Comparative Evaluation of Microgap at the Interface of Titanium and Zirconium Abutments Following Oblique Cyclic Loading: An in vitro Study

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Mazaheri Azita; Nourbaksh Mehran; Jalalian Ezatolha; Zarbakh Arash; Hamzehkhosroshahi Hadi

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Journal: JOURNAL OF RESEARCH IN DENTAL SCIENCES Year:2019 | Volume:16 | Issue:2 (60) Page(s): 87-96

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Title

Comparative Evaluation of Microgap at the Interface of Titanium and Zirconium Abutments Following Oblique Cyclic Loading: An in vitro Study

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Keywords

GapQ1

Titanium alloyQ1

ZirconiumQ1

Implant abutmentQ1

Abstract

Background and Aim: MicroGap in the implant-abutment interface is one of the main challenges in the treatment of two-piece implants. This study aimed to investigate the effect of two types of abutments (zirconia and titanium) on microGap at implant-abutment interface area under oblique cyclic loading in vitro. Methods and Materials In this in vitro study, 12 implant-abutment assemblies were used, each containing six sets with either zirconia or titanium abutments and vertically mounted in the modified resin blocks of auto-polymerized polyester base. The specimens were then subjected to oblique cyclic loading of 75 N at a 30 ± 2 degrees angle to the longitudinal axis of the implant with a frequency of 1 Hz in 500, 000 cycles, equivalent to 20 months of human mastication. For the microGap analysis, direct observation from the top was used with a scanning electron microscopy (SEM) with a magnification of 5000×. Statistical analysis was used to compare the microGap before and after the application of loading with the paired t-test. Results: The amount of microGap before force application in the titanium abutment group was (2. 6± 0. 7) significantly higher than the zirconia abutments (1. 9± 0. 5) (P = 0. 033). The dimension of the microGap in the titanium abutment group significantly decreased following cyclic loading (P = 0. 047), but in the zirconia group showed a significant increase (P = 0. 035). Finally, the dimension of the microGap following oblique cyclic loading in the titanium abutment group (2. 0± 0. 8) was not significantly different with the zirconia abutments (2. 7± 0. 9) (P = 0. 262). Conclusion: The difference of microGap after oblique cyclic loading between two types of titanium abutment and Zirconium abutment is not significant, and both are clinically acceptable.

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APA: Copy

Mazaheri, Azita, Nourbaksh, Mehran, Jalalian, Ezatolha, Zarbakh, Arash, & Hamzehkhosroshahi, Hadi. (2019). Comparative Evaluation of Microgap at the Interface of Titanium and Zirconium Abutments Following Oblique Cyclic Loading: An in vitro Study. JOURNAL OF RESEARCH IN DENTAL SCIENCES, 16(2 (60) ), 87-96. SID. https://sid.ir/paper/184483/en

Vancouver: Copy

Mazaheri Azita, Nourbaksh Mehran, Jalalian Ezatolha, Zarbakh Arash, Hamzehkhosroshahi Hadi. Comparative Evaluation of Microgap at the Interface of Titanium and Zirconium Abutments Following Oblique Cyclic Loading: An in vitro Study. JOURNAL OF RESEARCH IN DENTAL SCIENCES[Internet]. 2019;16(2 (60) ):87-96. Available from: https://sid.ir/paper/184483/en

IEEE: Copy

Azita Mazaheri, Mehran Nourbaksh, Ezatolha Jalalian, Arash Zarbakh, and Hadi Hamzehkhosroshahi, “Comparative Evaluation of Microgap at the Interface of Titanium and Zirconium Abutments Following Oblique Cyclic Loading: An in vitro Study,” JOURNAL OF RESEARCH IN DENTAL SCIENCES, vol. 16, no. 2 (60) , pp. 87–96, 2019, [Online]. Available: https://sid.ir/paper/184483/en

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