Taking the perfect Silicon impression - tools & tips
The aim is to provide an accurate representation of the malocclusion using an A-silicone-based impression and a corrective impression.
Preparation for the impression
The teeth should have no deposits such as plaque or tartar. Use prophylactic measures where necessary.
A. Knead the individual components of the putty material together in equal parts (note the handling instructions provided by the manufacturer). Do not use latex gloves during this process, as this material affects the setting properties of the silicone compound. Place slightly more putty in the distal area to create an edge like boundary. Rarely does the tray have to be customized with boxing wax.
C. The initial impression can now be taken from the patient. Forcefully press the tray filled with putty and covered by the foil onto the teeth of the patient. Keep the tray in place by equally and centrically applied constant pressure, so the foil and the putty will surround the teeth – use two fingers in the maxilla on each side and one thumb in the mandible on each side. Push back any putty that spread past the tray with the dental mirror towards the last teeth to be molded.
D. Move the tray up and down and slightly back and forth immediately after positioning. Doing so ensures that no overlapping areas/undercuts remain and that a large enough space layer is created. Moving the tray allows for the assessment of the repositioning capability of the tray for the later, second impression phase. The up and down movement is especially important in the mandible, where the teeth lean towards the tongue.
E. Take out the tray and remove the foil after the putty is set.
Due to the pronounced elasticity of Plicafol, there will be no perforations or folds. The result is a custom made tray without undercuts, showing rough tooth indentations and a defined space layer. The surface is uncontaminated by saliva or blood.
A. The following steps represent the actual impression taking. Foil impression is much more comparable with the one-step impression technique than with the two-step dental impression technique.
Fill free-flowing silicone of medium consistency into the pre-impression in a thickness of 3 mm. Put the filled tray aside briefly.
Fill out your order form and provide your treatment plan
Take Panoramic & X-rays
• A cephalogy chart to value all profile characteristics.
• Panoramic and lateral x-rays for bone, root and tissue orientation.
Wax based set-up
We create a specific set-up in accordance with the treatment plan. Documents such as treatment plans and x-ray images can significantly help the laboratory in this regard. All relevant over-corrections, such as any approximal enamel reduction (AER) and torque, are incorporated into the set-up. The position of the tooth in the set-up is crucial.
Communication and approvals with you
Active control of the set-up by you as a specialist is an essential part of our work together. For this work step, we create digital photos of the set-up and malocclusion and send them to you via email. It is also possible to perform a check of the wax set-up at your practice so that you can make your own changes. A commitment to cooperation between the practice and laboratory is essential. Final production of the “dental brace” begins only after we receive your consent.
Brackets, trays and wires are now customized
Individual caps and full silicon trays can now be fabricated.
Our lingual lab will supply you with a customized archform template. You can use this template to bend all the archwires you need for your case.
If required, we will produce the treatment arches for you.
The following wires can be customized for your case:
Heat Activated Niti - THERMADENT™ Lingual
Nickel Titanium - FLEXADENT™ Lingual
Stainless Steel - DURADENT™ Lingual
Beta III - TRIDENT™ CNA BETA II Lingual
Patient bonding appointment
The tray is designed so that the fixed plastic caps are embedded within the silicone tray and designed to easily compensate for any positional deviation of the teeth (impression appointment–bonding appointment).
Note regarding the full tray: If there is limited space for all caps to be bonded at once, then individual caps can be omitted accordingly, and can be either bonded individually or placed back in the silicon tray for 2nd bonding stage.