Azrul Hafiz Abdul AzizMuhammad Hanif Mohd Rasid2024-05-282024-05-2820151875-595X904-3https://doi.org/10.1111/idj.12194https://oarep.usim.edu.my/handle/123456789/6512Volume: 65 Supplement 2Aim and purpose: White spot lesion is common phenomenon that could occur on patients with poor oral hygiene and patient with higher intake of fluoride. This condition might become worst after orthodontic fixed appliances treatment. The aim of this study was to assess the occurrence of white spot lesion on first molars prior orthodontic fixed appliances. Materials and method: Thirty patients attending Orthodontics Clinic in Faculty of Dentistry, Islamic Science University of Malaysia were screened and randomly selected for this study. Patients with medical condition and without first molars were excluded from this study. Any white spot lesion on all of the first molars were examined and charted. Results: From this study, we found that almost 56.7% patients were free from any white spot lesion on all of their first molars. Seven patients have white spot lesion on all their first molars (23% of total patients). Upper right first molar have the highest tendency of white spot lesion (40% of patients have white spot lesion on this site). Summary and conclusions: Any white spot lesion should be noted and charted prior to orthodontic treatment with fixed appliances. This study has shown that almost half of orthodontics patients have white spot lesion before treatment. This might be confused with decalcification that might occur after orthodontic treatment with fixed appliances.en-USArticle656565Suppl. 2