Aim of the study. The aim of the study was to analyze the interdental spacing in patients with different amount of dental arch reduction in relationship with prosthetic treatment needs. Material and methods. The study group included 120 individuals of both gender, aged 41–65, selected from the patients admitted to The Department of Prosthodontics, Wrocław Medical University and Academic Dental Policlinic, Krakowska Street 26, Wrocław, in years 2007–2009. Patients were divided into two study groups depending on amount of dental arch reduction and control group including individuals with complete natural dentition. All patients underwent interview and general oral cavity examination according to the protocol worked out in The Department of Prosthodontics, Wrocław Medical University. Assessment of interdental spacing was carried out with metal gauges by Pol-Intech, 0,05 milimeters thickness. The obtained data underwent statistic analysis. Results. The results of study on interdental spacing revealed more spacing with reduction of dental arch. Conclusions. Individuals with extremely shortened dental arches revealed the largest loss of dental arch integrity, thus this group of patients has the highest treatment needs.

Key words: shortened dental arch, interdental spacing, prosthetic rehabilitation.