Effects of two grading techniques of zirconia material on the fatigue limit of full-contour 3-unit fixed dental prostheses

Regina Furbino Villefort, Marina Amaral, Gabriel Kalil Rocha Pereira, Tiago Moreira Bastos Campos, Yu Zhang, Marco Antonio Bottino, Luiz Felipe Valandro, Renata Marques de Melo

Research output: Contribution to journalArticle

Abstract

Objective: This study evaluated the effects of two grading techniques of zirconia material on the fatigue limit of full-contour 3-unit fixed dental prostheses (FDPs). Methods: Presintered blocks of 3Y-TZP were milled to obtain sixty-nine 3-unit FDPs, which were divided into three groups (n = 23). The control group (CTL) was sintered and glazed following manufacturer's instructions. In the two experimental groups presintered FDPs received a surface silica/glass infiltration treatment before the sintering process. Silica sol-gel group (SSG) was graded by the sol-gel processing route, while the glass-zirconia-glass group (GZG) was graded by an enameling technique. Graded groups did not receive a glaze layer after sintering. All FDPs were then luted with a dual-curing resin cement on composite abutments, embedded in polyurethane and stored in water for five days. The initial load of the fatigue test was calculated based on the results of the monotonic testing applied on three specimens of each group. To determine the fatigue limit, 20 samples of each group were subjected to staircase testing (100,000 cycles/5. Hz). Results: The fatigue limits (in Newtons) were CTL = 1607.27, SSG = 1824.31, and GZG = 2006.57, and the Dixon and Mood test indicated statistically significant differences among groups (95% confidence interval) (GZG > SSG > CTL). Significance: The infiltration of silica and glass on bulk zirconia, by two different grading methods, increased the fatigue limits of monolithic zirconia FDPs.

Original languageEnglish (US)
JournalDental Materials
DOIs
StateAccepted/In press - Aug 18 2016

Fingerprint

Dental Prosthesis
Dental prostheses
Zirconia
Fatigue
Glass
Fatigue of materials
Silicon Dioxide
Polymethyl Methacrylate
Sol-gels
Silica
Silica Gel
Infiltration
Control Groups
Self-Curing of Dental Resins
Sintering
Enameling
Resin Cements
Glazes
Polyurethanes
Testing

Keywords

  • Fatigue
  • Fixed dental prostheses
  • Mechanical
  • Silicon dioxide
  • Stress
  • Zirconium

ASJC Scopus subject areas

  • Materials Science(all)
  • Dentistry(all)
  • Mechanics of Materials

Cite this

Effects of two grading techniques of zirconia material on the fatigue limit of full-contour 3-unit fixed dental prostheses. / Villefort, Regina Furbino; Amaral, Marina; Pereira, Gabriel Kalil Rocha; Campos, Tiago Moreira Bastos; Zhang, Yu; Bottino, Marco Antonio; Valandro, Luiz Felipe; de Melo, Renata Marques.

In: Dental Materials, 18.08.2016.

Research output: Contribution to journalArticle

Villefort, Regina Furbino ; Amaral, Marina ; Pereira, Gabriel Kalil Rocha ; Campos, Tiago Moreira Bastos ; Zhang, Yu ; Bottino, Marco Antonio ; Valandro, Luiz Felipe ; de Melo, Renata Marques. / Effects of two grading techniques of zirconia material on the fatigue limit of full-contour 3-unit fixed dental prostheses. In: Dental Materials. 2016.
@article{8da756af59bc4a638b278f1d3c300922,
title = "Effects of two grading techniques of zirconia material on the fatigue limit of full-contour 3-unit fixed dental prostheses",
abstract = "Objective: This study evaluated the effects of two grading techniques of zirconia material on the fatigue limit of full-contour 3-unit fixed dental prostheses (FDPs). Methods: Presintered blocks of 3Y-TZP were milled to obtain sixty-nine 3-unit FDPs, which were divided into three groups (n = 23). The control group (CTL) was sintered and glazed following manufacturer's instructions. In the two experimental groups presintered FDPs received a surface silica/glass infiltration treatment before the sintering process. Silica sol-gel group (SSG) was graded by the sol-gel processing route, while the glass-zirconia-glass group (GZG) was graded by an enameling technique. Graded groups did not receive a glaze layer after sintering. All FDPs were then luted with a dual-curing resin cement on composite abutments, embedded in polyurethane and stored in water for five days. The initial load of the fatigue test was calculated based on the results of the monotonic testing applied on three specimens of each group. To determine the fatigue limit, 20 samples of each group were subjected to staircase testing (100,000 cycles/5. Hz). Results: The fatigue limits (in Newtons) were CTL = 1607.27, SSG = 1824.31, and GZG = 2006.57, and the Dixon and Mood test indicated statistically significant differences among groups (95{\%} confidence interval) (GZG > SSG > CTL). Significance: The infiltration of silica and glass on bulk zirconia, by two different grading methods, increased the fatigue limits of monolithic zirconia FDPs.",
keywords = "Fatigue, Fixed dental prostheses, Mechanical, Silicon dioxide, Stress, Zirconium",
author = "Villefort, {Regina Furbino} and Marina Amaral and Pereira, {Gabriel Kalil Rocha} and Campos, {Tiago Moreira Bastos} and Yu Zhang and Bottino, {Marco Antonio} and Valandro, {Luiz Felipe} and {de Melo}, {Renata Marques}",
year = "2016",
month = "8",
day = "18",
doi = "10.1016/j.dental.2016.12.010",
language = "English (US)",
journal = "Dental Materials",
issn = "0109-5641",
publisher = "Elsevier Science",

}

TY - JOUR

T1 - Effects of two grading techniques of zirconia material on the fatigue limit of full-contour 3-unit fixed dental prostheses

AU - Villefort, Regina Furbino

AU - Amaral, Marina

AU - Pereira, Gabriel Kalil Rocha

AU - Campos, Tiago Moreira Bastos

AU - Zhang, Yu

AU - Bottino, Marco Antonio

AU - Valandro, Luiz Felipe

AU - de Melo, Renata Marques

PY - 2016/8/18

Y1 - 2016/8/18

N2 - Objective: This study evaluated the effects of two grading techniques of zirconia material on the fatigue limit of full-contour 3-unit fixed dental prostheses (FDPs). Methods: Presintered blocks of 3Y-TZP were milled to obtain sixty-nine 3-unit FDPs, which were divided into three groups (n = 23). The control group (CTL) was sintered and glazed following manufacturer's instructions. In the two experimental groups presintered FDPs received a surface silica/glass infiltration treatment before the sintering process. Silica sol-gel group (SSG) was graded by the sol-gel processing route, while the glass-zirconia-glass group (GZG) was graded by an enameling technique. Graded groups did not receive a glaze layer after sintering. All FDPs were then luted with a dual-curing resin cement on composite abutments, embedded in polyurethane and stored in water for five days. The initial load of the fatigue test was calculated based on the results of the monotonic testing applied on three specimens of each group. To determine the fatigue limit, 20 samples of each group were subjected to staircase testing (100,000 cycles/5. Hz). Results: The fatigue limits (in Newtons) were CTL = 1607.27, SSG = 1824.31, and GZG = 2006.57, and the Dixon and Mood test indicated statistically significant differences among groups (95% confidence interval) (GZG > SSG > CTL). Significance: The infiltration of silica and glass on bulk zirconia, by two different grading methods, increased the fatigue limits of monolithic zirconia FDPs.

AB - Objective: This study evaluated the effects of two grading techniques of zirconia material on the fatigue limit of full-contour 3-unit fixed dental prostheses (FDPs). Methods: Presintered blocks of 3Y-TZP were milled to obtain sixty-nine 3-unit FDPs, which were divided into three groups (n = 23). The control group (CTL) was sintered and glazed following manufacturer's instructions. In the two experimental groups presintered FDPs received a surface silica/glass infiltration treatment before the sintering process. Silica sol-gel group (SSG) was graded by the sol-gel processing route, while the glass-zirconia-glass group (GZG) was graded by an enameling technique. Graded groups did not receive a glaze layer after sintering. All FDPs were then luted with a dual-curing resin cement on composite abutments, embedded in polyurethane and stored in water for five days. The initial load of the fatigue test was calculated based on the results of the monotonic testing applied on three specimens of each group. To determine the fatigue limit, 20 samples of each group were subjected to staircase testing (100,000 cycles/5. Hz). Results: The fatigue limits (in Newtons) were CTL = 1607.27, SSG = 1824.31, and GZG = 2006.57, and the Dixon and Mood test indicated statistically significant differences among groups (95% confidence interval) (GZG > SSG > CTL). Significance: The infiltration of silica and glass on bulk zirconia, by two different grading methods, increased the fatigue limits of monolithic zirconia FDPs.

KW - Fatigue

KW - Fixed dental prostheses

KW - Mechanical

KW - Silicon dioxide

KW - Stress

KW - Zirconium

UR - http://www.scopus.com/inward/record.url?scp=85009981759&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85009981759&partnerID=8YFLogxK

U2 - 10.1016/j.dental.2016.12.010

DO - 10.1016/j.dental.2016.12.010

M3 - Article

JO - Dental Materials

JF - Dental Materials

SN - 0109-5641

ER -