany, Prime & Bond NT, Dentsply, Detrey.
Prime bond nt
Manufactured by Dentsply
Sourced in Germany
Prime&Bond NT is a universal dental adhesive designed for direct and indirect bonding procedures. It is a single-component, light-cured adhesive that is compatible with both self-etch and total-etch techniques.
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4 protocols using prime bond nt
1
Dentin Bonding Agent Preparation
2
Adhesive Performance on Enamel and Dentin
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Adhesives used are shown in Table 1 . A three-step etch-and-rinse adhesive, OptiBond FL (Kerr, Orange, CA, USA), a two-step E&R adhesive, Prime&Bond NT (Dentsply Sirona, Charlotte, NC, USA), a two-step self-etch adhesive, Clearfil SE Bond 2, a two-step universal adhesive, G2-BOND Universal (GC), and a one-step universal adhesive, Scotchbond Universal Plus (3M Oral Care, St. Paul, MN, USA) were used to bond a resin composite (Filtek Supreme Ultra, 3M Oral Care) to both enamel and dentin. In addition, phosphoric acid etchant (UltraEtch, Ultradent Products, South Jordan, UT, USA) was used. Adhesives, except for the universal adhesives, were applied in either etch-and-rinse or self-etch mode and universal adhesives were used in both modes based on the manufacturers’ instructions in this laboratory study.
3
Resin-Dentin Shear Bond Strength
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Surfaces of teeth were etched and no deproteinization process was carried out. Dentin-bonding agent was applied and light-cured according to the manufacturer's instruction composite resin was filled in three increments and light-cured for 20 seconds in cylindrical-shaped Teflon mold.
Fifth-generation DBA, Prime bond NT (Dentsply), was brushed according to the manufacturer's direction. Upon completion of the adhesive procedure, standardized plastic tubes were placed on the dentin surface. The resin composite spectrum 360 (Dentsply, India) was inserted in the plastic tubes (Fig. 4 ) and light polymerized.
The plastic tubes were removed to expose the resin cylinder.
All specimens were moved to the universal testing machine separately and put through to shear bond strength analysis using a universal testing machine (Fig. 5A ) at a speed of 0.5 mm/minute.
The shear bond force was applied on the junction and composite and the force was recorded in kilogram force using the software this value was converted into Newton (Fig. 5B ).
Shear bond strength was measured by utilizing the formula force (N)/bonded surface area 1 kgf = 9.8 N.
Fifth-generation DBA, Prime bond NT (Dentsply), was brushed according to the manufacturer's direction. Upon completion of the adhesive procedure, standardized plastic tubes were placed on the dentin surface. The resin composite spectrum 360 (Dentsply, India) was inserted in the plastic tubes (
The plastic tubes were removed to expose the resin cylinder.
All specimens were moved to the universal testing machine separately and put through to shear bond strength analysis using a universal testing machine (
The shear bond force was applied on the junction and composite and the force was recorded in kilogram force using the software this value was converted into Newton (
Shear bond strength was measured by utilizing the formula force (N)/bonded surface area 1 kgf = 9.8 N.
4
Restoration Evaluation: Thermocycling Nanoleakage
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After disinfection, all samples were restored with a compomer
(Dyract eXtra, Dentsply, Germany) according to the
manufacturer’s instructions. Prime&Bond NT (Dentsply, Germany)
were used as bonding agent. Finishing was achieved
by using flexible polishing discs. The restored teeth were then
subjected to thermocycling for 500 cycles in a water bath at
5°C and 55°C with a dwell time of 30 seconds. After the thermocycling
procedures, 1-mm sticks were obtained from the
center of each cavity to prepare for the nanoleakage test.
(Dyract eXtra, Dentsply, Germany) according to the
manufacturer’s instructions. Prime&Bond NT (Dentsply, Germany)
were used as bonding agent. Finishing was achieved
by using flexible polishing discs. The restored teeth were then
subjected to thermocycling for 500 cycles in a water bath at
5°C and 55°C with a dwell time of 30 seconds. After the thermocycling
procedures, 1-mm sticks were obtained from the
center of each cavity to prepare for the nanoleakage test.
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