Can months of use lead to material fatigue?

Question

My son has been using his FaceFormer regularly for almost 7 months now. We are satisfied with this in principle, but today I discovered while cleaning that small cracks formed in the material. Can the FaceFormer still be used, or must a new one be purchased?

Answer

The FaceFormer is subject to a high load during use. The material, however, is designed in such a way that it is relatively wear-resistant, but not indestructible. If necessary, the FaceFormer must also be replaced after a certain period of use, which is often also important for hygienic reasons. Comparable devices, such as bite splints, which are made by dentists and cost at least 800.00 €, wear out after already about 3 months. Afterwards they must be renewed.

A further and not rare problem which limits the durability of the FaceFormer arises, because children bite on the mouth shield and then pull at the device. This type of misuse can be recognized by the fact that clear bite marks can be seen on the mouth shield. Cracks can appear at the edges of the mouth shield or at the base of the lip wedge. If used correctly, no impressions are visible on the mouth shield.


Why is it recommended to replace the FaceFormer after six months?

Question

It is recommended to replace the FaceFormer after 6 months. What is the reason for this?

Answer

As with everything else, the material is subject to a certain amount of wear. Especially during the pulling exercises high forces are generated which load the material of the FaceFormer. If the forces are added together, the pulling exercises on 180 days alone have an effect of approx. 1800 kg on the FaceFormer, which can also fatigue the high-quality siloprene from which the FaceFormer is made in the long term.

The second reason is the hygiene aspect, i.e. the same reason why you regularly exchange toothbrushes. This does not have to be as frequent as with a toothbrush, 6 months of regular use, including hours of nightly use, are however an argument for renewal.