Warranty & Disclaimer

True Function Laboratory, Inc. guarantees that devices are constructed to your prescription and specifications, will fit the working model provided or the working model created from the impression provided (including digital), and be free of defects in materials and craftsmanship. If any of our products fail to conform to our warranty, True Function will repair or replace the product, at the lab’s discretion. Repaired and replacement products will be covered for the remainder of the original warranty period.
Due to factors out of our control, such as distorted models or impressions, we can only guarantee our fabrication technique and the materials used. Warranty coverage is only in effect with the receipt of the original appliance, original models and/or impressions, and bite registration (if used in original manufacture of the device). All returns will be reviewed for warranty coverage upon receipt of the appliance along with the original models and/or impressions.
Patient should not wear an appliance if it is ill-fitting, broken or has a suspected defect.
Our goal is to repair or remake the device to the original prescription and design. If an office returns a case the following items are required:
  1. Original device
  2. Original models or impressions
  3. Original bite registration
  4. New model or impression of arch device was made to and new opposing model if possible, distortion contributed to the device not fitting properly
  5. New bite registration (if the bite is an issue)
In order to determine warranty, the original appliance is required at time of the warranty request. If a new appliance is ordered during the evaluation of the defective appliance, there will be a full charge for the replacement appliance.
True Function shall not be liable for any defects that are caused by neglect, misuse, or mistreatment of its products by any third party or for any product that has been altered or modified in any way by any entity other than True Function Laboratory, Inc.

Warranty Period for Individual Appliances

ApplianceWarranty Period
(in months)
Essix Retainer6
TMJ Splints6
Passive Orthodontic Retainer (Except Essix) 12
Night Guard / True Comfort12
Night Guard / Thermoplastic12
Night Guard / Milled Acrylic24
Night Guard / Acetal24
Night Guard / Traditional Acrylic24
Oasys Hinge Appliance24
Panthera DSAD / X336
Tap 3/ DreamTAP36
*Warranty excludes the occlusal surface due to forces out of our control.
**Warranty does not include locking mechanism.