In vitro fracture resistance of fiber reinforced cusp-replacing composite restorations

Willem M.M. Fennis; Arzu Tezvergil; Ruud H. Kuijs; Lippo V.J. Lassila; Cees M. Kreulen; Nico H.J. Creugers; Pekka K. Vallittu

doi:10.1016/j.dental.2004.07.019

In vitro fracture resistance of fiber reinforced cusp-replacing composite restorations

Willem M.M. Fennis^*
, Arzu Tezvergil
, Ruud H. Kuijs
, Lippo V.J. Lassila
, Cees M. Kreulen
, Nico H.J. Creugers
, Pekka K. Vallittu

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

70 Citations (Scopus)

Abstract

To assess the fracture resistance and failure mode of fiber reinforced composite (FRC) cusp-replacing restorations in premolars. Forty-five extracted sound upper premolars were randomly divided into three groups. Identical MOD cavities with simulated buccal cusp fracture and height reduction of the palatal cusp were prepared. In Group A two layers of resin impregnated woven continuous FRC (EverStick Net) were applied. In Group B one layer of unidirectional continuous FRC (EverStick) was used. In Group C no fibers were applied (control). Subsequently, all teeth were restored with resin composite (Clearfil Photo Posterior), subjected to thermocycling (6000×5-55 °C) and static load tests. Load until fracture was registered for each tooth. Simultaneously, fracture propagation was monitored using acoustic emission analysis (AE). Failure modes were visually assessed. Weibull analysis revealed a characteristic strength and Weibull modulus (m) at 2364.8 N for Group A (m=8.9), 2437.9 N for Group B (m=5.9) and 2160.3 N for Group C (m=13.6). Fracture loads were not significantly different (ANOVA, p>0.05). Teeth with FRC showed less fractures below the cemento-enamel junction (CEJ) (38% and 23% for Groups A and B, respectively) than teeth without FRC (93%) (chi-square, p<0.05). The control group showed the least AE energy signals. The results suggest that glass FRC does not increase fracture load of premolars with cusp-replacing restorations. However, FRC has a beneficial effect on the failure mode. Woven fibers give more consistent results than unidirectional fibers.

Original language	English
Pages (from-to)	565-572
Number of pages	8
Journal	Dental Materials
Volume	21
Issue number	6
DOIs	https://doi.org/10.1016/j.dental.2004.07.019
Publication status	Published - Jun 2005
Externally published	Yes

Keywords

Acoustic emission
Cusp fracture
Cusp-replacing restoration
Cuspal coverage
Dental materials
Failure mode
Fiber reinforced composite
Fracture resistance
Prosthodontics
Resin composite
Restorative dentistry

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10.1016/j.dental.2004.07.019

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@article{e1d02acd4871424aac316b778b25f826,

title = "In vitro fracture resistance of fiber reinforced cusp-replacing composite restorations",

abstract = "To assess the fracture resistance and failure mode of fiber reinforced composite (FRC) cusp-replacing restorations in premolars. Forty-five extracted sound upper premolars were randomly divided into three groups. Identical MOD cavities with simulated buccal cusp fracture and height reduction of the palatal cusp were prepared. In Group A two layers of resin impregnated woven continuous FRC (EverStick Net) were applied. In Group B one layer of unidirectional continuous FRC (EverStick) was used. In Group C no fibers were applied (control). Subsequently, all teeth were restored with resin composite (Clearfil Photo Posterior), subjected to thermocycling (6000×5-55 °C) and static load tests. Load until fracture was registered for each tooth. Simultaneously, fracture propagation was monitored using acoustic emission analysis (AE). Failure modes were visually assessed. Weibull analysis revealed a characteristic strength and Weibull modulus (m) at 2364.8 N for Group A (m=8.9), 2437.9 N for Group B (m=5.9) and 2160.3 N for Group C (m=13.6). Fracture loads were not significantly different (ANOVA, p>0.05). Teeth with FRC showed less fractures below the cemento-enamel junction (CEJ) (38\% and 23\% for Groups A and B, respectively) than teeth without FRC (93\%) (chi-square, p<0.05). The control group showed the least AE energy signals. The results suggest that glass FRC does not increase fracture load of premolars with cusp-replacing restorations. However, FRC has a beneficial effect on the failure mode. Woven fibers give more consistent results than unidirectional fibers.",

keywords = "Acoustic emission, Cusp fracture, Cusp-replacing restoration, Cuspal coverage, Dental materials, Failure mode, Fiber reinforced composite, Fracture resistance, Prosthodontics, Resin composite, Restorative dentistry",

author = "Fennis, \{Willem M.M.\} and Arzu Tezvergil and Kuijs, \{Ruud H.\} and Lassila, \{Lippo V.J.\} and Kreulen, \{Cees M.\} and Creugers, \{Nico H.J.\} and Vallittu, \{Pekka K.\}",

note = "Funding Information: This study was supported by the University Medical Centre Nijmegen and is part of the research program “Oral Disease and Musculo-Skeletal Disorders” of the Faculty of Medical Sciences of the University Medical Centre Nijmegen, which was acknowledged by the Royal Dutch Academy of Science in 1996. The study was also supported by the Finnish National Technology Agency (TEKES) and the Centre of Excellence of Nano- and Biopolymers Research Group by the Finnish Academy. The authors wish to thank J.E. de Ruijter and J.G.C. Wolke for their contribution to this project.",

year = "2005",

month = jun,

doi = "10.1016/j.dental.2004.07.019",

language = "English",

volume = "21",

pages = "565--572",

journal = "Dental Materials",

issn = "0109-5641",

publisher = "Elsevier",

number = "6",

}

TY - JOUR

T1 - In vitro fracture resistance of fiber reinforced cusp-replacing composite restorations

AU - Fennis, Willem M.M.

AU - Tezvergil, Arzu

AU - Kuijs, Ruud H.

AU - Lassila, Lippo V.J.

AU - Kreulen, Cees M.

AU - Creugers, Nico H.J.

AU - Vallittu, Pekka K.

N1 - Funding Information: This study was supported by the University Medical Centre Nijmegen and is part of the research program “Oral Disease and Musculo-Skeletal Disorders” of the Faculty of Medical Sciences of the University Medical Centre Nijmegen, which was acknowledged by the Royal Dutch Academy of Science in 1996. The study was also supported by the Finnish National Technology Agency (TEKES) and the Centre of Excellence of Nano- and Biopolymers Research Group by the Finnish Academy. The authors wish to thank J.E. de Ruijter and J.G.C. Wolke for their contribution to this project.

PY - 2005/6

Y1 - 2005/6

N2 - To assess the fracture resistance and failure mode of fiber reinforced composite (FRC) cusp-replacing restorations in premolars. Forty-five extracted sound upper premolars were randomly divided into three groups. Identical MOD cavities with simulated buccal cusp fracture and height reduction of the palatal cusp were prepared. In Group A two layers of resin impregnated woven continuous FRC (EverStick Net) were applied. In Group B one layer of unidirectional continuous FRC (EverStick) was used. In Group C no fibers were applied (control). Subsequently, all teeth were restored with resin composite (Clearfil Photo Posterior), subjected to thermocycling (6000×5-55 °C) and static load tests. Load until fracture was registered for each tooth. Simultaneously, fracture propagation was monitored using acoustic emission analysis (AE). Failure modes were visually assessed. Weibull analysis revealed a characteristic strength and Weibull modulus (m) at 2364.8 N for Group A (m=8.9), 2437.9 N for Group B (m=5.9) and 2160.3 N for Group C (m=13.6). Fracture loads were not significantly different (ANOVA, p>0.05). Teeth with FRC showed less fractures below the cemento-enamel junction (CEJ) (38% and 23% for Groups A and B, respectively) than teeth without FRC (93%) (chi-square, p<0.05). The control group showed the least AE energy signals. The results suggest that glass FRC does not increase fracture load of premolars with cusp-replacing restorations. However, FRC has a beneficial effect on the failure mode. Woven fibers give more consistent results than unidirectional fibers.

AB - To assess the fracture resistance and failure mode of fiber reinforced composite (FRC) cusp-replacing restorations in premolars. Forty-five extracted sound upper premolars were randomly divided into three groups. Identical MOD cavities with simulated buccal cusp fracture and height reduction of the palatal cusp were prepared. In Group A two layers of resin impregnated woven continuous FRC (EverStick Net) were applied. In Group B one layer of unidirectional continuous FRC (EverStick) was used. In Group C no fibers were applied (control). Subsequently, all teeth were restored with resin composite (Clearfil Photo Posterior), subjected to thermocycling (6000×5-55 °C) and static load tests. Load until fracture was registered for each tooth. Simultaneously, fracture propagation was monitored using acoustic emission analysis (AE). Failure modes were visually assessed. Weibull analysis revealed a characteristic strength and Weibull modulus (m) at 2364.8 N for Group A (m=8.9), 2437.9 N for Group B (m=5.9) and 2160.3 N for Group C (m=13.6). Fracture loads were not significantly different (ANOVA, p>0.05). Teeth with FRC showed less fractures below the cemento-enamel junction (CEJ) (38% and 23% for Groups A and B, respectively) than teeth without FRC (93%) (chi-square, p<0.05). The control group showed the least AE energy signals. The results suggest that glass FRC does not increase fracture load of premolars with cusp-replacing restorations. However, FRC has a beneficial effect on the failure mode. Woven fibers give more consistent results than unidirectional fibers.

KW - Acoustic emission

KW - Cusp fracture

KW - Cusp-replacing restoration

KW - Cuspal coverage

KW - Dental materials

KW - Failure mode

KW - Fiber reinforced composite

KW - Fracture resistance

KW - Prosthodontics

KW - Resin composite

KW - Restorative dentistry

UR - https://www.scopus.com/pages/publications/18544387440

U2 - 10.1016/j.dental.2004.07.019

DO - 10.1016/j.dental.2004.07.019

M3 - Article

C2 - 15904700

AN - SCOPUS:18544387440

SN - 0109-5641

VL - 21

SP - 565

EP - 572

JO - Dental Materials

JF - Dental Materials

IS - 6

ER -

In vitro fracture resistance of fiber reinforced cusp-replacing composite restorations

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Keywords

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