ABSTRACT
Introduction and Aims: tooth extraction done for any reasons has negative effect on humans psychological aspect .more ever extraction cause disorder in mastication, atheistic and speaking. The aim of this research is to study the relation frequency of extracting permanent with the reasons of it in dental clinics and Shiraz dental school in 1392 in Shiraz
Methods: this cross-sectional study has targeted 800 patients whose 2110 teeth were removed using simple sampling method among those referred to dental clinics in Shiraz. Information such as gender, age, educational level, the main cause of the tooth removal [Tooth decay, periodontal disease, prostheses, orthodontics, and also patient's desire to do so] and type of tooth were collected. Data analysis was performed using SPSS18 software and used chi-square test and logistic regression
Results: caries [25%], a combination of decay and periodontal problems [19.8 %], Patient's request [11.2%] were the most common causes of tooth removal. Chi-square test showed no significant correlation between the tooth and Gender [p=0.358?2=11.72 ]. Chi-square test showed a statically significant correlation between patients' level of education and the tooth extraction
Conclusion: based on the results, most of the teeth were extracted due to decay and a combination of decay and periodontal problems or patients' request considering the fact that they could be preserved which shows the need for increasing preventive programs and further periodic examination