Fracture loads and failure modes of customized and non-customized zirconia abutments

Izabela Cristina Maurício Moris, Yung-Chung Chen, Adriana Cláudia Lapria Faria, Ricardo Faria Ribeiro, Alex Sui Lun Fok, Renata Cristina Silveira Rodrigues

Research output: Contribution to journalArticle

Abstract

Objective: This study aimed to evaluate the fracture load and pattern of customized and non-customized zirconia abutments with Morse-taper connection. Methods: 18 implants were divided into 3 groups according to the abutments used: Zr — with non-customized zirconia abutments; Zrc — with customized zirconia abutments; and Ti — with titanium abutments. To test their load capacity, a universal test machine with a 500-kgf load cell and a 0.5-mm/min speed were used. After, one implant-abutment assembly from each group was analyzed by Scanning Electron Microscopy (SEM). For fractographic analysis, the specimens were transversely sectioned above the threads of the abutment screw in order to examine their fracture surfaces using SEM. Results: A significant difference was noted between the groups (Zr = 573.7 ± 11.66 N, Zrc = 768.0 ± 8.72 N and Ti = 659.1 ± 7.70 N). Also, the zirconia abutments fractured while the titanium abutments deformed plastically. Zrc presented fracture loads significantly higher than Zr (p = 0.009). All the zirconia abutments fractured below the implant platform, starting from the area of contact between the abutment and implant and propagating to the internal surface of the abutment. All the zirconia abutments presented complete cleavage in the mechanical test. Fractography detected differences in the position and pattern of fracture between the two groups with zirconia abutments, probably because of the different diameters in the transmucosal region. Significance: Customization of zirconia abutments did not affect their fracture loads, which were comparable to that of titanium and much higher than the maximum physiological limit for the anterior region of the maxilla.

Original languageEnglish
Pages (from-to)e197-e204
JournalDental Materials
Volume34
Issue number8
DOIs
Publication statusPublished - 2018 Aug 1

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Zirconia
Failure modes
Titanium
Electron Scanning Microscopy
Fractography
Scanning electron microscopy
zirconium oxide
Maxilla

All Science Journal Classification (ASJC) codes

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

Cite this

Moris, I. C. M., Chen, Y-C., Faria, A. C. L., Ribeiro, R. F., Fok, A. S. L., & Rodrigues, R. C. S. (2018). Fracture loads and failure modes of customized and non-customized zirconia abutments. Dental Materials, 34(8), e197-e204. https://doi.org/10.1016/j.dental.2018.04.005
Moris, Izabela Cristina Maurício ; Chen, Yung-Chung ; Faria, Adriana Cláudia Lapria ; Ribeiro, Ricardo Faria ; Fok, Alex Sui Lun ; Rodrigues, Renata Cristina Silveira. / Fracture loads and failure modes of customized and non-customized zirconia abutments. In: Dental Materials. 2018 ; Vol. 34, No. 8. pp. e197-e204.
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Moris, ICM, Chen, Y-C, Faria, ACL, Ribeiro, RF, Fok, ASL & Rodrigues, RCS 2018, 'Fracture loads and failure modes of customized and non-customized zirconia abutments', Dental Materials, vol. 34, no. 8, pp. e197-e204. https://doi.org/10.1016/j.dental.2018.04.005

Fracture loads and failure modes of customized and non-customized zirconia abutments. / Moris, Izabela Cristina Maurício; Chen, Yung-Chung; Faria, Adriana Cláudia Lapria; Ribeiro, Ricardo Faria; Fok, Alex Sui Lun; Rodrigues, Renata Cristina Silveira.

In: Dental Materials, Vol. 34, No. 8, 01.08.2018, p. e197-e204.

Research output: Contribution to journalArticle

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T1 - Fracture loads and failure modes of customized and non-customized zirconia abutments

AU - Moris, Izabela Cristina Maurício

AU - Chen, Yung-Chung

AU - Faria, Adriana Cláudia Lapria

AU - Ribeiro, Ricardo Faria

AU - Fok, Alex Sui Lun

AU - Rodrigues, Renata Cristina Silveira

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N2 - Objective: This study aimed to evaluate the fracture load and pattern of customized and non-customized zirconia abutments with Morse-taper connection. Methods: 18 implants were divided into 3 groups according to the abutments used: Zr — with non-customized zirconia abutments; Zrc — with customized zirconia abutments; and Ti — with titanium abutments. To test their load capacity, a universal test machine with a 500-kgf load cell and a 0.5-mm/min speed were used. After, one implant-abutment assembly from each group was analyzed by Scanning Electron Microscopy (SEM). For fractographic analysis, the specimens were transversely sectioned above the threads of the abutment screw in order to examine their fracture surfaces using SEM. Results: A significant difference was noted between the groups (Zr = 573.7 ± 11.66 N, Zrc = 768.0 ± 8.72 N and Ti = 659.1 ± 7.70 N). Also, the zirconia abutments fractured while the titanium abutments deformed plastically. Zrc presented fracture loads significantly higher than Zr (p = 0.009). All the zirconia abutments fractured below the implant platform, starting from the area of contact between the abutment and implant and propagating to the internal surface of the abutment. All the zirconia abutments presented complete cleavage in the mechanical test. Fractography detected differences in the position and pattern of fracture between the two groups with zirconia abutments, probably because of the different diameters in the transmucosal region. Significance: Customization of zirconia abutments did not affect their fracture loads, which were comparable to that of titanium and much higher than the maximum physiological limit for the anterior region of the maxilla.

AB - Objective: This study aimed to evaluate the fracture load and pattern of customized and non-customized zirconia abutments with Morse-taper connection. Methods: 18 implants were divided into 3 groups according to the abutments used: Zr — with non-customized zirconia abutments; Zrc — with customized zirconia abutments; and Ti — with titanium abutments. To test their load capacity, a universal test machine with a 500-kgf load cell and a 0.5-mm/min speed were used. After, one implant-abutment assembly from each group was analyzed by Scanning Electron Microscopy (SEM). For fractographic analysis, the specimens were transversely sectioned above the threads of the abutment screw in order to examine their fracture surfaces using SEM. Results: A significant difference was noted between the groups (Zr = 573.7 ± 11.66 N, Zrc = 768.0 ± 8.72 N and Ti = 659.1 ± 7.70 N). Also, the zirconia abutments fractured while the titanium abutments deformed plastically. Zrc presented fracture loads significantly higher than Zr (p = 0.009). All the zirconia abutments fractured below the implant platform, starting from the area of contact between the abutment and implant and propagating to the internal surface of the abutment. All the zirconia abutments presented complete cleavage in the mechanical test. Fractography detected differences in the position and pattern of fracture between the two groups with zirconia abutments, probably because of the different diameters in the transmucosal region. Significance: Customization of zirconia abutments did not affect their fracture loads, which were comparable to that of titanium and much higher than the maximum physiological limit for the anterior region of the maxilla.

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