Despite the rising standard of living in Croatia, there is a high incidence of caries and periodontitis which consequently lead to tooth loss. Tooth loss leads to aesthetic and functional damage of the stomatognathic system. Integrity of the dentition is disturbed, changes occur in the periodontium, occlusion, intermaxillary relations, temporomandibular joint and muscles. Therefore, tooth replacement is necessary to preserve the health of the stomatognathic system and improve the quality of life. Possible fixed-prosthetic solutions for partial or complete edentulousness are implant placement, construction of a bridge anchored on abutment teeth (vital and avital teeth) and / or implants. Before making a fixed-prosthetic procedure, it is important to carry out the preparatory phase of therapy and make a good treatment plan. It is necessary to take a general medical and dental anamnesis, and to analyse study models and roendgenogram (RTG). Fixed-prosthetic therapy begins in the rehabilitated mouth. Regardless of the complexity of fixed-prosthetic therapy the development of a plan is an unavoidable step. A good plan avoids potential mistakes, reconciles the wishes of patients with possibilities of the profession, motivates the patient and controls the function and aesthetics of the final work. The plan of prosthetic therapy includes an analysis of abutment teeth and an arrangement of remaining teeth, determining the insertion direction of a bridgetying the bridge to the brackets/abutments, selecting the building material and the concept of occlusion. The evaluation of abutment teeth is crucial for the durability of fixed-prosthetic work which is determined by certain elements such as masticatory forces, biological factors of abutment teeth, system and method of fixation of the bridge structure, caries disposition and patient's health condition. Finally, the dentist is obliged to present a treatment plan to the patient, an approximate duration of the therapy, a price of the treatment, patient's resposibilities and the frequency of check-ups.