Materials and Methods: This study employed a cross-sectional study design and multistage sampling was used to sample 384 students (138 males and 146 females). Prior to the collection of data, ethical approval was obtained from Delta State University, Research and Ethics Committee of Human Anatomy Department. Data were obtained via self-administered questionnaires. Chi-square test of association was used to assess categorical variable and probability was ascribed at value < 0.05.

Results: Findings observed from the study was that 56 (14.6%) of the entire sample had discolouration of the central incisors tooth. Results showed females (61.0%) having a higher distribution of discoloured central incisors compared with male (39.0%) but no significant (p>0.05) gender association was observed. Findings showed that frequency of brushing has a significant association (p<0.05) with discoloration of central incisors. The findings also revealed no significant association (p>0.05) between certain variables (occurrences of plagues, dental caries, root canal therapy, scaling and polishing, bad breath, taking of tea, coffee and iron containing solutions) and discoloration of central incisors.

Conclusion: Distribution of discoloured central incisors among the studied sample was 14.6% and there was no considerable gender association as regards discolouration of central incisors. Regularity of tooth brushing has a significant association with the occurrences of discoloured central incisors.