Polymerisation Shrinkage
The volumetric contraction that occurs when dental resin-based materials transition from monomer to polymer during curing, which can compromise marginal integrity and contribute to secondary caries.
Full Definition
Polymerisation shrinkage refers to the reduction in volume that resin-based dental materials undergo as monomer molecules link to form polymer chains during light or chemical curing. Typical composite resins shrink by 1.5–5% volumetrically, generating internal stresses that can cause marginal gaps, cuspal deflection, and post-operative sensitivity. Editors should use the '-isation' British English spelling in journals following UK style guides, and '-ization' in American English publications, confirming the house style before standardising. The term is frequently paired with 'polymerisation stress' and 'cuspal deflection' in research literature.
Usage
Usage note: Confirm British (-isation) vs American (-ization) house style before editing. 'Polymerisation shrinkage' and 'polymerisation stress' are related but distinct concepts—do not conflate.
In Context
- "The bulk-fill composite was formulated to reduce polymerisation shrinkage stress at the cavity walls." — Product evaluation / clinical study
- "Editors should confirm whether the journal uses British or American spelling for 'polymerisation' throughout the manuscript." — Editorial style note