Beyond Correct Answers: Dental Students' Knowledge, Uncertainty, Misconceptions, and Perceived Competence Regarding Environmental Toxicants and Tooth Development — A Two-Centre Cross-Sectional Study

This record contains the de-identified dataset and analysis code supporting the article "Beyond correct answers: knowledge, uncertainty, misconceptions and perceived competence regarding environmental toxicants and tooth development among dental students: a two-centre cross-sectional study" (submitted to BMC Medical Education). Data were collected through an anonymous online survey of 424 undergraduate dental students at the Faculties of Dentistry of Muğla Sıtkı Koçman University and İnönü University, Türkiye, in October 2026. The survey included a 20-item true/false/don't know knowledge test on early-life chemical exposures, dental materials and developmental enamel defects, and 10 Likert items on awareness, perceived competence and educational need. Contents: data/dataset_N424.csv and .xlsx (analysed dataset, N = 424; no names, e-mail addresses, IP addresses, timestamps or institution identifiers); data/codebook.csv (description of all variables); code/python (data cleaning, scoring, statistical analyses and figures; Python 3.13); code/R (exploratory and WLSMV confirmatory factor analysis; R 4.6.1, psych, lavaan, semTools); outputs (raw R output, exploration-half row list, parallel analysis output). Ethics approval: İnönü University Health Sciences Scientific Research Ethics Committee, decision no. 2026/11135. All participants provided electronic informed consent.