Fatigue life and reliability evaluation for dental implants based on computer simulation and limited test data

Tsai, Yuo-Tern; Wang, Kuo‐Shong; Woo, Jeng-Chung

doi:10.1177/0954406212463532

Cited by 14 publications

(14 citation statements)

References 14 publications

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“…Static shear-compression testing was performed with axial load at a velocity of 1 mm/min until the failure of the implant systems, while deriving a force–displacement curve [44]. Failure in the static test was defined as having a fracture in any part among the implant systems or a sudden force drop observed through the force–displacement curve [45,46].…”

Section: Methodsmentioning

confidence: 99%

Optimized Dental Implant Fixture Design for the Desirable Stress Distribution in the Surrounding Bone Region: A Biomechanical Analysis

et al. 2019

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The initial stability of a dental implant is known to be an indicator of osseointegration at immediate loading upon insertion. Implant designs have a fundamental role in the initial stability. Although new designs with advanced surface technology have been suggested for the initial stability of implant systems, verification is not simple because of various assessment factors. Our study focused on comparing the initial stability between two different implant systems via design aspects. A simulated model corresponding to the first molar derived from the mandibular bone was constructed. Biomechanical characteristics between the two models were compared by finite element analysis (FEA). Mechanical testing was also performed to derive the maximum loads for the two implant systems. CMI IS-III active (IS-III) had a more desirable stress distribution than CMI IS-II active (IS-II) in the surrounding bone region. Moreover, IS-III decreased the stress transfer to the nerve under the axial loading direction more than IS-II. Changes of implant design did not affect the maximum load. Our analyses suggest that the optimized design (IS-III), which has a bigger bone volume without loss of initial fixation, may minimize the bone damage during fixture insertion and we expect greater effectiveness in older patients.

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Section: Methodsmentioning

confidence: 99%

Optimized Dental Implant Fixture Design for the Desirable Stress Distribution in the Surrounding Bone Region: A Biomechanical Analysis

et al. 2019

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“…(6)) by extracting a regression trend line from the experimental data (Tsai et al, 2012), where N f is the number of cycles and L is the level of cyclic load (N).…”

Section: Comparison Of the Experimental And Numerical Resultsmentioning

confidence: 99%

Fatigue properties of a dental implant produced by electron beam melting ® (EBM)

Jamshidinia

Wang

Tong

et al. 2015

Journal of Materials Processing Technology

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“…The compressive load was applied at 30 degrees from the implant axis, with magnitude of 100 N [20]. The fatigue tool was applied, based in Goodman relation theory [26][27][28], the fatigue simulation was performed considering the load repetition from 1 cycle per second (Figure 3). The constitutive law in this study followed the Robert Hooke principle for linear elastic materials.…”

Section: Methodsmentioning

confidence: 99%

Influence of Implant-Abutment Contact Surfaces and Prosthetic Screw Tightening on the Stress Concentration, Fatigue Life and Microgap Formation: A Finite Element Analysis

Tribst

Piva²,

Silva-Concílio

et al. 2021

Oral

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The purpose of this in silico study was to investigate the effect of abutment screw torque and implant-abutment contact surfaces on the stress generation, microgap formation and simulated fatigue life of an external hexagon connection under oblique loading. Three-dimensional numerical models of the external hexagon implant were modeled containing two different implant-abutment contact surfaces (with and without contacting the hexagon axial walls) as well as using screw torques of 20 Ncm or 30 Ncm. Following the ISO 14801, an oblique load of 100 N was applied to the prosthesis. The von Mises stress, microgap formation, safety factor and fatigue life were obtained. The stresses in the abutment screw and implant were minimally influenced by the screw torque. However, this minimal stress in the screw with a 30 Ncm torque reduced the calculated fatigue life in comparison with 20 Ncm when the external hexagon axial walls were not in contact at the implant-abutment interface. The safety factor for the implant was higher when using minimal surfaces at the abutment-interfaces; however, it compromised the screw safety factor increasing its failure probability. The higher the screw torque, the lower was the microgap formation at the implant-abutment interface. However, the calculated residual stress is proportional to the applied torque, reducing the fatigue life in the screw. This effect can be attenuated using an implant-abutment system with more contacting surfaces.

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Fatigue life and reliability evaluation for dental implants based on computer simulation and limited test data

Cited by 14 publications

References 14 publications

Optimized Dental Implant Fixture Design for the Desirable Stress Distribution in the Surrounding Bone Region: A Biomechanical Analysis

Optimized Dental Implant Fixture Design for the Desirable Stress Distribution in the Surrounding Bone Region: A Biomechanical Analysis

Fatigue properties of a dental implant produced by electron beam melting ® (EBM)

Influence of Implant-Abutment Contact Surfaces and Prosthetic Screw Tightening on the Stress Concentration, Fatigue Life and Microgap Formation: A Finite Element Analysis

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