For information on taking a two-step impression, refer to the following:
A pontic is defined as an artificial tooth on a fixed dental prosthesis that replaces a missing natural tooth, restoring its function and esthetics. It usually fills the space previously occupied by the clinical crown of the missing tooth.
A virtual pontic is a tooth-shaped placeholder in an aligner created in the space left by missing teeth. Since the aligner does not cover a tooth in this location, there is a resulting void in the aligner. Fortunately, this void can be painted or filled to create the appearance of a tooth in that space.
For larger spaces in the posterior areas, a bar is often added to improve structural integrity, instead of a tooth-shaped void.
Pontics are represented on treatment setups as translucent teeth.
It is not unusual for a patient undergoing orthodontic treatment with clear aligners to have one or more missing teeth. One of the unique features of treating with aligners is the opportunity for the doctor to provide a virtual pontic to fill in the missing space.
You can request a virtual pontic at the time of case submission, in the "Additional Instructions" section. The technician will need to know whether you want the space filled by the pontic to close as the teeth move, or be maintained for future restoration.
A virtual pontic can be left as an empty void in the aligner, but if you want it to look more like a tooth, there are two main techniques to choose from:
Pontic aligner paint
The inside of the void can be coated with pontic aligner paint. This light cure paste comes in varying colors which can be mixed to approximate the shade of adjacent teeth and applied by the doctor or staff prior to delivery of the aligners. This technique is only necessary while the space resembles the shape of a tooth.
1. To ensure uniformity due to settlement of the product, mix the pontic paint with a spatula until uniform.
2. Apply 3-4 coats of the pontic paint with a bristle brush, stroking over each coat several times.
3. Light cure for 10 seconds at close range with an LED light after each coat.
NOTE Shades can be mixed on a mixing pad to achieve the color desired.
4. After the final coat is applied and light cured, perform a final light cure through the aligner for 20 seconds from the labial and lingual surfaces.
PVS adhesive material
Instead of painting the inside of the plastic aligner, the pontic void can be filled with a tooth-shaded, vinyl polysiloxane (PVS) adhesive material. While this technique can look good, the material is prone to falling out of the aligners.