People nowadays are more often exposed to  psychological stress situations than in the past.
The events of the day are often worked out at night by an unconscious grinding of the teeth which exposes tooth enamel to undue friction. (occlusal chewing force is equal on an average to 100kg per  square  mm). This abrasion favours toothache and  damage to the teeth, joints  and musculature ( including the neck and back ). High quality denture such as  porcelain crowns, porcelain – faced crowns and bridges are extremely endangered.

A useful preventative in these situations is the laboratory – manufactured mouth guard. It is made of cured polymer,  is easy to clean and by separating upper and lower teeth by 1-2mm, favours the relaxation of the body  and improves the sleeping conditions of the patient.