Introduction. The aim of prosthetic treatment after surgery in the region of the jaws is to obtain restoration of occlusion, restoration of the chewing function, speech improvement, better appearance of the patient, as well as sealing the operated area. Aim. The objective of the study was to analyse upper and lower jaw postoperative prosthesis in a group of patients treated in the years 2002–2015 in the Dental Prosthetics Clinic at the Medical University in Wroclaw. Material and methods. Research material consisted of 35 patients (17 women and 18 men) aged from 24 to 91 years. The patients were divided according to age, gender, reason for surgery and diagnosis, number and type of prostheses, place of residence, profession, type of soft material used for relining dentures, and treatment results. Results. 25 patients were diagnosed with cancer of the maxilla, 8 patients were diagnosed with cancer of the mandible, and 2 patients were diagnosed with maxilla cysts. There were 41 postsurgical prostheses made. In16 cases, most of which were patients from Wroclaw, squamous cell carcinoma was diagnosed. Evaluation of the results of treatment was based on the patients’ history and clinical examination. Conclusions. 1) The largest group of patients were the elderly, aged 61–70 years, with no significant difference by gender. 2) The factor causing the need for surgical treatment was more likely maxillary cancer than mandibular cancer. 3) Squamous cell carcinoma was the most frequent histopathological diagnosis, other types of cancer being less common. 4) Obdurate plates were used most often as post‑operative prostheses. 5) After analysing the data relating to the professions performed by the people operated on for cancer of the maxilla or mandible, it can be assumed that the most important etiopathogenic factor may be contact with chemicals.

Key words: obdurate plate, post-surgical prostheses, thermoplastic resin.