Analyzing the occupational exposure risks of dental healthcare workers from the perspective of repeated occupational exposure

Healthcare workers in dental hospitals frequently experience repeated occupational exposures (ROEs). In our study, we aim to analyze these repeated exposures among dental healthcare workers (DHWs), assess the risk levels of different risk factors, and explore the significance of ROE data for infection control in dental hospitals. Based on hospital statistical data, we categorized the occupational exposure incidents at West China Hospital of Stomatology over the past seven years into initial and repeated exposures. We analyzed the association of various risk factors, including personnel types, gender, treatment locations, timing of occupational exposure, and pathways of occupational exposure, with the occurrence of repeated exposures. The Statistical Package for Social Sciences (SPSS) 21 was used to conduct chi-square analysis and binary logistic regression analysis, with the significance level set at p < 0.05. Compared to students, hospital dentists with teaching qualifications exhibited a higher risk of ROEs. The risk of repeated exposure for dental students was 60% lower than that of hospital dentists (P = 0.003). However, gender, treatment locations, timing of occupational exposure, and pathways of occupational exposure did not significantly impact the repeated exposures among DHWs. Our study demonstrates that the analysis of repeated occupational exposures (ROEs) is meaningful. In our study, hospital dentists with teaching qualifications had the highest risk of ROEs, compared to dental students, hospital dental nurses, and dental nurse students. This means that among individuals who have already experienced occupational exposure, hospital dentists are more likely to experience repeated exposure. Meanwhile, gender, treatment locations, timing of occupational exposure, and pathways of occupational exposure did not have a significant impact on the occurrence of ROEs.