Modal analysis for implant stability assessment: Sensitivity of this methodology for different implant designs

Zanetti, Elisabetta M.; Ciaramella, S; Calı̀, Michele; Pascoletti, Giulia; Martorelli, Massimo; Asero, Riccardo; Watts, David C.

doi:10.1016/j.dental.2018.05.016

Cited by 44 publications

(32 citation statements)

References 34 publications

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“…Stated otherwise, the only identifiable layer has to be relatively wide and the peri-implant bone significantly weak. Such an observation corresponds to that of Zanetti et al (Zanetti et al 2018) who studied different configurations of implant geometries and weakened layers. Here, one should keep in mind that the clinically relevant peri-implant layers are of the order of 200 m thick with a reduced stiffness of 80% that of mature bone tissue (Mathieu et al 2011b(Mathieu et al , 2012Vayron et al 2018c).…”

Section: Discussionsupporting

confidence: 84%

“…In that work, both the bone stiffness and density evolved concurrently. More recently, Zanetti et al (Zanetti et al 2018) investigated the influence of implant design on the changes of the resonance frequency of bone-implant system during osseointegration using modal analysis. Their thorough analysis of different implant shapes also considered variations of the peri-implant bone stiffness in order to mimic bone maturation.…”

Section: Introductionmentioning

confidence: 99%

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Resonant frequency analysis of dental implants

Rittel

Dorogoy

Haïat

et al. 2019

Medical Engineering & Physics

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Dental implant stability influences the decision on the determination of the duration between implant insertion and loading, This work investigates the resonant frequency analysis by means of a numerical model. The investigation is done numerically through the determination of the eigenfrequencies and performing a steady state response analyses using a commercial finite element package. A peri-implant interface, of simultaneously varying stiffness (density) and layer thickness is introduced in the numerical 3D model in order to probe the sensitivity of the eigenfrequencies and steady state response to an evolving weakened layer, in an attempt to identify the bone reconstruction around the implant. For the first two modes, the resonant frequency is somewhat insensitive to the healing process, unless the weakened layer is rather large and compliant, like in the very early stages of the implantation. A "Normalized Healing Factor" is devised in the spirit of the Implant Stability Quotient, which can identify the healing process especially at the early stages after implantation. The sensitivity of the RFA to changes of mechanical properties of periprosthetic bone tissue seems relatively weak. Another indicator considering the amplitude as well as the resonance frequency might be more adapted to bone healing estimations. However, these results need to be verified experimentally as well as clinically.

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Section: Discussionsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Resonant frequency analysis of dental implants

Rittel

Dorogoy

Haïat

et al. 2019

Medical Engineering & Physics

View full text Add to dashboard Cite

show abstract

“…Vibration tests are based on the assumption that the resonance frequency is directly related to the stiffness of the bone–implant interface, and of the surrounding bone: they act like two springs in series, therefore the softer one plays the greatest influence [ 33 ]. As a general rule, high values of resonance frequency are produced by successfully integrated implants, while low values may be signs of ongoing mobilization and/or marginal bone loss.…”

Section: Methodsmentioning

confidence: 99%

Clinical Assessment of Dental Implant Stability During Follow-Up: What Is Actually Measured, and Perspectives

et al. 2018

Self Cite

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The optimization of loading protocols following dental implant insertion requires setting up patient-specific protocols, customized according to the actual implant osseointegration, measured through quantitative, objective methods. Various devices for the assessment of implant stability as an indirect measure of implant osseointegration have been developed. They are analyzed here, introducing the respective physical models, outlining major advantages and critical aspects, and reporting their clinical performance. A careful discussion of underlying hypotheses is finally reported, as is a suggestion for further development of instrumentation and signal analysis.

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“…Wearable devices can be used to manage systems too, like sensors used to control orthoses, prostheses [16,17] and tele rehabilitation robots, but different technologies are required. The system needs information to properly control the subsequent action and the sensor decision strategy can be different.…”

Section: Wearable Sensors For Monitoring Vs Wearable Sensors For Feedmentioning

confidence: 99%

Comprehensive Review on Current and Future Regulatory Requirements on Wearable Sensors in Preclinical and Clinical Testing

Ravizza¹,

Pietro²,

Sternini³

et al. 2019

Preprint

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Background: medical devices are designed, tested and placed on the market in a highly regulated environment. Wearable sensors are crucial components of various medical devices: design and validation of wearable sensors, if managed according to international standards, can foster innovation while respecting regulatory requirements. Material and methods: the purpose of this paper is to take into consideration the upcoming EU Medical Device Regulation 2017/245 and the current and future IEC and ISO standards that set methods for design and validation of medical devices, with a focus on wearable sensors. Risk classification according to the regulation is described. The international standards IEC 62304, IEC 60601, ISO 14971 and ISO 13485 are reviewed to define regulatory restrictions during design, pre-clinical validation and clinical validation of devices that include wearable sensors as crucial components. Results: current and future regulatory restrictions are described, and an integrated method for design planning, validation and clinical testing is described Discussion: application of this method to design wearable sensors should be evaluated in the future in order to assess its potentially positive impact to fostering innovation and to the time-to-market of the device.

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Modal analysis for implant stability assessment: Sensitivity of this methodology for different implant designs

Cited by 44 publications

References 34 publications

Resonant frequency analysis of dental implants

Resonant frequency analysis of dental implants

Clinical Assessment of Dental Implant Stability During Follow-Up: What Is Actually Measured, and Perspectives

Comprehensive Review on Current and Future Regulatory Requirements on Wearable Sensors in Preclinical and Clinical Testing

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