Common causes include insufficient heating, delayed forming, inadequate vacuum or pressure, leaks in the forming system, blocked airflow, excessive model height or poor model positioning. Review the complete workflow before…
FAQ Category: Troubleshooting, Maintenance and Economics
Why are there folds or creases in my thermoformed appliance?
Folds generally occur when excess softened material gathers rather than stretching evenly over the model. Excessive model height, poor positioning, unusual model geometry or incorrect heating can contribute. Repositioning or…
Why is the material too thin around the incisors?
The incisors are often the highest and most prominent area of the model, so the heated sheet must stretch farther to cover them. This produces greater thinning. Reduce unnecessary model…
Why are there bubbles in my thermoformed sheet?
Overheating, absorbed moisture and contamination are common causes of bubbling. Confirm that the material has been stored correctly and that the selected heating program matches the sheet type and thickness.…
Why has the thermoformed material stuck to the model?
With printed models, incomplete washing or post-curing is an important possible cause because residual uncured resin can become tacky when heated. Overheating and material incompatibility can also contribute. Confirm that…
Why does my appliance distort after removing it from the model?
The appliance may have been removed before it cooled fully, overstressed during removal or formed from material unsuitable for the application. Allow the recommended cooling cycle to finish and rough-trim…
How do I clean and maintain a dental thermoforming machine?
Keep the forming area clean, remove stray granules and plastic debris, and inspect seals, model plates and moving components regularly. Follow the manufacturer’s instructions for cleaning the heater, sensor and…
How often should a dental thermoforming machine be serviced?
There is no universal service interval for every machine. Frequency depends on usage, age and the manufacturer’s recommendations. Regular inspection is important for heaters, seals, vacuum pumps, compressed-air components and…
Is in-house dental thermoforming cost-effective?
It can be very cost-effective where a practice or laboratory produces thermoformed appliances regularly. Costs include the thermoforming sheet, model production, staff time, finishing materials, equipment depreciation and remakes. In-house…
How much does it cost to make a thermoformed dental appliance?
The cost varies substantially by appliance. A useful calculation includes the thermoforming material, stone or printed model, staff production time, finishing consumables, equipment depreciation and the cost of failed or…