On the mechanical integrity of retrieved dental implants

Shemtov‐Yona, Keren; Rittel, D.

doi:10.1016/j.jmbbm.2015.05.014

Cited by 53 publications

(36 citation statements)

References 22 publications

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“…This can identify a correlation between the composition, dimensions, surface treatments, and risk factors in the future diagnosis of the disease [13]. …”

Section: Discussionmentioning

confidence: 99%

Biofilm Analysis of Retrieved Dental Implants after Different Peri-Implantitis Treatments

Geremias

Montero

Magini

et al. 2017

Case Reports in Dentistry

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The aim of the current study was to analyse the planktonic growth of Streptococcus mutans on the surfaces of three implants retrieved after three different peri-implantitis treatments. Three implants from a male patient with high levels of bone loss were treated by mechanical debridement, chemical decontamination, and implantoplasty. After 4 months of follow-up, the implants were removed. The growth and biofilm formation were measured by spectrophotometry (OD630 nm) and scanning electron microscopy (SEM), after 48 hours of incubation. Results showed an average of Streptococcus mutans planktonic growth over the implants of 0.21 nm (mechanical debridement), 0.16 nm (chemical decontamination), and 0.15 nm (implantoplasty). Data were analysed by ANOVA and Tukey's test (p < 0.05 for chemical decontamination and implantoplasty). Implantoplasty and chemical decontamination showed the lowest levels of planktonic growth, indicating a possible influence of the modification procedures on the titanium surface on the initial biofilm attachment.

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“…This can identify a correlation between the composition, dimensions, surface treatments, and risk factors in the future diagnosis of the disease [13]. …”

Section: Discussionmentioning

confidence: 99%

Biofilm Analysis of Retrieved Dental Implants after Different Peri-Implantitis Treatments

Geremias

Montero

Magini

et al. 2017

Case Reports in Dentistry

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“…This situation highlights the importance of studies focused on predicting implant life and on the possible causes of failure . These were the objectives of this study and other works …”

Section: Discussionmentioning

confidence: 99%

“…Fractographic analysis showed that implants may fracture after a relatively small number of cycles when subjected to forces of the kind that matches the load levels generated during mastication. The fracture mechanisms of Ti G5 and Ti G4 implants in an oral environment were identical to those found on specimens fractured in laboratory conditions …”

Section: Introductionmentioning

confidence: 99%

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Comparative study of compressive and fatigue strength of dental implants made of nanocrystalline Ti Hard and microcrystalline Ti G4

Elias

Fernandes

Biasi

2016

Fatigue Fract Eng Mat Struct

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Over the last decades, much research has been done to improve the surface quality of dental implants, but there was no change in the materials used to manufacture the implants. The purpose of the present work is to compare the compressive strength and fatigue failure of dental implants made with a new material, nanocrystalline Ti grade 4 fabricated by Equal Channel Angular Pressing (ECAP) (Ti Hard) with a traditional material, microcrystalline Ti grade 4 (Ti G4). Machined screw‐shaped implants with three different designs (Easy, Torq and Flash) made with the two materials were subjected to static and dynamic compressive loads. Implants made with Ti Hard showed higher static compressive strength (Easy: 889.9 ± 79.4 N, Flash: 588.9 ± 74.7 N, Torq: 498.3 ± 54.6 N) than implants made with TiG4 (Easy: 776.4 ± 74.5 N, Flash: 308.8 ± 15.2 N, Torq: 410.3 ± 25.2 N) and higher fatigue strength for 5 106 cycles (Easy: 400 N, Flash: 280 N, Torq: 260 N) than implants made with TiG4 (Easy: 300 N, Flash: 200 N, Torq: 200 N). The higher fatigue strength of nanocrystalline Ti G4 is attributed to a delay in crack initiation.

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“…The SEM images of the ST control specimens ( Figure 1A) and TiUn ( Figure 1B) showed a homogenous titanium surface with some irregular striations as a result of the industrial machining process. Any lengths of crack formation seen amongst the implants between 25 µm and 100 µm were characterised as "crack-like defects" [24]. Out of the implants selected, 43% contained observed defects on examined implants.…”

Section: Sem/edx Interfacial Analysismentioning

confidence: 99%

Mechanical and Spectroscopic Analysis of Retrieved/Failed Dental Implants

Daood

Banday²,

Akram

et al. 2017

Coatings

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Abstract:The purpose of this study was to examine surface alterations and bone formation on the surface of failed dental implants (Straumann [ST] and TiUnite [TiUn]) removed due to any biological reason. In addition, failure analysis was performed to test mechanical properties. Dental implants (n = 38) from two manufacturers were collected and subjected to chemical cleaning. The presence of newly formed hydroxyapatite bone around failed implants was evaluated using micro-Raman spectroscopy. Scanning electron microscopy was used to identify surface defects. Mechanical testing was performed using a Minneapolis servo-hydraulic system (MTS) along with indentation using a universal testing machine and average values were recorded. A statistical analysis of mechanical properties was done using an unpaired t test, and correlation between observed defects was evaluated using Chi-square (p = 0.05). Apatite-formation was evident in both implants, but was found qualitatively more in the ST group. No significant difference was found in indentation between the two groups (p > 0.05). The percentage of "no defects" was significantly lower in the ST group (71%). Crack-like and full-crack defects were observed in 49% and 39% of TiUn. The ST group showed 11,061 cycles to failure as compared with 10,021 cycles in the TiUnite group. Implant failure mechanisms are complex with a combination of mechanical and biological reasons and these factors are variable with different implant systems.

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On the mechanical integrity of retrieved dental implants

Cited by 53 publications

References 22 publications

Biofilm Analysis of Retrieved Dental Implants after Different Peri-Implantitis Treatments

Biofilm Analysis of Retrieved Dental Implants after Different Peri-Implantitis Treatments

Comparative study of compressive and fatigue strength of dental implants made of nanocrystalline Ti Hard and microcrystalline Ti G4

Mechanical and Spectroscopic Analysis of Retrieved/Failed Dental Implants

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