Abstract:ResumoContexto: O estudo do fenômeno de fadiga é essencial porque as falhas de implantes geralmente são causadas por este processo. Objetivo: O objetivo deste estudo foi analisar a resistência à fadiga de conjuntos de pilares retos e anatômicos que foram submetidos a cargas cíclicas. Material e método: Foram utilizados 37 implantes cone Morse e 37 pilares, divididos em dois grupos (n = 16: pilares retos, n = 21: pilares anatômicos). Os conjuntos foram submetidos à carga cíclica (5.000.000) usando o equipamento… Show more
“…According to previous study, there was no different bending moment between anatomical abutment and straight abutment. However, it was found that the longevity of anatomical abutment after fatigue test was lower than the straight abutment group [40]. In this study, both a customized titanium abutment and hybrid abutment were created with anatomical design; the connection for abutments was made with the same manufacturing.…”
Purpose
The aim of this study was to compare removal torque values after mechanical cyclic loading and bending moment after the static compression testing of customized titanium abutment compared with prefabricated and hybrid abutments.
Materials and methods
The study was developed according to ISO 14801:2016. Sixty implants were divided into three groups equally: Straight titanium abutment group, Customized titanium abutment group, and Hybrid zirconia abutment group. Abutments were fabricated with zirconia restoration. Forty five implants underwent for cyclic loading. The removal torque values were measured after a fatigue test was conducted at 0 cycles (control), 50,000 cycles and 1,000,000 cycles. In the second experiment, 15 implants were divided into the same groups. Then, bending moments were investigated.
Results
The mean initial removal torque value was significantly higher than 50,000 cycles and 1,000,000 cycles (P < 0.001). The comparison of mean removal torque value between types of abutments was not significantly different (P > 0.05), and the bending moments of all abutments were not significantly different (P > 0.05).
Conclusions
From the boundary of this in-vitro study, it could be concluded that customized titanium abutment and hybrid abutment were not significantly different in terms of removal torque values after the fatigue test. The bending moment between types of abutment were not significantly different. Thus, it could be concluded that abutment type does not significantly influence abutment stability or fracture strength.
“…According to previous study, there was no different bending moment between anatomical abutment and straight abutment. However, it was found that the longevity of anatomical abutment after fatigue test was lower than the straight abutment group [40]. In this study, both a customized titanium abutment and hybrid abutment were created with anatomical design; the connection for abutments was made with the same manufacturing.…”
Purpose
The aim of this study was to compare removal torque values after mechanical cyclic loading and bending moment after the static compression testing of customized titanium abutment compared with prefabricated and hybrid abutments.
Materials and methods
The study was developed according to ISO 14801:2016. Sixty implants were divided into three groups equally: Straight titanium abutment group, Customized titanium abutment group, and Hybrid zirconia abutment group. Abutments were fabricated with zirconia restoration. Forty five implants underwent for cyclic loading. The removal torque values were measured after a fatigue test was conducted at 0 cycles (control), 50,000 cycles and 1,000,000 cycles. In the second experiment, 15 implants were divided into the same groups. Then, bending moments were investigated.
Results
The mean initial removal torque value was significantly higher than 50,000 cycles and 1,000,000 cycles (P < 0.001). The comparison of mean removal torque value between types of abutments was not significantly different (P > 0.05), and the bending moments of all abutments were not significantly different (P > 0.05).
Conclusions
From the boundary of this in-vitro study, it could be concluded that customized titanium abutment and hybrid abutment were not significantly different in terms of removal torque values after the fatigue test. The bending moment between types of abutment were not significantly different. Thus, it could be concluded that abutment type does not significantly influence abutment stability or fracture strength.
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