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Effect of fatigue loading on the fracture strength and failure mode of lithium disilicate and zirconia implant abutments.
Clin Oral Implants Res. 2018 Jan; 29(1):20-27.CO

Abstract

OBJECTIVE

The aim of this study was to test five types of implant restorations using titanium, zirconia and lithium disilicate abutments after being subjected to long-term fatigue loading.

MATERIALS AND METHODS

Forty single-tooth implant restorations were assembled on titanium implants (FairTwo; FairImplant). The restorations differed only in the type of abutment used and were divided into five groups [Ti: titanium; Zr: zirconia with no metal base; ZrT: zirconia with titanium base; LaT: lithium disilicate abutment with titanium base; and LcT: lithium disilicate hybrid-abutment-crown with titanium base]. Specimens were subjected to dynamic load of 49 N up to 1,200,000 cycles using a dual-axis chewing simulator (Kausimulator; Willytech). The surviving specimens were subjected to quasi-static loading using a universal testing machine (Z010; Zwick) until the implant-abutment connection failed. The values of force (N) at which fracture or plastic deformation of the restoration occurred were calculated and the rate of deformation was analyzed. The data was then analyzed using Mann-Whitney tests.

RESULTS

Groups Ti, ZrT, LaT and LcT withstood 1,200,000 fatigue load cycles and higher forces than physiological occlusal forces without fracture or debonding of the ceramic suprastructure. In group Zr, some specimen did not survive the chewing simulation and this group showed the lowest resistance to failure with a median of 198 N.

CONCLUSIONS

Within the limitations of this study, it could be concluded that lithium disilicate abutments and hybrid-abutment-crowns show promising durability and strength after long-term dynamic loading. The use of titanium base enhances the strength of the zirconia abutments.

Authors+Show Affiliations

Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel, Germany.Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel, Germany.Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel, Germany.Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel, Germany.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28664585

Citation

Elsayed, Adham, et al. "Effect of Fatigue Loading On the Fracture Strength and Failure Mode of Lithium Disilicate and Zirconia Implant Abutments." Clinical Oral Implants Research, vol. 29, no. 1, 2018, pp. 20-27.
Elsayed A, Wille S, Al-Akhali M, et al. Effect of fatigue loading on the fracture strength and failure mode of lithium disilicate and zirconia implant abutments. Clin Oral Implants Res. 2018;29(1):20-27.
Elsayed, A., Wille, S., Al-Akhali, M., & Kern, M. (2018). Effect of fatigue loading on the fracture strength and failure mode of lithium disilicate and zirconia implant abutments. Clinical Oral Implants Research, 29(1), 20-27. https://doi.org/10.1111/clr.13034
Elsayed A, et al. Effect of Fatigue Loading On the Fracture Strength and Failure Mode of Lithium Disilicate and Zirconia Implant Abutments. Clin Oral Implants Res. 2018;29(1):20-27. PubMed PMID: 28664585.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of fatigue loading on the fracture strength and failure mode of lithium disilicate and zirconia implant abutments. AU - Elsayed,Adham, AU - Wille,Sebastian, AU - Al-Akhali,Majed, AU - Kern,Matthias, Y1 - 2017/06/30/ PY - 2017/05/30/accepted PY - 2017/7/1/pubmed PY - 2018/8/14/medline PY - 2017/7/1/entrez KW - ceramic abutments KW - fatigue loading KW - implant abutments KW - lithium disilicate KW - zirconia SP - 20 EP - 27 JF - Clinical oral implants research JO - Clin Oral Implants Res VL - 29 IS - 1 N2 - OBJECTIVE: The aim of this study was to test five types of implant restorations using titanium, zirconia and lithium disilicate abutments after being subjected to long-term fatigue loading. MATERIALS AND METHODS: Forty single-tooth implant restorations were assembled on titanium implants (FairTwo; FairImplant). The restorations differed only in the type of abutment used and were divided into five groups [Ti: titanium; Zr: zirconia with no metal base; ZrT: zirconia with titanium base; LaT: lithium disilicate abutment with titanium base; and LcT: lithium disilicate hybrid-abutment-crown with titanium base]. Specimens were subjected to dynamic load of 49 N up to 1,200,000 cycles using a dual-axis chewing simulator (Kausimulator; Willytech). The surviving specimens were subjected to quasi-static loading using a universal testing machine (Z010; Zwick) until the implant-abutment connection failed. The values of force (N) at which fracture or plastic deformation of the restoration occurred were calculated and the rate of deformation was analyzed. The data was then analyzed using Mann-Whitney tests. RESULTS: Groups Ti, ZrT, LaT and LcT withstood 1,200,000 fatigue load cycles and higher forces than physiological occlusal forces without fracture or debonding of the ceramic suprastructure. In group Zr, some specimen did not survive the chewing simulation and this group showed the lowest resistance to failure with a median of 198 N. CONCLUSIONS: Within the limitations of this study, it could be concluded that lithium disilicate abutments and hybrid-abutment-crowns show promising durability and strength after long-term dynamic loading. The use of titanium base enhances the strength of the zirconia abutments. SN - 1600-0501 UR - https://www.unboundmedicine.com/medline/citation/28664585/Effect_of_fatigue_loading_on_the_fracture_strength_and_failure_mode_of_lithium_disilicate_and_zirconia_implant_abutments_ L2 - https://doi.org/10.1111/clr.13034 DB - PRIME DP - Unbound Medicine ER -