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3D full field strain analysis of polymerization shrinkage in a dental composite. Dent Mater 2013 Aug;29(8):e161-7



Pubmed ID




Scopus ID

2-s2.0-84880755034 (requires institutional sign-in at Scopus site)   11 Citations


OBJECTIVE: The objective of this research was to study the polymerization shrinkage in a dental composite using 3D digital image correlation (DIC).

METHODS: Using 2 coupled cameras, digital images were taken of bar-shaped composite (Premise Universal Composite; Kerr) specimens before light curing and after for 10 min. Three-dimensional DIC was used to assess in-plane and out-of-plane deformations associated with polymerization shrinkage.

RESULTS: The results show the polymerization shrinkage to be highly variable with the peak values occurring 0.6-0.8mm away from the surface. Volumetric shrinkage began to significantly decrease at 3.2mm from the specimen surface and reached a minimum at 4mm within the composite. Approximately 25-30% of the strain registered at 5 min occurred after light-activation. Application of 3D DIC dental applications can be performed without the need for assumptions on the deformation field.

SIGNIFICANCE: Understanding the local deformations and strain fields from the initial polymerization shrinkage can lead to a better understanding of the composite material and interaction with surrounding tooth structure, aiding in their further development and clinical prognosis.

Author List

Martinsen M, El-Hajjar RF, Berzins DW


David Berzins BS,PhD Graduate Program Director for Dental Biomaterials in the General Dental Sciences/Dental Biomaterials department at Marquette University
Rani El-Hajjar MS,PhD Assistant Professor in the Civil Engineering and Mechanics department at University of Wisconsin - Milwaukee

MESH terms used to index this publication - Major topics in bold

Composite Resins
Dental Materials
Image Processing, Computer-Assisted
Imaging, Three-Dimensional
Light-Curing of Dental Adhesives
Stress, Mechanical
Surface Properties
Time Factors