Mandibular anterior orthodontic metal brackets were bonded (LOT#C475 and C575, Tomy Inc., Tokyo, Japan) on 120 of the zirconia specimens after mechanical and chemical pretreatment. Orthodontic adhesive primer (Transbond™ XT primer, LOT#N731433, 3M Unitek, Monrovia, CA, USA) was applied to the specimen, the excess was removed by a dryer, and it was light-cured (Valo Cordless LED Curing Light, Ultradent Products). Afterwards, orthodontic resin paste (Transbond XT primer, LOT#N636253, 3M Unitek, Monrovia, CA, USA) was positioned using digital pressure and the excess was removed with an explorer. The bracket was light-cured from all four directions at a 45-degree angle and a 10 mm distance. Light curing was performed at 1400 mW/cm2 for 15 sec each time. The base of bracket measured 9.81 mm2 according to the manufacturer. The bracket-bonded specimens were stored at 100% relative humidity for 7 days and then were further subdivided based on whether thermocycling was to be done or not.
Transbond xt primer
Manufactured by 3M
Sourced in United States
Transbond XT primer is a light-cured dental adhesive primer designed to be used with adhesive resins. It is formulated to promote the bond between the tooth surface and the adhesive resin.
Automatically generated - may contain errors
Lab products found in correlation
Transbond xt, by 3M (4 mentions)
Transbond xt adhesive, by 3M (3 mentions)
Transbond plus, by 3M (2 mentions)
Transbond xt light cure adhesive paste, by 3M (2 mentions)
Transbond plus color change adhesive, by 3M (2 mentions)
Valo cordless led curing light, by Ultradent (1 mentions)
Valo cordless, by Ultradent (1 mentions)
Unitek gemini metal brackets, by 3M (1 mentions)
Scotchbond universal etchant, by 3M (1 mentions)
Ortholux led curing light, by 3M (1 mentions)
Trios 3, by 3Shape (1 mentions)
Transbond xt light cure adhesive, by 3M (1 mentions)
Metal brackets, by 3M (1 mentions)
Ortholux led, by 3M (1 mentions)
Victory series, by 3M (1 mentions)
Transbond mip moisture insensitive primer, by 3M (1 mentions)
Gel etch, by 3M (1 mentions)
23 protocols using transbond xt primer
1
Orthodontic Bracket Bonding on Zirconia
2
Indirect Bonding Procedure for Orthodontic Brackets
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Plaster models for every patient were cast using silicone forms of the initial patient situation.
The facial tooth surfaces of the plaster models were cleaned with isopropanol and Transbond™ XT Primer (3M Unitek Deutschland, Neuss, Germany) was applied on the expected bracket positions. The bracket bases were cleaned with a cotton pellet soaked in acetone and Transbond™ XT (3M Unitek Deutschland, Neuss, Germany) was allocated to them. Afterwards, the tray was put on the model and material excess of the composite was removed with a dental probe. Every bracket was light-cured with 3200 mW/cm2 in the extra power light polymerization mode (Valo® Cordless, Ultradent Products, Cologne, Germany) for 12 s while holding the tray in place with slight and even occlusal pressure. The tray was then removed with the help of a scaler (Figure 4 D).
The facial tooth surfaces of the plaster models were cleaned with isopropanol and Transbond™ XT Primer (3M Unitek Deutschland, Neuss, Germany) was applied on the expected bracket positions. The bracket bases were cleaned with a cotton pellet soaked in acetone and Transbond™ XT (3M Unitek Deutschland, Neuss, Germany) was allocated to them. Afterwards, the tray was put on the model and material excess of the composite was removed with a dental probe. Every bracket was light-cured with 3200 mW/cm2 in the extra power light polymerization mode (Valo® Cordless, Ultradent Products, Cologne, Germany) for 12 s while holding the tray in place with slight and even occlusal pressure. The tray was then removed with the help of a scaler (
3
Orthodontic Bracket Bonding Protocol
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All specimens were covered with a nail varnish except the buccal surface which was left uncovered. Etching of enamel bonding sites with 37% phosphoric acid was performed for 15 seconds for all teeth, and then rinsed with air-water stream, followed by thorough drying. Transbond™ XT Primer (3M Unitek, USA) was applied to etched surfaces then gently dried for 5 seconds. A small amount of Transbond PLUS color change adhesive (3M Unitek, USA) was dispensed onto the base of orthodontic brackets (Unitek™ Gemini Metal Brackets, 3M Unitek, USA) which were placed on tooth surfaces and adjusted to final position. Brackets were then bonded to the designated area, and excess adhesive was removed carefully using scalpel under microscopic observation, and then, light was cured for 10 seconds mesially and 10 seconds distally.
4
Conventional Stainless-Steel Bracket Bonding
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Once the baseline data was recorded the maxillary arch was bonded with conventional stainless-steel brackets (Stainless steel Bracket-Mini, Ormco, California, USA). The bonding procedure was done as follows; all buccal/labial surface of the teeth to be bonded was polished with a rubber cup using pumice with a slow speed hand piece (Contra angle FX22, NSK Confident Sales India Pvt. Ltd). Then the teeth were rinsed with water, air dried and etched with 37% orthophosphoric acid (d-tech, D Tech Dental Technology, Pune, India) for 30 s. The acid was rinsed off and the teeth dried until the enamel exhibited a frosted appearance. Transbond XT primer (3 M Unitek, Monrovia, CA, USA) was applied on the etched enamel surface and air thinned. Finally, “0.022” edgewise brackets was placed on the teeth with an appropriate amount of Transbond XT applied on the bracket base. Excessive adhesive around the bracket was removed and light cured for 15 s. After bracket bonding, comprehensive oral hygiene instructions were given to the patients.
5
Bracket Placement Accuracy in Orthodontics
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A thin coat of adhesive primer (Transbond XT primer, 3M Unitek, Monrovia, CA, USA) was applied to etched and dried tooth surface. Transbond XT adhesive paste (3M Unitek, Monrovia, CA, USA) [Figure 2 ] was applied to the bracket base, and in Group 1, the bracket was positioned on the center of the tooth with bracket slot oriented perpendicular to long axis of tooth with standard pressure used in clinical practice. While in Group 2, bracket was intentionally placed in an inaccurate position 2 mm gingival from the center of the tooth. The bracket was then displaced 2 mm occlusally to the center of the tooth and positioned with standard pressure used in the clinical practice [Figure 3 ]. Flash was carefully removed and then light cured for 20 s (Koden reliable dental products) each on mesial and distal sides of the bracket using a light-emitting diode curing unit.
6
Shear Bond Strength of Orthodontic Brackets
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Ten bovine teeth per group were fixed in self-curing acrylic resin blocks. The tooth surface was polished in the order of 300, 600, 1000, and 1200 grit silicon carbide (SiC) paper, treated with 37% phosphoric acid (Scotchbond™ Universal Etchant, 3M ESPE, Seefeld, Germany) for 60 s, washed with water for 30 s, and dried with air flow for 30 s [1 (link),19 (link)]. Primer (Transbond™ XT primer, 3M Unitek, Monrovia, CA, USA) was applied to the tooth surface by lightly blowing air, and then the bracket (Micro-arch Appliances Formula-R; Roth Type, Tomy Intl Inc., Tokyo, Japan) was attached to the tooth with a load of 450.14 g using adhesive (Transbond™ XT Adhesive, 3M Unitek, Monrovia, CA, USA) in the center of the tooth. Excessive adhesive around the bracket was removed, and light was irradiated for 20 s each in the distal and mesial directions. Teeth were stored in distilled water at 37 °C for one day. The shear bond strength was measured using a universal testing machine (Instron 5942, Instron, Norwood, MA, USA). The edge of the blade rod and the tooth-to-bracket adhesive were positioned parallel to each other. A load was applied using a 1 kN load cell at a crosshead speed of 1.0 mm/min, and the result was recorded as N (newton) and converted to MPa (megapascal) as the surface area of the bracket (9.1 mm2). The following formula was applied: MPa = N/(9.1 mm2)
7
Bracket Bonding Using Different Adhesives
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Each tooth was cleaned with pumice and water for 5 s, rinsed for 10 s and air dried to avoid desiccation. Teeth were then etched with 37% of phosphoric acid gel for 20 s and rinsed for 10 s. The bonding material was mixed using one scoop of powder with one drop of liquid for the control group. For mixtures containing zinc oxide, two drops of liquid had to be used in order to prepare a material with the appropriate viscosity. The RMGIC material was incorporated into the base of the premolar bracket using a cement spatula and the bracket was placed on the enamel surface. Excess material was removed from around the bracket and the remaining adhesive was light cured for 40 s (10 from each side) using the 3 M Unitek Ortholux LED curing light.
For bonding with light cure composite the teeth were etched with 37% of phosphoric acid for 30 s, rinsed and air dried using moisture free air. A thin layer of Transbond XT primer (3 M Unitek) was applied on the enamel surface and light cured for 10 s. Brackets were bonded onto the centre of the buccal surface of the teeth with Transbond XT (3 M Unitek), a light cured composite adhesive. Before curing, the excess resin was removed with a sharp scaler without disturbing the bracket position; the adhesive was light cured for a total of 40 s.
Bonded teeth were stored in water at room temperature for 24 h before testing bond strength.
For bonding with light cure composite the teeth were etched with 37% of phosphoric acid for 30 s, rinsed and air dried using moisture free air. A thin layer of Transbond XT primer (3 M Unitek) was applied on the enamel surface and light cured for 10 s. Brackets were bonded onto the centre of the buccal surface of the teeth with Transbond XT (3 M Unitek), a light cured composite adhesive. Before curing, the excess resin was removed with a sharp scaler without disturbing the bracket position; the adhesive was light cured for a total of 40 s.
Bonded teeth were stored in water at room temperature for 24 h before testing bond strength.
8
Comparative Enamel Etching Techniques
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Group I – Control Group: 60 teeth were etched with 37% phosphoric acid. Teeth were etched for 40 seconds, rinsed and air-dried. A thin layer of Transbond XT primer (3M Unitek) was applied to the enamel surface and light-cured for 10 s. Brackets were bonded onto the center of the buccal surface of teeth with Transbond XT (3M Unitek), a light-cured composite adhesive. Before curing, the excess resin material is removed with a sharp probe without disturbing the bracket position; the adhesive was light-cured for a total of 40 seconds, following the manufacturer's instruction.
Group – II – Experimental Group: 60 teeth were etched and primed by using self-etching primer that is Transbond Plus (3M Unitek), which contains both the acid and the primer and it is applied on the enamel surface of 60 teeth for 3 s and gently evaporated with air, according to the manufacturer's instructions. For activation, the two components are squeezed together, and the resulting mix is applied directly on the tooth surface. It contains a black (largest) reservoir were squeezed into white (middle) reservoir and then into purple (smallest) reservoir of the blister package using control pressure. The brackets were bonded using Transbond XT adhesive (3M Unitek) and light-cured for 40 s, in the same manner as in Group I.
Group – II – Experimental Group: 60 teeth were etched and primed by using self-etching primer that is Transbond Plus (3M Unitek), which contains both the acid and the primer and it is applied on the enamel surface of 60 teeth for 3 s and gently evaporated with air, according to the manufacturer's instructions. For activation, the two components are squeezed together, and the resulting mix is applied directly on the tooth surface. It contains a black (largest) reservoir were squeezed into white (middle) reservoir and then into purple (smallest) reservoir of the blister package using control pressure. The brackets were bonded using Transbond XT adhesive (3M Unitek) and light-cured for 40 s, in the same manner as in Group I.
9
Orthodontic Bracket Bonding Techniques
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Metal brackets (10.30.201; Morelli, Sorocaba, Brazil) were used in all groups.
Control group: No bonding was performed.
DTBX group: After prophylaxis, 37% phosphoric acid was applied on the teeth for 30 seconds, and washed and dried with the triple syringe. Transbond XT Primer (3M Unitek, Monrovia, CA, USA) was applied, followed by air jet and curing for 20 seconds. The brackets were positioned 5 mm from the incisal edge with Transbond XT Adhesive (3M Unitek). The excess adhesive was removed and curing was performed for 40 seconds per tooth, 20 seconds on each proximal face, with a curing light (Optilight Max LED; Gnatus, Ribeirão Preto, Brazil).
Control group: No bonding was performed.
DTBX group: After prophylaxis, 37% phosphoric acid was applied on the teeth for 30 seconds, and washed and dried with the triple syringe. Transbond XT Primer (3M Unitek, Monrovia, CA, USA) was applied, followed by air jet and curing for 20 seconds. The brackets were positioned 5 mm from the incisal edge with Transbond XT Adhesive (3M Unitek). The excess adhesive was removed and curing was performed for 40 seconds per tooth, 20 seconds on each proximal face, with a curing light (Optilight Max LED; Gnatus, Ribeirão Preto, Brazil).
10
Bonding Orthodontic Brackets on RP Models
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One orthodontist (J.H.P.) bonded orthodontic brackets to the teeth of the RP model using transfer jigs. The surface of the RP model was treated with the bonding agent (Transbond™ XT Primer, 3M Unitek, Monrovia, CA, USA), and the brackets were bonded with the resin adhesive (Transbond™ XT Light Cure Adhesive, 3M Unitek, Monrovia, CA, USA). Although bonding agents and resin adhesive are bonding materials used for natural teeth, not for RP models, they were used to bond the brackets on the RP model in this study to reflect the clinical situation. The resin adhesive was cured with a light curing device (VALO, Ultradent, South Jordan, UT, USA). Then, the transfer jigs were separated from the orthodontic brackets bonded onto the surface of the RP model. After removing the jigs, RP models with the bonded brackets were scanned using an intraoral scanner (Trios 3, 3shape, Copenhagen, Denmark). The 3D information about each bracket position on the RP model was obtained through this process, and the images were converted to STL files to match with the scanned initial dental models, which were also converted to STL files.
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