[Contact allergy caused by new dental impression materials]

Area of Science:

• Dentistry
• Allergology
• Polymer Science

Background:

• Polymeric materials introduced in 1965 are widely used for temporary dental restorations and impression materials.
• Commonly used materials include Scutan and Impregum, which dental professionals handle regularly.

Observation:

• Prolonged contact with impression material components can lead to allergic contact dermatitis.
• Epicutaneous tests identified catalysts as the agents responsible for contact allergies in dentists and assistants.

Findings:

• Guinea pig experiments confirmed the significant sensitization potential of these catalysts.
• Methyl-dichlorbenzolsulfonat (Impregum catalyst) demonstrated a stronger allergenic effect than methyl-p-toluolsulfonat (Scutan catalyst).
• These substances also exhibit primary irritant properties.

Implications:

• Given the widespread use of these dental materials, the risk of hand eczema among dental personnel is a significant concern.
• Increased attention is required regarding the allergenic and irritant properties of Impregum and Scutan catalysts.
• Further research into safer alternatives or protective measures for dental professionals may be warranted.