Figure 1.
Figure 2.
Material properties rated by participants_ The property ‘vertical drift’ refers to the ease of product handling relative to undesirable movement of the bracket along the long axis of the tooth during bracket positioning_
| Question number | Material properties assessed |
|---|---|
| 1 | Dispensing system |
| 2 | Bracket stability during placement |
| 3 | Material viscosity |
| 4 | Ease of clean up |
| 5 | Bracket stability during clean up |
| 6 | Vertical drift |
| 7 | Working time |
| 8 | Overall ease of use |
Suggested hypothetical clinical scenarios, and frequency of these scenarios being chosen, by practitioners, for the use of RMGIC bracket bonding materials_
| Participants | ||
|---|---|---|
| Hypothetical clinical scenarios | Number | Per cent (%) |
| Patients with increased caries risk | 8 | 53.3 |
| Patients with enamel defects | 7 | 46.7 |
| If RMGIC is easier to use than their current adhesive | 7 | 46.7 |
| If RMGIC costs less than their current adhesive | 3 | 20 |
| If RMGIC causes less drift than their current adhesive | 4 | 26.7 |
| On specific teeth with increased caries risk | 3 | 20 |
| On specific teeth with enamel defects | 2 | 13.3 |
All materials were rated using a 10_0 cm visual analogue scale (VAS), for each handling property assessed_ Highest median VAS scores with corresponding materials of all materials trialled, highest median VAS scores with corresponding materials of all RMGIC materials, lowest median VAS scores with corresponding materials of all materials trialled, for each handling property assessed_
| Handling property | Highest rated | Median VAS | Highest rated RMGIC | Median VAS | Lowest rated | Median VAS |
|---|---|---|---|---|---|---|
| Dispensing system | APC™ Flash-Free Adhesive Coated Appliance System | 9.9 | Ortholy Glass Bond, Fuji Ortho™ LC (paste pak) | 6.0 | Fuji II LC | 4.0 |
| Bracket stability during placement | Light Bond™ thin paste, Transbond™ XT | 7.9 | Fuji® II LC | 8.0 | F2A-10-2 | 2.0 |
| Material viscosity | Transbond™ XT | 9.0 | Fuji® II LC | 8.0 | F2A-10-2 | 4.0 |
| Ease of clean up | APC™ Flash-Free Adhesive Coated Appliance System | 10.0 | Fuji® II LC | 8.0 | F2A-10-2 | 4.7 |
| Bracket stability during clean up | APC™ Flash-Free Adhesive Coated Appliance System | 9.0 | Fuji® II LC | 7.8 | F2A-10-2 | 4.2 |
| Vertical drift | Light Bond™ thin paste, Transbond™ XT | 9.0 | Fuji® II LC | 7.9 | Fuji Ortho LC | 5.1 |
| Working time | APC™ Flash-Free Adhesive Coated Appliance System, Transbond™ XT | 9.0 | Ortholy Glass Bond | 7.9 | F2A-10-2 | 6.0 |
| Overall ease of use | APC™ Flash-Free Adhesive Coated Appliance System, Transbond™ XT | 9.0 | Fuji® II LC | 7.0 | F2A-10-2 | 4.0 |
Materials trialled in the study and corresponding labels, dispensing system of each material, material category, manufacturers’ instructions for material cure times with conventional light curing units_
| Material label | Material | Dispensing system | Material category | Required cure time (with conventional light curing unit) |
|---|---|---|---|---|
| A | Fuji® II LC | Ketac applicator | Resin-modified glass ionomer cement (RMGIC) | 10 sec each, mesial and distal surfaces |
| B | Ortholy glass bond | Hand dispenser with mixing tip | RMGIC | 20 sec each, mesial and distal surfaces |
| C | Fuji Ortho™ LC (capsule) | Ketac applicator | RMGIC | 10 sec each, mesial, distal, incisal and apical surfaces |
| D | Light Bond™ thin paste | Push syringe | Resin composite (RC) | 10 sec from incisal and 10 sec from any other surface |
| E | Fuji Ortho™ LC (paste pak) | Hand dispenser with mixing tip | RMGIC | 20 sec each, mesial and distal surfaces |
| F | Transbond™ XT | Push syringe | RC | 5 sec each, mesial and distal surfaces |
| G | F2A-10-2 (trial material) | Hand dispenser with mixing tip | RMGIC | 20 sec each, mesial and distal surfaces |
| H | APC™ Flash-Free Adhesive Coated Appliance System | Pre-coated bracket | RC | 10 sec each, mesial and distal surfaces, without cleaning excess |