Acrylic allergies
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Acrylic allergies information

Allergies and denture intolerance Intolerance to dentures as a result of allergy is very rare. In such cases the allergy is triggered not by the acrylic itself but the unpolymerised precursors and lead substances. Epicutaneous test data indicate that reactions are primarily due to the benzoyl peroxide initiator and the hydrochinone inhibitor. In contrast, the monomers MMA and TEGDMA are allergens that are primarily relevant for dental technicians in their jobs. It must be noted here that latex and vinyl gloves are not adequate barriers for monomers. This is still generally unknown, because...

Residual monomer content There is no indication in the literature of an increased occurrence of allergic-toxic reactions resulting from the use of cold-curing acrylic resins. It is important in this context to note that the residual monomer content rapidly decreases on storage in water. The risk of a chemical-toxic effect from the release of residual monomer from acrylic denture materials is therefore minimized. Interesting information on residual monomer Monomer is the standard term for a molecule that can be polymerized. MMA (methyl methacrylate) is not the only monomer (other monomers...

PVC-based acrylics In this group mixed polymers consisting of vinyl chloride, vinyl acetate and methyl methacrylate acid ester are used as denture materials. This denture acrylic group includes luxene and virlene, which show good dimensional consistency, low water absorption and high breaking strength. They require a complex special apparatus for processing using the melt-press process, which means that these materials are little used. Acrylics based on polyurethane resin and Plexiglas This is also a mixed polymer of polyurethane and PMMA. It is a single-component denture material in the...

Composition of denture materials What the monomer mixture does in the denture material? The monomer allows the denture material to be processed. The monomer is the solvent for the second component, the polymer body. The monomer transports important additives that only remain stable with the polymer, such as colorants and catalysts, In the liquid mixture that is to be processed. After the curing phase the monomer itself becomes a polymer material and is primarily there to reinforce the structure of the substance. After polymerization, the denture material has the desired properties such as...

Processing tips We as dental technicians do not observe the following items, but they are very important for processing thermoplastic acrylics: Fitting accuracy Cold-curing polymers generally fit more accurately than heat-curing polymers after polymerization. However, this changes after a short time, because the high residual monomer content is decomposed and replaced by water and the curing process of the material continues. The heat-curing polymer is always subject to the problem of thermal shrinkage. Even post-injection systems like the SR-lvocap can only compensate for this m ate ri a...

Technical Data