A transparent, tough material with good dimensional stability is normally preferred. Erkodur is widely used for conventional clear retainers because it provides a rigid, clear appliance. Erkodur-al is somewhat more…
FAQ Category: Retainers
What thickness is best for an Essix-type retainer?
Erkodur 0.6 and 0.8 mm are commonly used for Essix-style retainers, while thicker material can be selected when greater rigidity or durability is required. The finished retainer will be thinner…
How do you make a clear retainer?
Start with an accurate dental model, either stone or 3D printed. Heat the selected clear thermoforming sheet according to the material program, form it over the model using vacuum or…
Can retainers be made in the dental practice?
Yes. A dental practice can produce clear retainers in-house with an accurate model, a suitable thermoforming machine, retainer material and trimming and finishing instruments. If the practice uses intraoral scanning,…
Can I make a retainer directly from an intraoral scan?
An intraoral scan provides the digital information needed to create the model. In a conventional thermoforming workflow, the scan is converted into a printable dental model, the model is 3D…
Do I need a 3D printer to make retainers?
No. Retainers can be thermoformed over conventional stone models as well as printed models. A 3D printer becomes useful when the workflow begins with an intraoral scan or when digital…
How long should a thermoformed retainer last?
Retainer lifespan varies substantially. It depends on material thickness, grinding or clenching, cleaning habits, frequency of wear, insertion and removal technique and the patient’s occlusion. Some retainers need replacement because…
Why does a clear retainer crack?
Common causes include repeated flexing during insertion and removal, bruxism, excessive material thinning, sharp or rough trim lines, deep undercuts and normal material fatigue. Cracks often start at areas of…
Why does a clear retainer become cloudy?
Cloudiness can result from surface scratching, plaque or mineral deposits, inappropriate cleaning chemicals, hot water or normal wear. Abrasive toothpaste can also roughen the surface. Patients should clean retainers using…
How can I make a retainer more durable?
Select a suitable material and thickness, minimise unnecessary thinning by controlling model height and positioning, and finish the edges smoothly so cracks are less likely to start. Avoid over-engaging deep…