Radiographic evaluations enable clinicians to detect hidden composite defects such as voids and margin irregularities and their assessment remains vital in dental school clinics especially for restorations done by supervised student trainees. These clinical environments serve as effective testing grounds for assessing restorative quality and tracking the pattern of failed restorations. A retrospective study utilizing the patients’ data such as various types of radiographs. Patients’ files from Namuthijiya and Muneseya campuses were accessed once ethical approval was acquired. The total sample of 200 students (with their patient files) included 100 males and 100 females. 25 x-rays from each level and gender were selected. Reasons of composite restoration failure including fracture, secondary caries, irregular margins, overhangs and lack of proximal contact were assessed and documented. Moreover, the patients’ data such as gender, age, systemic disease and operator’s level were also noted. Among the 200 files we screened. 22% of the files had subpar quality, out of which 41% of the patients were treated by male students, and 59% by females. The most commonly observed reason of composite restoration failure was secondary caries (34%), and overhangs being the least observed reason (11%). It can be concluded that the overall quality of dental students’ placed restorations was satisfactory.
