A Rare Case of Contact Allergy towards Impression Compound Material

Abstract

Impression compound has been introduced for more than 100 years. Since then, it has been widely used to obtain a preliminary impression of the edentulous arch. Although the use of impression compound has declined markedly over recent years as newer materials have become available, the cost-effectiveness and desirable physical and mechanical properties make this material indispensable in developing countries and teaching institutions. Its high viscosity characterizes impression compound as a mucocompressive impression material, which enables the full depth of the sulcus to be recorded for the retention of complete dentures. Literature reviews revealed that most contact allergies to impression materials are towards polyether, very few are towards alginate and polysulfide, and no reported cases have been found toward impression compound. This case report demonstrates a recent rare case of contact allergy towards impression compound during a routine impression taking for a fully edentulous arch in a 61-year-old woman. The patient developed symptoms of an allergic reaction, and the management of the condition was described.

Hydrogels: Properties and Applications in Biomedicine

“…They have inherent biocompatibility, bioactivity, and biodegradability, but relatively weak stability and mechanical strength. Although natural hydrogels are safe for the majority of the population, some materials of natural hydrogels are allergens in rare cases [65][66][67][68][69][70]. Thus, natural hydrogels have potential immunological risks if they are used in the treatment of sensitive individuals.…”

Extracellular Vesicles and Hydrogels: An Innovative Approach to Tissue Regeneration

“…While natural hydrogels are generally safe, certain materials can occasionally cause allergic reactions, posing immunological risks for sensitive individuals. 148,149 Synthetic hydrogels, on the other hand, are made from man-made polymers that are created by the polymerization of a monomer.…”

“…154 Homopolymer hydrogels contain polymer chains derived from a single type of monomer. 148,155 Copolymer hydrogels, in contrast, are derived from two or more distinct types of monomers. Based on the arrangement of their monomer composition, copolymers can be further categorized as block, alternate, or random copolymers.…”

“…Hydrogels derived from natural materials, such as cellulose, chitosan, collagen, alginate, agarose, hyaluronic acid (HA), gelatin, and fibrin. , Biocompatibility, bioactivity, and biodegradability are inherent properties, but stability and mechanical strength are typically absent. While natural hydrogels are generally safe, certain materials can occasionally cause allergic reactions, posing immunological risks for sensitive individuals. , Synthetic hydrogels, on the other hand, are made from man-made polymers that are created by the polymerization of a monomer. Examples include poly­(vinyl alcohol) (PVA), polyethylene glycol (PEG), poly­(ethylene oxide) (PEO), PHEMA, poly- N -isopropyl­acrylamide (PNIPAM), poly­(acrylic acid) (PAA), and polyacrylamide (PAAM). , Despite the fact that only a few of these materials are biocompatible, they provide stability and mechanical strength.…”

“…Depending on their composition, hydrogel polymers can be classified as homopolymers, copolymers, semi-interpenetrating networks (semi-IPNs), or interpenetrating networks (IPNs) . Homopolymer hydrogels contain polymer chains derived from a single type of monomer. , Copolymer hydrogels, in contrast, are derived from two or more distinct types of monomers. Based on the arrangement of their monomer composition, copolymers can be further categorized as block, alternate, or random copolymers.…”