Polymerization contraction in composites - How to reduce it?

Longurova, Natasa and Zlatanovska, Katerina and Kovacevska, Ivona and Zarkova-Atanasova, Julija (2024) Polymerization contraction in composites - How to reduce it? In: 28th BaSS Congress, 25-27 April 2024, Avala Resort and Villas, Budva, Montenegro.

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Abstract

Introduce:In modern restorative dentistry , polymer resin-based composite materials are alternative materials for traditional amalgam fillings in posterior teeth. It is a fact that currently, no composite material provides a good one adhesion to the cavity walls and inappropriate marginal the adaptation of the filling and leads to the appearance of a microcrack, marginal discoloration, post-operative sensitivity, secondary caries, and pulp diseases.
Aim: The aim of this paper is to evaluate the influence of different placing and light polymerization techniques on marginal adaptation of composite restorations.
Material and methods:The review includes relevant literature from online databases (PubMed, MedLine) , on the topic of polymerization contraction in composite materials and factors that will lead to its reduction.
Result and discussion: Modern composite materials used in restorative dentistry show a polymerization contraction of 1-6%, depending on the composition and conditions of the polymerization process. Several clinical methods are proposed in order to reduce the negative effects of polymerization contraction. One way to reduce the effect of contraction stress is to place a liner with a low modulus of elasticity between the teeth and the composite material. Another approach to solving this problem is incremental placement of composite material in the cavity. By eliminating a single point of stress, centrally placed, the marginal adaptation of the composite material is improved. One of the methods is the two phase soft-start polymerization, and the configuration factor determines the tension behavior of the adhesive materials placed in the cavities.
Key words: soft-start polymerization, polymerization shrinkage, marginal discoloration.

Item Type:	Conference or Workshop Item (Poster)
Subjects:	Medical and Health Sciences > Other medical sciences
Divisions:	Faculty of Medical Science
Depositing User:	Natasa Longurova
Date Deposited:	27 May 2024 13:41
Last Modified:	27 May 2024 13:41
URI:	https://eprints.ugd.edu.mk/id/eprint/34165

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