Bruxism is a parafunctional activity. It occurs at night in the form of cyclic lateral abrupt movements, characterized by grinding and clenching of teeth and elevated muscular tone. The forces created during these movements are much larger than the normal ones (during functional activities). The current view is that the cause of bruxism is a sleep disorder influenced by the psychological condition. There are many provocative agents, such as certain drugs, lifestyle or CNS disorders. This parafunction leaves many consequences on the masticatory system, the most noticeable of which is excessive wear of teeth. There are also headaches, hypertrophy and pain of chewing muscles, changes in the temporomandibular joint, possible enlarged tooth mobility, stagnation in salivary glands due to changes in the muscles. Patients are functionally and aesthetically damaged. Bruxism cannot be cured, but there are therapeutic possibilities for controlling this parafunction: stress control, pharmacotherapy (in severe cases), botulinum toxin, and most commonly, occlusal splint therapy. Prosthetic treatment of such patients is very demanding. It is used to treat the consequences of bruxism. Good anamnesis, clinical review and therapy plan are needed. With fixed prosthetics, we are facing the problem of small prepared teeth with poor mechanical properties, the need for lifting the bite, and also, the choice of material is crucial. In order for the therapy to be successful, it is important to evaluate what kind of prosthetic treatment would be the best in terms of restoring lost tissue, functional and aesthetic rehabilitation, while at the same time meeting patient expectations, wishes and opportunities. In addition to any prosthetic therapy, the occlusal splint should be made because the patient with this new prosthetic work continues to be a bruxist. The occlusal splint protects the prosthetic work and the remaining teeth from the new damage due to the parafunctional activity. It is important to note that maintaining a good oral hygiene is a key factor for the success of any therapy performed in the oral cavity