Reliability testing of indirect composites as single implant restorations

Marcelo Suzuki, Estevam Bonfante, Nelson Rfa Silva, Paulo Coelho

Research output: Contribution to journalArticle

Abstract

Purpose: To investigate the reliability and failure modes of indirect composites as single-unit implant crowns. Materials and Methods: Thirty-eight custom-milled titanium alloy locking-taper abutments were divided into two groups (n = 19 each), and crown build-up of a mandibular molar was accomplished using two indirect composite systems (Ceramage, Shofu, Kyoto, Japan; Diamond Crown, DRM, Branford, CT). Three crowns of each material were loaded until failure for determination of the step-stress profiles. Reliability testing started at a load 30% of the mean load to failure and used three profiles with increasing fatigue loading (step stress). Weibull curves with 300 N stress and 90% confidence intervals were calculated and plotted using a power-law relationship. Weibull modulus "Beta" and characteristic strength "Eta" were identified, and a contour plot was used (Beta vs. Eta) for examining differences between groups. Specimens were inspected in polarized light and scanning electron microscope for fracture analysis. Results: Use level Weibull probability showed fatigue being a damage factor only for the Ceramage group (β= 3.39) but not for the Diamond Crown group (β= 0.40). Overlap in the confidence bounds resulted in no statistical difference. Irrespective of composite system, fracture initiated in the region immediately below the contact between the indenter and the cusp, with the crack propagating toward the margins of cohesive failure. Conclusions: No significant differences were observed in life and Weibull probability calculations for Ceramage and Diamond Crown veneered onto Ti alloy abutments. Failure modes comprised composite veneer chippings.

Original languageEnglish (US)
Pages (from-to)528-534
Number of pages7
JournalJournal of Prosthodontics
Volume20
Issue number7
DOIs
StatePublished - Oct 2011

Fingerprint

Crowns
Fatigue
Titanium
Japan
Electrons
Confidence Intervals
Light
ceramage
Diamond Crown

Keywords

  • Fatigue
  • Implant-supported crowns
  • Integrated Abutment Crown
  • Resin composite

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Reliability testing of indirect composites as single implant restorations. / Suzuki, Marcelo; Bonfante, Estevam; Silva, Nelson Rfa; Coelho, Paulo.

In: Journal of Prosthodontics, Vol. 20, No. 7, 10.2011, p. 528-534.

Research output: Contribution to journalArticle

Suzuki, Marcelo ; Bonfante, Estevam ; Silva, Nelson Rfa ; Coelho, Paulo. / Reliability testing of indirect composites as single implant restorations. In: Journal of Prosthodontics. 2011 ; Vol. 20, No. 7. pp. 528-534.
@article{4c6531d174fd45b88ee85f76008a9b1f,
title = "Reliability testing of indirect composites as single implant restorations",
abstract = "Purpose: To investigate the reliability and failure modes of indirect composites as single-unit implant crowns. Materials and Methods: Thirty-eight custom-milled titanium alloy locking-taper abutments were divided into two groups (n = 19 each), and crown build-up of a mandibular molar was accomplished using two indirect composite systems (Ceramage, Shofu, Kyoto, Japan; Diamond Crown, DRM, Branford, CT). Three crowns of each material were loaded until failure for determination of the step-stress profiles. Reliability testing started at a load 30{\%} of the mean load to failure and used three profiles with increasing fatigue loading (step stress). Weibull curves with 300 N stress and 90{\%} confidence intervals were calculated and plotted using a power-law relationship. Weibull modulus {"}Beta{"} and characteristic strength {"}Eta{"} were identified, and a contour plot was used (Beta vs. Eta) for examining differences between groups. Specimens were inspected in polarized light and scanning electron microscope for fracture analysis. Results: Use level Weibull probability showed fatigue being a damage factor only for the Ceramage group (β= 3.39) but not for the Diamond Crown group (β= 0.40). Overlap in the confidence bounds resulted in no statistical difference. Irrespective of composite system, fracture initiated in the region immediately below the contact between the indenter and the cusp, with the crack propagating toward the margins of cohesive failure. Conclusions: No significant differences were observed in life and Weibull probability calculations for Ceramage and Diamond Crown veneered onto Ti alloy abutments. Failure modes comprised composite veneer chippings.",
keywords = "Fatigue, Implant-supported crowns, Integrated Abutment Crown, Resin composite",
author = "Marcelo Suzuki and Estevam Bonfante and Silva, {Nelson Rfa} and Paulo Coelho",
year = "2011",
month = "10",
doi = "10.1111/j.1532-849X.2011.00754.x",
language = "English (US)",
volume = "20",
pages = "528--534",
journal = "Journal of Prosthodontics",
issn = "1059-941X",
publisher = "Wiley-Blackwell",
number = "7",

}

TY - JOUR

T1 - Reliability testing of indirect composites as single implant restorations

AU - Suzuki, Marcelo

AU - Bonfante, Estevam

AU - Silva, Nelson Rfa

AU - Coelho, Paulo

PY - 2011/10

Y1 - 2011/10

N2 - Purpose: To investigate the reliability and failure modes of indirect composites as single-unit implant crowns. Materials and Methods: Thirty-eight custom-milled titanium alloy locking-taper abutments were divided into two groups (n = 19 each), and crown build-up of a mandibular molar was accomplished using two indirect composite systems (Ceramage, Shofu, Kyoto, Japan; Diamond Crown, DRM, Branford, CT). Three crowns of each material were loaded until failure for determination of the step-stress profiles. Reliability testing started at a load 30% of the mean load to failure and used three profiles with increasing fatigue loading (step stress). Weibull curves with 300 N stress and 90% confidence intervals were calculated and plotted using a power-law relationship. Weibull modulus "Beta" and characteristic strength "Eta" were identified, and a contour plot was used (Beta vs. Eta) for examining differences between groups. Specimens were inspected in polarized light and scanning electron microscope for fracture analysis. Results: Use level Weibull probability showed fatigue being a damage factor only for the Ceramage group (β= 3.39) but not for the Diamond Crown group (β= 0.40). Overlap in the confidence bounds resulted in no statistical difference. Irrespective of composite system, fracture initiated in the region immediately below the contact between the indenter and the cusp, with the crack propagating toward the margins of cohesive failure. Conclusions: No significant differences were observed in life and Weibull probability calculations for Ceramage and Diamond Crown veneered onto Ti alloy abutments. Failure modes comprised composite veneer chippings.

AB - Purpose: To investigate the reliability and failure modes of indirect composites as single-unit implant crowns. Materials and Methods: Thirty-eight custom-milled titanium alloy locking-taper abutments were divided into two groups (n = 19 each), and crown build-up of a mandibular molar was accomplished using two indirect composite systems (Ceramage, Shofu, Kyoto, Japan; Diamond Crown, DRM, Branford, CT). Three crowns of each material were loaded until failure for determination of the step-stress profiles. Reliability testing started at a load 30% of the mean load to failure and used three profiles with increasing fatigue loading (step stress). Weibull curves with 300 N stress and 90% confidence intervals were calculated and plotted using a power-law relationship. Weibull modulus "Beta" and characteristic strength "Eta" were identified, and a contour plot was used (Beta vs. Eta) for examining differences between groups. Specimens were inspected in polarized light and scanning electron microscope for fracture analysis. Results: Use level Weibull probability showed fatigue being a damage factor only for the Ceramage group (β= 3.39) but not for the Diamond Crown group (β= 0.40). Overlap in the confidence bounds resulted in no statistical difference. Irrespective of composite system, fracture initiated in the region immediately below the contact between the indenter and the cusp, with the crack propagating toward the margins of cohesive failure. Conclusions: No significant differences were observed in life and Weibull probability calculations for Ceramage and Diamond Crown veneered onto Ti alloy abutments. Failure modes comprised composite veneer chippings.

KW - Fatigue

KW - Implant-supported crowns

KW - Integrated Abutment Crown

KW - Resin composite

UR - http://www.scopus.com/inward/record.url?scp=80054703478&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80054703478&partnerID=8YFLogxK

U2 - 10.1111/j.1532-849X.2011.00754.x

DO - 10.1111/j.1532-849X.2011.00754.x

M3 - Article

VL - 20

SP - 528

EP - 534

JO - Journal of Prosthodontics

JF - Journal of Prosthodontics

SN - 1059-941X

IS - 7

ER -