Simple optical method for measuring free shrinkage

Dental Materials : Official Publication of the Academy of Dental Materials
Daranee TantbirojnA Versluis

Abstract

A simple optical method for measuring polymerization shrinkage of dental composites is compared with an established dilatometer. Five restorative composites were used to test the methods: Filtek Supreme Ultra (3M ESPE), Filtek LS (3M ESPE), Premise (Kerr), Gradia Direct (GC), and GC Kalore (GC). Uncured composites were attached to sandblasted silane-treated glass slides. The slides were placed sample side inside a mercury-filled dilatometer (ADAF). The mercury levels were recorded as the materials were light-cured through the glass-slides (40s). Mercury levels, which correlated with volumetric shrinkage, were recorded for 60min (N=6). For the optical method, uncured composite was placed on a smooth silicone platform. A pre-polymerization image was captured under a stereomicroscope, and the specimen was light-cured (40s). Post-polymerization images were captured at 2, 10, 60, and 90min (N=10). Composite outlines were traced to obtain projected surface areas (ImageJ) and volumetric shrinkage was calculated. Results were analyzed using two-way ANOVA (α=0.05) and Pearson Correlation tests. Shrinkage deformation for both methods was modeled using finite element analysis. Volumetric shrinkage at 60min ranged between 1.24% and 2.24% f...Continue Reading

References

Oct 1, 1991·Dental Materials : Official Publication of the Academy of Dental Materials·D C Watts, A J Cash
Jan 1, 1989·Dental Materials : Official Publication of the Academy of Dental Materials·J S Rees, P H Jacobsen
Aug 1, 1988·Journal of Dentistry·A W WallsJ J Murray
Apr 1, 1986·Dental Materials : Official Publication of the Academy of Dental Materials·R W Penn
Jan 1, 1993·Dental Materials : Official Publication of the Academy of Dental Materials·A F de GeeC L Davidson
Mar 1, 1993·Dental Materials : Official Publication of the Academy of Dental Materials·J H Lai, A E Johnson
Jul 2, 1998·Journal of Dental Research·A VersluisW H Douglas
Jul 1, 1997·Dental Materials : Official Publication of the Academy of Dental Materials·R L SakaguchiW H Douglas
Mar 26, 2003·Journal of Dentistry·Louis J SharpByoung I Suh
May 1, 1953·The Journal of the American Dental Association·D L SMITH, I C SCHOONOVER
May 12, 2004·Dental Materials : Official Publication of the Academy of Dental Materials·Antheunis VersluisWilliam H Douglas
Aug 8, 2006·Dental Materials : Official Publication of the Academy of Dental Materials·Akira YamamotoToshiki Takamizawa
Jun 19, 2007·Dental Materials : Official Publication of the Academy of Dental Materials·Jirun Sun, Sheng Lin-Gibson
Sep 30, 2008·Dental Materials : Official Publication of the Academy of Dental Materials·Yu-Chih ChiangKarl-Heinz Kunzelmann
Feb 23, 2010·Dental Materials : Official Publication of the Academy of Dental Materials·In-Bog LeeJack Ferracane
Feb 2, 2011·Journal of Dental Research·D TantbirojnA Versluis
Sep 29, 2012·Dental Materials : Official Publication of the Academy of Dental Materials·A Alnazzawi, D C Watts
Apr 15, 2014·The Journal of Prosthetic Dentistry·Sarah B GibbsSwati Ahuja

❮ Previous
Next ❯

Citations

Oct 7, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·Wojtek LibeckiMatthias Kern
Feb 26, 2016·Journal of Dental Research·E A SuiterA Versluis
Sep 14, 2017·Brazilian Oral Research·Carlos José SoaresAntheunis Versluis
Oct 25, 2017·Dental Materials : Official Publication of the Academy of Dental Materials·Taylor EnochsAntheunis Versluis

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.