Cent Eur J Public Health 2019, 27(1):73-77 | DOI: 10.21101/cejph.a4756

Contact sensitization to ingredients of dental materials and cosmetics in dental students: a pilot study

Maya Grigorievna Lyapina1, Maria Stoyanova Dencheva2
1 Medical College I. Filaretova, Medical University, Sofia, Bulgaria
2 Department of Oral and Image Diagnostic, Faculty of Dental Medicine, Medical University, Sofia, Bulgaria

Objective: The aim of this study was to evaluate the rate of contact sensitization to selected cosmetic allergens, i.e. ingredients of dental materials, in students of dental medicine and dental patients.

Methods: A total of 50 participants were included in the study: 40 students of dental medicine exposed to the studied allergens during the course of practical education; and 10 randomly selected dental patients without occupational exposure to the investigated substances served as a control group. All of them were patch-tested with colophonium, myroxylon pereirae resin, paraben mix, fragrance mix I, isopropyl myristate, triclosan, polysorbate 80, compositae mix II, and hydroperoxides of limonene.

Results: The sensitization rates for colophonium and polysorbate 80 were the highest. For the group of dental students, we established significantly higher sensitization rate for colophonium compared to the ones for myroxylon pereirae resin and hydroperoxides of limonene (χ2 = 4.93; p = 0.026), paraben mix (χ2 = 3.6; p = 0.05), isopropyl myristate (χ2 = 6.56; p = 0.01), and triclosan (χ2 = 8.5; p < 0.001); and to polysorbate 80 compared to the ones for myroxylon pereirae resin and hydroperoxides of limonene (χ2 = 3.97; p = 0.046), isopropyl myristate (χ2 = 5.47; p = 0.02) and triclosan (χ2 = 7.34; p = 0.007). Significantly increased concomitant sensitization rate to compositae mix and to hydroperoxides of limonene was established (χ2 = 12.55; p < 0.001). Generally, the incidence of concomitant sensitization to the studied allergens in the whole studied population was high.

Conclusions: Colophonium and polysorbate 80 could be outlined as sensitizers of paramount importance for both dental students and dental patients. We consider the major importance of exposure to colophonium during the course of practical education in dentistry for the onset of the sensitization. Sensitization to compositae mix was observed only among dental students. We consider the leading role of consumer exposure for the onset of the sensitization to triclosan and to hydroperoxides of limonene. Unexpected and unreported reactions of concomitant sensitization were observed.

Keywords: contact sensitization, students of dental medicine, colophonium, myroxylon pereirae resin, paraben mix, fragrance mix I, isopropyl myristate, triclosan, polysorbate 80, compositae mix II, hydroperoxides of limonene

Received: March 3, 2016; Revised: February 1, 2019; Published: March 30, 2019  Show citation

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Lyapina MG, Stoyanova Dencheva M. Contact sensitization to ingredients of dental materials and cosmetics in dental students: a pilot study. Cent Eur J Public Health. 2019;27(1):73-77. doi: 10.21101/cejph.a4756. PubMed PMID: 30927402.
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