The comparison of relative reliability on biaxial and three point flexural strength testing methods of light curing composite resin

Deog-Gyu Seo; Byoung-Duck Roh

doi:10.5395/JKACD.2006.31.1.058

Articles

Page Path: HOME > Restor Dent Endod > Volume 31(1); 2006 > Article

Original Article The comparison of relative reliability on biaxial and three point flexural strength testing methods of light curing composite resin: Deog-Gyu Seo, Byoung-Duck Roh; Journal of Korean Academy of Conservative Dentistry 2006;31(1):58-65.
DOI: https://doi.org/10.5395/JKACD.2006.31.1.058
Published online: January 31, 2006

Department of Conservative Dentistry, College of Dentistry, Yonsei University, Korea.

Corresponding Author: Byoung-Duck Roh. Department of Conservative Dentistry, College of Dentistry, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul, 120-752, Korea. Tel: 82-2-2228-3146, Fax: 82-2-313-7575, operatys16@yumc.yonsei.ac.kr

• Received: August 9, 2005 • Revised: October 30, 2005 • Accepted: December 28, 2005

20 Views
0 Download

prev next

Full Article

Download PDF

Abstract
REFERENCES

Abstract

The possibility of applying a bi-axial flexure strength test on composite resin was examined using three point and bi-axial flexure strength tests to measure the strength of the light-cured resin and to compare the relative reliability using the Weibull modulus.

The materials used in this study were light-curing restorative materials, MICRONEW™, RENEW® (Bisco, Schaumburg, USA). The bi-axial flexure strength measurements used the piston-on-3-ball test according to the regulations of the International Organization for Standardization (ISO) 6872 and were divided into 6 groups, where the radius of the specimens were 12 mm (radius connecting the 3-balls: 3.75 mm), 16 mm (radius connecting the 3-balls: 5 mm), and the thickness were 0.5 mm, 1 mm, 2 mm for each radius.

The bi-axial flexure strength of the MICRONEW™ and RENEW® were higher than the three point flexure strength and the Weibull modulus value were also higher in all of the bi-axial flexure strength groups, indicating that the bi-axial strength test is relatively less affected by experimental error.

In addition, the 2 mm thick specimens had the highest Weibull modulus values in the bi-axial flexure strength test, and the MICRONEW™ group showed no significant statistical difference (p > 0.05). Besides the 2 mm MICRONEW™ group, each group showed significant statistical differences (p < 0.05) according to the thickness of the specimen and the radius connecting the 3-balls.

The results indicate that for the 2 mm group, the bi-axial flexure strength test is a more reliable testing method than the three point flexure strength test.
Keywords: Biaxial flexure strength; Three point flexure strength; Weibull modulus; Composite resin

REFERENCES

1. Anusavice KJ, Hojjatie B. Stress distribution in metal ceramic crowns with a facial porcelain margin. J Dent Res. 1987;66: 1493-1498.PubMed
2. Zidan O, Asmussen E, et al. Tensile strength of restorative resins. Scand J Dent Res. 1980;88: 285-289.Article PubMed
3. Bryant RW, Mahler DB. Modulus of elasticity in bending of composites and amalgams. J Prosthet Dent. 1986;56: 243-248.Article PubMed
4. Radford KC, Lange FF. Loading factors for the biaxial flexure test. J Am Ceram Soc. 1978;61(5-6):211-213.
5. Han BS. Al2O3 selamigseu-ui yeolchunggyeog pagoe geodonggwa yeol-eunglyeog haeseog. 1997;Yeonsei Univ. Graduate School; doctorate thesis.
6. Mckinney KR, Herbert CM. Effect of surface finish on structual ceramic failure. J Am Ceram Soc. 1970;53: 513-516.
7. Kirstein AF, Woolley RM. Symmetrical bending of thin circular elastic plates of equally spaced point supports. J Res Nall Burstds. 1967;71(C):1-10.
8. Kao R, Perrone N, Capps W. Large-deflection solution of the coaxial-ring-circular-glass-plate flexure problem. J Am Ceram Soc. 1971;54: 566-571.Article
9. Shetty DK, Roesinfield AR, Duckworth WH, Held PR. A Biaxial-flexure test for evaluating ceramic strength. J Am Ceram Soc. 1983;66: 36-42.
10. Marshall DB. An improved biaxial flexure test of ceramics. Am Ceram Soc Bull. 1980;59: 551-553.
11. Lamon J. Statistical approaches to failure for ceramic reliability assessment. J Am Ceram Soc. 1988;71: 106-112.Article
12. Wilshaw TR. Measurement of tensile strength of ceramics. J Am Ceram Soc. 1968;51: 111-117.Article
13. Park SE. Biaxial fracture behavior and simulation for prediction of fatigue lifetime in alumina by ball-on-3ball test. 2000;Yeonsei Univ. Graduate School; doctorate thesis.
14. Shetty DK, Roesinfield AR, Macguire P, Bansal GK, Duckworth WH. Biaxial flexure tests for ceramics. Am Ceram Soc Bull. 1980;59(12):1193-1197.
15. Shetty DK, Roesinfield AR, Bansal GK, Duckworth WH. Biaxial fracture stuies of a glass-ceramic. J Am Ceram Soc. 1981;64(1):1-4.
16. Williams RM, Swank LR. Use of Weibull statics to correlate MOR, Ball-on-ring, and rotational fast fracture tests. J Am Ceram Soc. 1983;66(11):756-768.
17. Ham-Su R, Wilkinson DS. Strength of tape cast and laminated ceramics. J Am Ceram Soc. 1995;78(6):1580-1584.Article
18. Chiang MYM, Tesk JA. Differences: Hertz vs finite element calculation for diametral tensile strength. J Dent Res. 1989;68: 341-348.
19. Ban S, Anusavice KJ. Influence of test method on failure stress of brittle dental materials. J Dent Res. 1990;69(12):1791-1799.PubMed

Figure 1

Schematic illustration of three point flexure test.

Figure 2

Schematic illustration of piston-on-three-ball bi-axial flexure test.

Figure 3

Weibull modulus graph according to specimen thickness on 3.75 mm supporting ball radius (MICRONEW™, Bisco, Schaumburg, U.S.A.).

Figure 4

Weibull modulus graph according to specimen thickness on 5 mm supporting ball radius (MICRONEW™, Bisco, Schaumburg, U.S.A.).

Figure 5

Weibull modulus graph according to specimen thickness on 3.75 mm supporting ball radius (RENEW®, Bisco, Schaumburg, U.S.A.).

Figure 6

Weibull modulus graph according to specimen thickness on 5 mm supporting ball radius (RENEW®, Bisco, Schaumburg, U.S.A.).

Table 1

Light cured composite resin used in this study

Table 2

Mean flexure strength and Weibull modulus of three point flexure test and biaxial flexure test

If the alphabet is different, significant difference at α= 0.05 (between the thickness on the same diameter).

^*indicates significant difference at α= 0.05 (between the diameter on the same thickness).

Table 3

Mean flexure strength and Weibull modulus of three point flexure test and biaxial flexure test

If the alphabet is different, significant difference at α= 0.05 (between the thickness on the same diameter).

^*indicates significant difference at α= 0.05 (between the diameter on the same thickness).

Tables & Figures

REFERENCES

Citations

Citations to this article as recorded by

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

The comparison of relative reliability on biaxial and three point flexural strength testing methods of light curing composite resin

J Korean Acad Conserv Dent. 2006;31(1):58-65. Published online January 31, 2006

DOI: https://doi.org/10.5395/JKACD.2006.31.1.058

XML Download

Figure

The comparison of relative reliability on biaxial and three point flexural strength testing methods of light curing composite resin

Figure 1 Schematic illustration of three point flexure test.

Figure 2 Schematic illustration of piston-on-three-ball bi-axial flexure test.

Figure 3 Weibull modulus graph according to specimen thickness on 3.75 mm supporting ball radius (MICRONEW™, Bisco, Schaumburg, U.S.A.).

Figure 4 Weibull modulus graph according to specimen thickness on 5 mm supporting ball radius (MICRONEW™, Bisco, Schaumburg, U.S.A.).

Figure 5 Weibull modulus graph according to specimen thickness on 3.75 mm supporting ball radius (RENEW®, Bisco, Schaumburg, U.S.A.).

Figure 6 Weibull modulus graph according to specimen thickness on 5 mm supporting ball radius (RENEW®, Bisco, Schaumburg, U.S.A.).

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

The comparison of relative reliability on biaxial and three point flexural strength testing methods of light curing composite resin

Table 1

Light cured composite resin used in this study

Table 2

Mean flexure strength and Weibull modulus of three point flexure test and biaxial flexure test

If the alphabet is different, significant difference at α= 0.05 (between the thickness on the same diameter).

^*indicates significant difference at α= 0.05 (between the diameter on the same thickness).

Table 3

Mean flexure strength and Weibull modulus of three point flexure test and biaxial flexure test

If the alphabet is different, significant difference at α= 0.05 (between the thickness on the same diameter).

^*indicates significant difference at α= 0.05 (between the diameter on the same thickness).

Table 1 Light cured composite resin used in this study

Table 2 Mean flexure strength and Weibull modulus of three point flexure test and biaxial flexure test

If the alphabet is different, significant difference at α= 0.05 (between the thickness on the same diameter).

^*indicates significant difference at α= 0.05 (between the diameter on the same thickness).

Table 3 Mean flexure strength and Weibull modulus of three point flexure test and biaxial flexure test

If the alphabet is different, significant difference at α= 0.05 (between the thickness on the same diameter).

^*indicates significant difference at α= 0.05 (between the diameter on the same thickness).