A novel micromotion measurement method to gain instructive insight into the acetabular bone-implant interface

Heilemann, Martin; Wendler, T; Münst, P.; Schleifenbaum, Stefan; Scholz, R.; Voigt, Christian

doi:10.1016/j.medengphy.2020.11.002

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…Micromotions at the bone-implant interface can be determined only indirectly, through extrapolation. In biomechanics, sophisticated methods exist that allow the measurement of deflections and displacements directly at the bone-implant interface via special optical markers, such as the pin-sleeve technique [ 35 ]. However, these methods are invasive and unsuitable for dental implants due to their small dimensions.…”

Section: Discussionmentioning

confidence: 99%

Novel approach to assessing the primary stability of dental implants under functional cyclic loading in vitro: a biomechanical pilot study using synthetic bone

Fischer,

Schleifenbaum,

Gelberg

et al. 2024

J Periodontal Implant Sci

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Purpose This pilot study was conducted to develop a novel test setup for the in vitro assessment of the primary stability of dental implants. This was achieved by characterising their long-term behaviour based on the continuous recording of micromotions resulting from dynamic and cyclic loading. Methods Twenty screw implants, each 11 mm in length and either 3.8 mm (for premolars) or 4.3 mm (for molars) in diameter, were inserted into the posterior region of 5 synthetic mandibular models. Physiological masticatory loads were simulated by superimposing cyclic buccal-lingual movement of the mandible with a vertically applied masticatory force. Using an optical 3-dimensional (3D) measuring system, the micromotions of the dental crowns relative to the alveolar bone resulting from alternating off-centre loads were concurrently determined over 10,000 test cycles. Results The buccal-lingual deflections of the dental crowns significantly increased from cycle 10 to cycle 10,000 ( P <0.05). The deflections increased sharply during the first 500 cycles before approaching a plateau. Premolars exhibited greater maximum deflections than molars. The bone regions located mesially and distally adjacent to the loaded implants demonstrated deflections that occurred synchronously and in the same direction as the applied loads. The overall spatial movement of the implants over time followed an hourglass-shaped loosening pattern with a characteristic pivot point 5.5±1.1 mm from the apical end. Conclusions In synthetic mandibular models, the cyclic reciprocal loading of dental implants with an average masticatory force produces significant loosening. The evasive movements observed in the alveolar bone suggest that its anatomy and yielding could significantly influence the force distribution and, consequently, the mechanical behaviour of dental implants. The 3D visualisation of the overall implant movement under functional cyclic loading complements known methods and can contribute to the development of implant designs and surgical techniques by providing a more profound understanding of dynamic bone-implant interactions.

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Section: Discussionmentioning

confidence: 99%

Novel approach to assessing the primary stability of dental implants under functional cyclic loading in vitro: a biomechanical pilot study using synthetic bone

Fischer,

Schleifenbaum,

Gelberg

et al. 2024

J Periodontal Implant Sci

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“…In addition to measuring temperature, force, and pressure, implantable sensors play an important role in monitoring the stability of implants by detecting any signs of loosening ( Ruther et al, 2011 ). Heilemann et al (2020) developed a pin-socket sensor system capable of monitoring micro-movements within a range of 59 ± 2 μm to 222 ± 5 μm on the implant surface. However, the drawback of this approach is that many holes need to be drilled in the implant surface to mount the sensor, which may cause structural damage to the implant.…”

Section: Implantable Sensors For the Musculoskeletal Systemmentioning

confidence: 99%

The application of impantable sensors in the musculoskeletal system: a review

Wang,

Chu,

Song

et al. 2024

Front. Bioeng. Biotechnol.

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As the population ages and the incidence of traumatic events rises, there is a growing trend toward the implantation of devices to replace damaged or degenerated tissues in the body. In orthopedic applications, some implants are equipped with sensors to measure internal data and monitor the status of the implant. In recent years, several multi-functional implants have been developed that the clinician can externally control using a smart device. Experts anticipate that these versatile implants could pave the way for the next-generation of technological advancements. This paper provides an introduction to implantable sensors and is structured into three parts. The first section categorizes existing implantable sensors based on their working principles and provides detailed illustrations with examples. The second section introduces the most common materials used in implantable sensors, divided into rigid and flexible materials according to their properties. The third section is the focal point of this article, with implantable orthopedic sensors being classified as joint, spine, or fracture, based on different practical scenarios. The aim of this review is to introduce various implantable orthopedic sensors, compare their different characteristics, and outline the future direction of their development and application.

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Dynamic biomechanical investigation of a novel sulcus bicipitalis plate in combination with a conventional locking plate for the treatment of complex proximal humerus fractures

Wendler

Fischer

Schleifenbaum

et al. 2023

Clinical Biomechanics

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A novel micromotion measurement method to gain instructive insight into the acetabular bone-implant interface

Cited by 4 publications

References 14 publications

Novel approach to assessing the primary stability of dental implants under functional cyclic loading in vitro: a biomechanical pilot study using synthetic bone

Novel approach to assessing the primary stability of dental implants under functional cyclic loading in vitro: a biomechanical pilot study using synthetic bone

The application of impantable sensors in the musculoskeletal system: a review

Dynamic biomechanical investigation of a novel sulcus bicipitalis plate in combination with a conventional locking plate for the treatment of complex proximal humerus fractures

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