Examination of the implant—abutment interface after fatigue testing

Cibirka, Roman M.; Nelson, Steven K.; Lang, Brien R.; Rueggeberg, Frederick A.

doi:10.1067/mpr.2001.114266

Cited by 162 publications

(170 citation statements)

References 20 publications

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“…A decrease in the detorque value has been reported when the implant system is in function over occlusal load (3,4) and this data should be expected in the present study. However, all the implant systems subjected to thermal cycling and mechanical fatigue showed higher detorque values when compared to the respect system with no thermal and mechanical testing.…”

Section: Discussionsupporting

confidence: 63%

“…The compressive load was applied on the abutments only along the vertical axis, possibly leading to a better screw thread adjustment. In studies that found lower detorque values, the resultant load vector was not only vertical, but some lateral force was also observed, which could contribute to a great preload loss (3)(4)(5). Among the evaluated systems, the Morse taper with universal post showed the lowest preload loss, and it was the only system that showed higher detorque than preload after thermal cycling and mechanical fatigue.…”

Section: Discussionmentioning

confidence: 98%

“…The assemblies were kept immersed in distilled water at 37°C. The unidirectional vertical load was applied on the abutment by a pneumatic piston calibrated between 100 and 120 N. A total of one million of loads was performed, which is equivalent to an in vivo one-year mastication period (4).…”

Section: Methodsmentioning

confidence: 99%

“…The preload loss during the occlusal load with the prosthesis in function favors the misfit of the implant-abutment connection and this can result in stress increase in the implant and connection components, and consequently in the surrounding bone (3)(4)(5). Moreover, the stress at connection components could cause screw fracture and loss, abutment and prosthesis damage, requiring the repair or replacement of the prosthesis and its components.…”

Section: Introductionmentioning

confidence: 99%

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Preload loss and bacterial penetration on different implant-abutment connection systems

et al. 2010

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Preload loss can favor the occurrence of implant-abutment interface misfit, and bacterial colonization at this interface may lead to implant failure. The aim of this study was to evaluate the preload loss and bacterial penetration through the implant-abutment interface of conical and external hexagon connection systems subjected to thermal cycling and mechanical fatigue (TM). Four different implant-abutment connection systems were evaluated (n=6): external hexagon with universal post, Morse taper with universal post, Morse taper with universal post through bolt, and locking taper with standard abutment. The assemblies (implant-abutment) were subjected to a thermal cycling regimen (1,000 cycles of 5°C and 55°C) and to mechanical fatigue (1.0 million cycles, 1.0 Hz, 120 N). The assemblies were immersed in Tryptic Soy + Yeast Extract broth containing Streptococcus sanguinis and incubated at 37°C and 10% CO 2 for 72 h. Detorque values were recorded. The bacterial penetration was assessed and the abutments were observed by scanning electron microscopy. The preload data were analyzed statistically by two-way ANOVA and Tukey's test at 5% significance level. All screw abutment systems showed significantly higher (p<0.05) detorque values when subjected to TM and all conical systems presented bacterial penetration. The results show no relationship between the preload loss and the bacterial penetration.

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Section: Discussionsupporting

confidence: 63%

Section: Discussionmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preload loss and bacterial penetration on different implant-abutment connection systems

et al. 2010

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“…Some studies evaluated the reverse torque and loosening of abutment retaining screw, (16,(18)(19)(20)(21), but none of these studies evaluated the loosening and reverse torque in platform switching connections and external hexagon implants. The results of the current study corroborate the findings in literature regarding reverse torque values found in implant/abutment connections with external hexagon after mechanical cycling test, as found by Cibirka et al (18), for RP and WP groups.…”

Section: Discussionmentioning

confidence: 99%

Effect of Mechanical Cycling on Screw Torque in External Hexagon Implants with and without Platform Switching

et al. 2015

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This in vitro study evaluated the effect of mechanical cycling on the torque of retaining screw in external hexagon implants with platform switching (PS), regular platform (RP) and wide platform (WP). A total of 30 specimens were equally divided into 3 groups: PS, PR and WP. Each specimen was prepared with implants: 3.75 x 10 mm for RP group and 5.0x10 mm for PS and WP groups and its respective abutment with 32 Ncm torque. All groups were subjected to 10 6 cycles with 100 N (corresponding to about 40 months of chewing). The results were obtained with the reverse torque of each specimen and data were evaluated using ANOVA and Tukey test (p<0.05). The PS group showed statistically significant difference in screw removal torque (30.06±5.42) compared with RP (23.75±2.76) and WP (21.32±3.53) (p<0.05) groups; the RP and WP groups showed no statistically significant difference between them. It was concluded that the PS group showed higher reverse torque value, suggesting lower susceptibility of the abutment screw loosening.

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Does the transversal screw design increase the risk of mechanical complications in dental implants? A finite elements analysis

Lasheras

Rodríguez

Mauvezín-Quevedo

et al. 2019

Numer Methods Biomed Eng

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The transversal screw was introduced in order to overcome some disadvantages of the transocclusal screw. However, its mechanical risk has not been studied sufficiently. The main purpose of this research was to assess and compare stress distribution in the screws and abutment of a single-crown implant with transversal and transocclusal screw models. Two 3D models were assembled to analyse a single-implant-supported prosthesis with transversal and transocclusal screws embedded in the jawbone. The crown was subjected to a static load of value 300 N with different levels of inclination. The transversal screw model, with an axial load of 15°, was the one with lowest stress values in all its components. However, the stress was greater with more inclined loads

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Examination of the implant—abutment interface after fatigue testing

Cited by 162 publications

References 20 publications

Preload loss and bacterial penetration on different implant-abutment connection systems

Preload loss and bacterial penetration on different implant-abutment connection systems

Effect of Mechanical Cycling on Screw Torque in External Hexagon Implants with and without Platform Switching

Does the transversal screw design increase the risk of mechanical complications in dental implants? A finite elements analysis

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