TY - JOUR
T1 - Polymerization shrinkage stress of composite resins and resin cements - What do we need to know?
AU - Soares, Carlos José
AU - Faria-E-Silva, André Luis
AU - Rodrigues, Monise de Paula
AU - Fernandes Vilela, Andomar Bruno
AU - Pfeifer, Carmem Silvia
AU - Tantbirojn, Daranee
AU - Versluis, Antheunis
N1 - Funding Information:
This study was supported FAPEMIG, CAPES and CNPq.
PY - 2017/8/1
Y1 - 2017/8/1
N2 - Polymerization shrinkage stress of resin-based materials have been related to several unwanted clinical consequences, such as enamel crack propagation, cusp deflection, marginal and internal gaps, and decreased bond strength. Despite the absence of strong evidence relating polymerization shrinkage to secondary caries or fracture of posterior teeth, shrinkage stress has been associated with postoperative sensitivity and marginal stain. The latter is often erroneously used as a criterion for replacement of composite restorations. Therefore, an indirect correlation can emerge between shrinkage stress and the longevity of composite restorations or resin-bonded ceramic restorations. The relationship between shrinkage and stress can be best studied in laboratory experiments and a combination of various methodologies. The objective of this review article is to discuss the concept and consequences of polymerization shrinkage and shrinkage stress of composite resins and resin cements. Literature relating to polymerization shrinkage and shrinkage stress generation, research methodologies, and contributing factors are selected and reviewed. Clinical techniques that could reduce shrinkage stress and new developments on low-shrink dental materials are also discussed.
AB - Polymerization shrinkage stress of resin-based materials have been related to several unwanted clinical consequences, such as enamel crack propagation, cusp deflection, marginal and internal gaps, and decreased bond strength. Despite the absence of strong evidence relating polymerization shrinkage to secondary caries or fracture of posterior teeth, shrinkage stress has been associated with postoperative sensitivity and marginal stain. The latter is often erroneously used as a criterion for replacement of composite restorations. Therefore, an indirect correlation can emerge between shrinkage stress and the longevity of composite restorations or resin-bonded ceramic restorations. The relationship between shrinkage and stress can be best studied in laboratory experiments and a combination of various methodologies. The objective of this review article is to discuss the concept and consequences of polymerization shrinkage and shrinkage stress of composite resins and resin cements. Literature relating to polymerization shrinkage and shrinkage stress generation, research methodologies, and contributing factors are selected and reviewed. Clinical techniques that could reduce shrinkage stress and new developments on low-shrink dental materials are also discussed.
KW - Composite resins
KW - Polymerization
KW - Sensitivity and specificity
KW - Tooth
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U2 - 10.1590/1807-3107BOR-2017.vol31.0062
DO - 10.1590/1807-3107BOR-2017.vol31.0062
M3 - Review article
C2 - 28902242
AN - SCOPUS:85028568779
SN - 1806-8324
VL - 31
SP - 49
EP - 63
JO - Brazilian oral research
JF - Brazilian oral research
ER -