One of the commonly practiced and useful applications of the thermoformed Zendura dental appliances is the Temporary Space Retainer used to hold the space of a missing tooth; or a Temporary Pontic Retainer that provides a durable, functional and more aesthetic provisional prosthesis to retain and replace the missing tooth for patients who will later receive tooth implant placement or final restorations.
The fabrication of a Zendura Pontic Retainer is a straightforward task that can be completed quickly and inexpensively in the office.
1. Get an accurately-made working model of the patient’s teeth. And prepare all necessary fabrication tools.
2. Fill up the space on the model where the tooth is extracted with a dental block-out material* and properly build the shape of the material until it resembles an actual tooth. Incrementally light cure the block-out material several times during the process so that the tooth shape stays firm.
3. Thermoform the Zendura plastic sheet over the model to get a regular retainer.
# (If the patient already has a retainer made before tooth extraction, skip step 2 and 3.)
4. Trim the Zendura edges to a smooth finish, as normal.
5. Create a little dimple using a dental plier on the lingual surface of the retainer where the pontic will be placed. The dimple will help secure the pontic during the next few steps.
6. Apply dental tray adhesive material to the inside of the retainer where the pontic will be placed.
7. Fill the area of the retainer where the space will be hold using a light or self-cured Crown & Bridge Provisional Material**or other similar dental composite. Match the color of the provisional material to the patient’s teeth.
8. The Zendura pontic retainer is ready to be delivered to patient within 30 minutes of curing.
1. Get an accurately-made working model of the patient’s teeth. Apply model separator to the edentulous alveolar ridge area if needed.
2. Fit a denture tooth of an appropriate size and color into the edentulous area. Cut and trim the base of the denture tooth to approximate the edentulous alveolar ridge.
3. Cut a groove about 3-4mm wide and 2-3mm deep into the lingual surface of the denture tooth, so that the plastic will fill the groove and secure the denture tooth in place during the thermoforming process.
4. Check the incisal capability of the denture tooth, then secure it in place with a quick-cure or light-cured acrylic. Wax is not suggested as it will melt during thermoforming and the denture tooth will tilt or move.
5. With the denture tooth in the right place, thermoform the Zendura plastic sheet over the teeth model.
6. Trim the appliance properly.
The most common problem with temporary pontic retainer is breakage due to localized forces and wear. It is not uncommon for a dental lab to make multiple pontic retainers at the same time to account for “expected breakage”.
Toughness, strength, rigidity and lifetime clarity make Zendura material pontic retainers a cost efficient solution for doctors to offer.Pontic retainers made of Zendura material will fit well and remain resistant to breakages during fabrication or early failure in patients’ mouths, which protects your patients' investment and improves their treatment experience and satisfaction!