The decreased vertical dimension of occlusion often disables prosthetic treatment of the patient. This is the reason why it is sometimes combined with surgical or orthodontic therapy in order to define dental restorative space. If the surgery or orthodontic treatment is not required, this therapy first includes changes in interjew relations which then affect temporomandibular joint and masticatory muscles. Restoring the patient's teeth should not be done before changing the interjaw relations because then he could feel pain because of the physiologically unacceptable position of condyle in temporomandibular joint. A successful treatment plan should be based on planning the interjaw relations and factors such as speech and masticatory function. Distribution of chewing forces also needs to be considered. Temporary teeth and dental stabilization splints are key steps during the therapy and require a long-term adjustment period for the patient. By making temporary teeth in the articulator, a new vertical dimension of occlusion will be chosen and occlusal contacts will be adjusted, in order to relieve teeth of chewing forces during their masticatory function and to establish anterior guidance while moving the lower jaw. Their appearance is transferred by using mock-up technique on the patient's teeth. By using a splint or temporary teeth, monitoring of the long-term adjustment to the previously lost occlusal relations is enabled. Both endodontic treatment of teeth, if pain symptoms appear, and changes in the look of the restorations can be done before the final teeth preparations for the dental restorations are done. Selecting the right dental material is also important because abrasiveness and durability of restoration can also be more stressed in these patients. The complexity of this therapy demands every step to be done precisely to avoid the risks of both early and late-stage complications.