Background and aim: Dental trauma injuries are public health concerns. Dental trauma affect daily living activities and quality of life. The purpose of this cross sectional study was to seeking effects of dental trauma injuries of eating, tooth hrushing, talking, social interaction, playing, schooling, sleep, smiling, showing the tooth, embarrassing.Materials and Methods: A total of 120 pupils were included in this investigation. This population consisted of 80 children with a history of dental trauma within the past 3 months and 40 children without such history.Children were recruited from neighboring schools in the city of Isfahan, Iran. Cases were subjected to a full oral health examination including: History of Dental Trauma, DMFT, demographic characteristics, occlusion, oral hygiene (WHO Criteria). Pupils were interviewed also through the Persian version of Child-OIDP on visual analogue scale (VAS). Collected data was then subjected to statistical analysis using SPSS 11.5 software.Analysis of the data was further checked using t-test, ANOVA, X2, post hoc Turkey’s test.Results: The mean frequency of dental trauma in this population was 1.21±0.91 for those with recent history of trauma. The severity of trauma impact was reported at 1.025 0.74 for tis group too. The mean of the frequencies and severity of impacts on those with no history of recent trauma were 0.60±0.50 and 0.59±0.47 respectively. The differences of OIDP were significant in two groups (P=0.001, 0.000). The means OIDP was bigger in avulsion, complex crown fracture, simple crown fracture, subluxation, enamel cracks respectively (p=0.02).Conclusion: The rate of damaged teeth is different in both groups with those who had a history to present a higher chance of repeated trauma. The highest frequency and severity of OIPD score was attributed to avulsion and complicated crown fractures.