A novel motorized bending apparatus for surgical plates

Park, Seungbin; Lee, Jeonghwan; Park, Si-Myung; Noh, Gunwoo; Lee, Jungwoo; Park, Min Soo; Kim, Young‐Jun

doi:10.1007/s12206-019-0716-0

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…This is because of the faults caused by the in‐plane defects, as well as the unevenly applied voltage due to the low conductivity of the electrode. [ 19 ] In this work, the in‐plane defects were covered by an extraordinarily thick PWA layer, and a high electrical conductivity was achieved using aluminum electrodes. Considering that aluminum foil can be crumpled and torn apart, we attempted to fabricate OLEDs that exhibit luminescence even in such deformed states.…”

Section: Resultsmentioning

confidence: 99%

Common Metals as Electrodes for Leak‐Free Organic Light‐Emitting Devices Using Extraordinary Thick Phosphotungstic Acid Buffer Layers

Oono

Miyakawa

Shimizu

et al. 2022

Advanced Optical Materials

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Electrical leakage is one of the fatal faults associated with thin‐film devices (TFDs) including organic light‐emitting devices (OLEDs). To prevent electrical leakage, highly smooth electrodes are required to avoid the concentration of the electric field at local points. However, this requires the use of expensive electrode substrates. Here, OLEDs using inexpensive, aluminum‐foil‐based electrode substrates with an extremely high surface roughness are fabricated. A low leakage current is realized by incorporating extraordinary thick buffer layers of phosphotungstic acid (PWA) exhibiting the negative differential resistance (NDR) property. In its pristine state, PWA exhibits a high electrical resistance. However, upon applying electric current, the resistance is significantly decreased, resulting in increased conductivity and expression of NDR property, owing to the formation of conductive filaments and charge‐storage effects. The OLEDs produced with PWA achieve a low‐driving voltage and high external quantum efficiency simultaneously. Aluminum‐foil‐based OLEDs with a light‐emission area of 64 cm2 are fabricated. They emit steady luminescence even in crumpled and torn states. To the best of authors’ knowledge, this is the first report of a large‐area OLED exhibiting steady luminescence in such deformed states.

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Section: Resultsmentioning

confidence: 99%

Common Metals as Electrodes for Leak‐Free Organic Light‐Emitting Devices Using Extraordinary Thick Phosphotungstic Acid Buffer Layers

Oono

Miyakawa

Shimizu

et al. 2022

Advanced Optical Materials

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Practical bending-angle calculation for an automated surgical plate bending apparatus

et al. 2020

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Design process of patient-specific osteosynthesis plates using topology optimization

Park

et al. 2021

Journal of Computational Design and Engineering

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To reduce complications related to the osteosynthesis plating system, the use of a patient-specific plate design was proposed. However, the issue of associated complications is still critical. Because existing patient-specific plate designs have mainly relied on parametric studies, a design method is needed that considers the complex factors influencing the performance of the reconstruction and that can be generalized for various patients. The goal of this study was to propose a design process that can strengthen the advantages of a customized plate to reduce patient discomfort and ensure the stability of surgery. We applied topology optimization to design a plate for a case of mandibular condyle fracture. The optimization problem was set to maximize the plate stiffness and minimize its volume. The performance of the designed plate was evaluated using finite element simulations, which approximated the various mastication states. Plate performance was then compared with the performance of two conventional plating systems: bent plates and computerized numerical control-machined plates. The conventional plate models used a pair of mini-plates, and the bent plate was modeled by conducting bending simulation. Each finite element model was appraised via masticatory simulations under static molar-jaw-closing conditions. Differences in stress concentration were noted between the model with bent plates and the model with computerized numerical control-machined plates. The most severe stress concentration occurred in the bent plate, which was affected by the residual stress from the bending process. In comparison with the two conventional plates, the newly designed plate exhibited significantly improved biomechanical stability in terms of stress and stiffness and had approximately twice the endurance capability against fractured bone separation. The newly designed plate was designed to have a balance between volume and plate stiffness, and it showed superior stability over the conventional plates. The proposed plate design process using topology optimization is an effective method not only because it enhances the advantages of the patient-specific plate but also because it can be applied in various reconstruction cases.

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A novel motorized bending apparatus for surgical plates

Cited by 3 publications

References 13 publications

Common Metals as Electrodes for Leak‐Free Organic Light‐Emitting Devices Using Extraordinary Thick Phosphotungstic Acid Buffer Layers

Common Metals as Electrodes for Leak‐Free Organic Light‐Emitting Devices Using Extraordinary Thick Phosphotungstic Acid Buffer Layers

Practical bending-angle calculation for an automated surgical plate bending apparatus

Design process of patient-specific osteosynthesis plates using topology optimization

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