Polyether
A hydrophilic elastomeric impression material characterised by a stiff set, high detail reproduction, and good dimensional accuracy, used primarily in fixed prosthodontic impressions.
Full Definition
Polyether impression materials cure through a cationic ring-opening polymerisation of aziridine end groups, producing a crosslinked network with inherent hydrophilicity. Their stiffness on setting is notably higher than silicone-based materials, which can complicate removal from undercuts. In editorial use, 'polyether' should not be used as a generic term for impression materials; it refers specifically to this chemical class. Editors must distinguish polyether from polyvinyl siloxane (addition silicone), which is chemically distinct. Trade names such as Impregum™ are common in manuscripts and should be followed by the generic category in parentheses on first mention per most journal styles.
Usage
Usage note: Trade names (e.g., Impregum™) must be followed by the generic name in parentheses on first use. Distinguish from all silicone-based impression materials, with which polyether is frequently confused.
In Context
- "The impression was made with polyether material using a one-step putty-wash technique under rubber dam isolation." — Clinical case series
- "Authors are advised to replace 'Impregum™' with 'polyether impression material (Impregum™, 3M)' on first occurrence per the journal's materials-reporting policy." — Editorial comment