A new method to measure the linear polymerization shrinkage of composites using a particle tracking method with computer vision

In-Bog Lee; Sun-Hong Min; Deog-Gyu Seo; Sun-Young Kim; Youngchul Kwon

doi:10.5395/JKACD.2010.35.3.180

Articles

Page Path: HOME > Restor Dent Endod > Volume 35(3); 2010 > Article

Basic Research A new method to measure the linear polymerization shrinkage of composites using a particle tracking method with computer vision: In-Bog Lee, Sun-Hong Min, Deog-Gyu Seo, Sun-Young Kim, Youngchul Kwon; 2010;35(3):-187.
DOI: https://doi.org/10.5395/JKACD.2010.35.3.180
Published online: May 31, 2010

Department of Conservative Dentistry, School of Dentistry, Seoul National University, Seoul, Korea.

Correspondence to: In-Bog Lee. Department of Conservative Dentistry & Dental Research Institute, School of Dentistry, Seoul National University 275-1 Yoengeon-Dong, Jongno-Gu, Seoul, 110-786, Korea. Tel: 82-2-2072-3953, Fax: 82-2-2072-3859, inboglee@snu.ac.kr

• Received: April 22, 2010 • Revised: April 25, 2010 • Accepted: April 26, 2010

379 Views
2 Download
1 Crossref

prev next

Full Article

Download PDF

Abstract
REFERENCES

Abstract

Since the introduction of restorative dental composites, their physical properties have been significantly improved. However, polymerization shrinkage is still a major drawback. Many efforts have been made to develop a low shrinking composite, and silorane-based composites have recently been introduced into the market. In addition, many different methods have been developed to measure the polymerization shrinkage.

In this study, we developed a new method to measure the linear polymerization shrinkage of composites without direct contact to a specimen using a particle tracking method with computer vision. The shrinkage kinetics of a commercial silorane-based composite (P90) and two conventional methacrylate-based composites (Z250 and Z350) were investigated and compared. The results were as follows:
1. The linear shrinkage of composites was 0.33-1.41%. Shrinkage was lowest for the silorane-based (P90) composite, and highest for the flowable Z350 composite.
2. The new instrument was able to measure the true linear shrinkage of composites in real time without sensitivity to the specimen preparation and geometry.
Keywords: Composites; Silorane; Linear polymerization shrinkage; Computer vision; Particle tracking

Figure 1

Schematic diagram of computer vision system.

Figure 2

Specimen preparation for linear shrinkage measurement using computer vision.

Figure 3

A captured original image (left) and a binarized image (right) after filtering. The position of an object is determined by the area center method.

Figure 4

Algorithm to get the coordinate of an interesting particle from an image.

Figure 5

Linear shrinkage curves of composites as a function of time.

Figure 6

Linear shrinkage of composites at 10 min after curing.

Table 1

Composite resins used in this study.

Table 2

Linear polymerization shrinkage measured and calculated volume shrinkage of composites at 10 min.

Number in parenthesis is standard deviation.

Calculated volume shrinkage = 3× measured linear shrinkage.

REFERENCES

1. Venhoven B.A.M., de Gee A.J., Davidson C.L. Polymerization contraction and conversion of light-curing BisGMA-based methacryate resins. Biomaterials. 1993;14: 871-875.Article PubMed
2. Ferracane JL. Developing a more complete understanding of stresses produced in dental composites during polymerization. Dent Mater. 2005;21: 36-42.Article PubMed
3. Ferracane JL. Buonocore Lecture. Placing dental composites-a stressful experience. Oper Dent. 2008;33: 247-257.PubMed
4. Lai J.H., Johnson A.E. Measuring polymerization shrinkage of photo activated restorative materials by a water filled dilatometer. Dent Mater. 1993;9: 139-143.Article PubMed
5. Penn R.W. A recording dilatometer for measuring polymerization shrinkage. Dent Mater. 1986;2: 78-79.Article PubMed
6. de Gee A.J., Feilzer A.J., Davidson C.L. True linear polymerization shrinkage of unfilled resins and composites determined with a linometer. Dent Mater. 1993;9: 11-14.Article PubMed
7. Sakaguchi R.L., Sasik C.T., Bunczak M.A., Douglas W.H. Strain gauge method for measuring polymerization contraction of composite restoratives. J Dent. 1991;19: 312-316.Article PubMed
8. Fano V., Ortalli I., Pizzi S., Bonanini M. Polymerization shrinkage of microfilled composites determined by laser beam scanning. Biomaterials. 1997;18: 467-470.Article PubMed
9. Labella R., Lambrechts P., van Meerbeek B., Vanherle G. Polymerization shrinkage and elasticity of flowable composites and filled adhesives. Dent Mater. 1999;15: 128-137.Article PubMed
10. Watts DC, Cash AJ. Determination of polymerization shrinkage kinetics in visible light-cured materials: methods development. Dent Mater. 1991;7: 281-287.Article PubMed
11. Lee MR, Cho BH, Son HH, Um CM, Lee IB. Influence of cavity dimension and restoration methods on the cusp deflection of premolars in composite restoration. Dent Mater. 2007;23: 288-295.Article PubMed
12. Park JK, Chang JH, Lee IB. How should composite be layered to reduce shrinkage stress: Incremental or bulk filling? Dent Mater. 2008;24: 1501-1505.Article PubMed
13. Feilzer AJ, de Gee AJ, Davidson CL. Setting stress in composite resin in relation to configuration of the restoration. J Dent Res. 1987;66: 1636-1639.Article PubMed PDF
14. Lee IB, Cho BH, Son HH, Um CM, Lim BS. The effect of consistency, specimen geometry and adhesion on the axial polymerization shrinkage measurement of light cured composites. Dent Mater. 2006;22: 1071-1079.Article PubMed
15. Lee SH, Chang J, Ferracane J, Lee IB. Influence of instrument compliance and specimen thickness on the polymerization shrinkage stress measurement of light-cured composites. Dent Mater. 2007;23: 1093-1100.Article PubMed
16. Lee IB, Cho BH, Son HH, Um CM. A new method to measure the polymerization shrinkage kinetics of light cured composites. J Oral Rehabil. 2005;32: 304-314.Article PubMed
17. Lee IB. A new method - real time measurement of the initial dynamic volumetric shrinkage of composite resins during polymerization. J Korean Acad Conserv Dent. 2001;26: 134-140.
18. Ellakwa A, Cho NK, Lee IB. The effect of resin matrix composition on the polymerization shrinkage and rheological properties of experimental dental composites. Dent Mater. 2007;23: 1229-1235.Article PubMed
19. Weinmann W, Thalacker C, Guggenberg R. Siloranes in dental composites. Dent Mater. 2005;21: 68-74.Article PubMed
20. Papadogiannis D, Kakaboura A, Palaghias G, Eliades G. Setting characteristics and cavity adaptation of low-shrinking resin composites. Dent Mater. 2009;25: 1509-1516.Article PubMed
21. Calheiros FC, Sadek FT, Braga RR, Cardoso PE. Polymerization contraction stress of low-shrinkage composites and its correlation with microleakage in class V restorations. J Dent. 2004;32: 407-412.Article PubMed
22. Kleverlaan CJ, Feilzer AJ. Polymerization shrinkage and contraction stress of dental resin composites. Dent Mater. 2005;21: 1150-1157.Article PubMed
23. Seo DG, Min SH, Lee IB. Effect of instrument compliance on the polymerization shrinkage stress measurements of dental resin composites. J Korean Acad Conserv Dent. 2009;34: 146-152.Article
24. Kwon Y, Lee IB. Polymerization shrink-age kinetics of silorane-based composites. J Korean Acad Conserv Dent. 2010;35: 51-58.Article

Tables & Figures

Figure 1

Schematic diagram of computer vision system.

Figure 2

Specimen preparation for linear shrinkage measurement using computer vision.

Figure 3

A captured original image (left) and a binarized image (right) after filtering. The position of an object is determined by the area center method.

Figure 4

Algorithm to get the coordinate of an interesting particle from an image.

Figure 5

Linear shrinkage curves of composites as a function of time.

Figure 6

Linear shrinkage of composites at 10 min after curing.

Table 1

Composite resins used in this study.

Table 2

Linear polymerization shrinkage measured and calculated volume shrinkage of composites at 10 min.

Number in parenthesis is standard deviation.

Calculated volume shrinkage = 3× measured linear shrinkage.

REFERENCES

1. Venhoven B.A.M., de Gee A.J., Davidson C.L. Polymerization contraction and conversion of light-curing BisGMA-based methacryate resins. Biomaterials. 1993;14: 871-875.Article PubMed
2. Ferracane JL. Developing a more complete understanding of stresses produced in dental composites during polymerization. Dent Mater. 2005;21: 36-42.Article PubMed
3. Ferracane JL. Buonocore Lecture. Placing dental composites-a stressful experience. Oper Dent. 2008;33: 247-257.PubMed
4. Lai J.H., Johnson A.E. Measuring polymerization shrinkage of photo activated restorative materials by a water filled dilatometer. Dent Mater. 1993;9: 139-143.Article PubMed
5. Penn R.W. A recording dilatometer for measuring polymerization shrinkage. Dent Mater. 1986;2: 78-79.Article PubMed
6. de Gee A.J., Feilzer A.J., Davidson C.L. True linear polymerization shrinkage of unfilled resins and composites determined with a linometer. Dent Mater. 1993;9: 11-14.Article PubMed
7. Sakaguchi R.L., Sasik C.T., Bunczak M.A., Douglas W.H. Strain gauge method for measuring polymerization contraction of composite restoratives. J Dent. 1991;19: 312-316.Article PubMed
8. Fano V., Ortalli I., Pizzi S., Bonanini M. Polymerization shrinkage of microfilled composites determined by laser beam scanning. Biomaterials. 1997;18: 467-470.Article PubMed
9. Labella R., Lambrechts P., van Meerbeek B., Vanherle G. Polymerization shrinkage and elasticity of flowable composites and filled adhesives. Dent Mater. 1999;15: 128-137.Article PubMed
10. Watts DC, Cash AJ. Determination of polymerization shrinkage kinetics in visible light-cured materials: methods development. Dent Mater. 1991;7: 281-287.Article PubMed
11. Lee MR, Cho BH, Son HH, Um CM, Lee IB. Influence of cavity dimension and restoration methods on the cusp deflection of premolars in composite restoration. Dent Mater. 2007;23: 288-295.Article PubMed
12. Park JK, Chang JH, Lee IB. How should composite be layered to reduce shrinkage stress: Incremental or bulk filling? Dent Mater. 2008;24: 1501-1505.Article PubMed
13. Feilzer AJ, de Gee AJ, Davidson CL. Setting stress in composite resin in relation to configuration of the restoration. J Dent Res. 1987;66: 1636-1639.Article PubMed PDF
14. Lee IB, Cho BH, Son HH, Um CM, Lim BS. The effect of consistency, specimen geometry and adhesion on the axial polymerization shrinkage measurement of light cured composites. Dent Mater. 2006;22: 1071-1079.Article PubMed
15. Lee SH, Chang J, Ferracane J, Lee IB. Influence of instrument compliance and specimen thickness on the polymerization shrinkage stress measurement of light-cured composites. Dent Mater. 2007;23: 1093-1100.Article PubMed
16. Lee IB, Cho BH, Son HH, Um CM. A new method to measure the polymerization shrinkage kinetics of light cured composites. J Oral Rehabil. 2005;32: 304-314.Article PubMed
17. Lee IB. A new method - real time measurement of the initial dynamic volumetric shrinkage of composite resins during polymerization. J Korean Acad Conserv Dent. 2001;26: 134-140.
18. Ellakwa A, Cho NK, Lee IB. The effect of resin matrix composition on the polymerization shrinkage and rheological properties of experimental dental composites. Dent Mater. 2007;23: 1229-1235.Article PubMed
19. Weinmann W, Thalacker C, Guggenberg R. Siloranes in dental composites. Dent Mater. 2005;21: 68-74.Article PubMed
20. Papadogiannis D, Kakaboura A, Palaghias G, Eliades G. Setting characteristics and cavity adaptation of low-shrinking resin composites. Dent Mater. 2009;25: 1509-1516.Article PubMed
21. Calheiros FC, Sadek FT, Braga RR, Cardoso PE. Polymerization contraction stress of low-shrinkage composites and its correlation with microleakage in class V restorations. J Dent. 2004;32: 407-412.Article PubMed
22. Kleverlaan CJ, Feilzer AJ. Polymerization shrinkage and contraction stress of dental resin composites. Dent Mater. 2005;21: 1150-1157.Article PubMed
23. Seo DG, Min SH, Lee IB. Effect of instrument compliance on the polymerization shrinkage stress measurements of dental resin composites. J Korean Acad Conserv Dent. 2009;34: 146-152.Article
24. Kwon Y, Lee IB. Polymerization shrink-age kinetics of silorane-based composites. J Korean Acad Conserv Dent. 2010;35: 51-58.Article

Citations

Citations to this article as recorded by

Effect of layering methods, composite type, and flowable liner on the polymerization shrinkage stress of light cured composites
Youngchul Kwon, Jack Ferracane, In-Bog Lee
Dental Materials.2012; 28(7): 801. CrossRef

CanvasJS.com

ePub Link

Cite

CITE: export Copy Download Format; Close

Download Citation

Download a citation file in RIS format that can be imported by all major citation management software, including EndNote, ProCite, RefWorks, and Reference Manager.

Format:

RIS — For EndNote, ProCite, RefWorks, and most other reference management software
BibTeX — For JabRef, BibDesk, and other BibTeX-specific software

Include:

Citation for the content below
Citation and abstract for the content below

A new method to measure the linear polymerization shrinkage of composites using a particle tracking method with computer vision

J Korean Acad Conserv Dent. 2010;35(3):180-187. Published online May 31, 2010

DOI: https://doi.org/10.5395/JKACD.2010.35.3.180

XML Download

Figure

A new method to measure the linear polymerization shrinkage of composites using a particle tracking method with computer vision

Figure 1 Schematic diagram of computer vision system.

Figure 2 Specimen preparation for linear shrinkage measurement using computer vision.

Figure 3 A captured original image (left) and a binarized image (right) after filtering. The position of an object is determined by the area center method.

Figure 4 Algorithm to get the coordinate of an interesting particle from an image.

Figure 5 Linear shrinkage curves of composites as a function of time.

Figure 6 Linear shrinkage of composites at 10 min after curing.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

A new method to measure the linear polymerization shrinkage of composites using a particle tracking method with computer vision

Table 1

Composite resins used in this study.

Table 2

Linear polymerization shrinkage measured and calculated volume shrinkage of composites at 10 min.

Number in parenthesis is standard deviation.

Calculated volume shrinkage = 3× measured linear shrinkage.

Table 1 Composite resins used in this study.

Table 2 Linear polymerization shrinkage measured and calculated volume shrinkage of composites at 10 min.

Number in parenthesis is standard deviation.

Calculated volume shrinkage = 3× measured linear shrinkage.