Open AccessPostoperative sensitivity in Class V composite restorations: Comparing soft start vs. constant curing modes of LED
Author(s) -
Fahad Umer,
Frahan Raza Khan
Publication year - 2011
Publication title -
journal of conservative dentistry/journal of conservative dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.533
H-Index - 31
eISSN - 0974-5203
pISSN - 0972-0707
DOI - 10.4103/0972-0707.80738
Subject(s) - curing (chemistry) , shrinkage , materials science , composite number , composite material , polymerization , soft tissue , dentistry , significant difference , medicine , surgery , polymer
One of the major disadvantages associated with using composites is polymerization shrinkage; stresses are generated at the margins, and if these stresses exceed the bond strength, microleakage occurs at the tooth restoration interface which causes ingress of cariogenic bacteria, post-operative sensitivity, and secondary caries. LED offers several curing modes: constant cure, ramped cure, and soft start cure. It is claimed that soft start polymerization mode produces less polymerization shrinkage and consequently less postoperative sensitivity.