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    Wyświetlanie 1-4 z 4
    Tytuł:
    Inferring material properties in robotic bone drilling processes
    Autorzy:
    Gil, Jorge Juan
    Díaz, Iñaki
    Accini, Fernando
    Powiązania:
    https://bibliotekanauki.pl/articles/307362.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    właściwości materiałów
    chirurgia ortopedyczna
    operacja
    method to infer material properties
    bone drilling
    assisted surgery
    Opis:
    Recent innovations in robotics have enabled the development of automatic bone drilling tools which allows surgeons to improve the precision of their surgical operations. However, these tools still lack valuable tactile information about the material properties of the bone, preventing surgeons from making decisions while operating. The aim of this work is to explore whether robotic drilling tools can infer bone condition on the basis of certain key measures, particularly thrust force. Methods: To infer material properties in robotic bone drilling processes 1) a complete database of experimental operations with an automatic bone drilling tool is implemented and 2) binary logistic regression models are developed to estimate the type of material from the observed values (mainly the central tendency of the thrust force). This work compares three different materials: bovine bone specimens, porcine bone specimens and FullCure 720, which is a general-purpose resin with, a priori, much less feed resistance. The DRIBON automatic bone drilling tool developed at CEIT is used for the experiments. Results: The classification matrices derived using the logistic models show that it is possible to recognize a bovine bone vs. a porcine bone with a relatively high success rate rate (approximately 90%). In contrast, it is possible to recognize bone material vs. another material (in our case a resin) with a 100% of success. These results are successfully implemented in a new hand-held version of DRIBON. Conclusions: We propose a method and devise a novel hand-held tool which show that robotic systems can effectively infer bone material properties.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2019, 21, 3; 109-118
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling and optimization of temperature in orthopaedic drilling : An in vitro study
    Autorzy:
    Pandey, R. K.
    Panda, S. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/307028.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    analysis of variance
    ANOVA
    orthopaedic surgery
    response surface methodology
    Taguchi method
    thermal osteonecrosis
    analiza wariancji
    chirurgia ortopedyczna
    metoda Taguchi
    Opis:
    This present investigation uses the Taguchi and response surface methodology (RSM) for modelling and optimization of the temperature produced during bone drilling. The drilling of bone is a common procedure in orthopaedic surgery to produce hole for screw insertion to fixate the fracture devices and implants. A major problem which is encountered during such a procedure is the increase in temperature of the bone due to the plastic deformation of chips and the friction between the bone and the drill. The increase in temperature can result in thermal osteonecrosis which may delay healing or reduce the stability and strength of the fixation. The drilling experiments are conducted on poly-methyl-meth-acrylate (PMMA) (as a substitute for bone) using Taguchi’s L27 experimental design technique. The cutting parameters used are drill diameter, feed rate and cutting speed. The optimum cutting parameters for minimum temperature are determined by using S/N ratios and the effect of individual cutting parameters on temperature produced is evaluated using analysis of variance (ANOVA). A second-order model is established between the drilling parameters and temperature using RSM. The experimental results show that the drill diameter is the most significant drilling parameter affecting the temperature during drilling followed by cutting speed and feed, respectively. The values predicted and the values obtained from experiment are fairly close, which indicates that the developed RSM model can be effectively used to predict the temperature in orthopaedic drilling.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2014, 16, 1; 107-116
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Drilling resistance : A method to investigate bone quality
    Autorzy:
    Lughmani, W. A.
    Farukh, F.
    Bouazza-Marouf, K.
    Ali, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/306405.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    chirurgia ortopedyczna
    wiercenie
    gęstość mineralna kości
    jakość kości
    bone drilling
    orthopaedic surgery
    screw pull-out strength
    bone mineral density
    bone quality
    Opis:
    Purpose: Bone drilling is a major part of orthopaedic surgery performed during the internal fixation of fractured bones. At present, information related to drilling force, drilling torque, rate of drill-bit penetration and drill-bit rotational speed is not available to orthopaedic surgeons, clinicians and researchers as bone drilling is performed manually. Methods: This study demonstrates that bone drilling force data if recorded in-vivo, during the repair of bone fractures, can provide information about the quality of the bone. To understand the variability and anisotropic behaviour of cortical bone tissue, specimens cut from three anatomic positions of pig and bovine were investigated at the same drilling speed and feed rate. Results: The experimental results showed that the drilling force does not only vary from one animal bone to another, but also vary within the same bone due to its changing microstructure. Drilling force does not give a direct indication of bone quality; therefore it has been correlated with screw pull-out force to provide a realistic estimation of the bone quality. A significantly high value of correlation (r 2 = 0.93 for pig bones and r 2 = 0.88 for bovine bones) between maximum drilling force and normalised screw pull-out strength was found. Conclusions: The results show that drilling data can be used to indicate bone quality during orthopaedic surgery.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2017, 19, 1; 55-62
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anterior approach for determination of sagittal spinopelvic parameters using anterior pelvic plane and sternum plane: a case study on symptom-free subjects
    Autorzy:
    Radło, Paweł
    Danioł, Mateusz
    Boehler, Lukas
    Kozak, Josef
    Powiązania:
    https://bibliotekanauki.pl/articles/2063918.pdf
    Data publikacji:
    2020
    Wydawca:
    Międzynarodowe Stowarzyszenie na rzecz Robotyki Medycznej
    Tematy:
    USG nawigowane inteligentnie
    przodopochylenie miednicy
    staw biodrowy
    zakres ruchu
    chirurgia ortopedyczna wspomagana komputerowo
    chirurgia robotyczna wspomagana komputerowo
    smart navigated ultrasound
    pelvic tilt in the anterior pelvic plane
    hip-spine syndrome
    range of motion
    computer assisted orthopedic surgery
    computer assisted robotic surgery
    Opis:
    Sagittal imbalance causes low back pain, hip impingement, and influences the whole skeleton and muscular system of our body. It is documented in the literature on spinal deformities that good long-term surgical results can only be achieved by restoring sagittal balance and spinopelvic harmony as part of surgical treatment. Currently, the state of the art in sagittal balance determination is based on conventional radiology or an EOS system both using X-ray radiation. These procedures are associated with radiation exposure for the patients. Therefore, a new anterior approach is shown in this work to measure sagittal balance with a navigated ultrasound system without any radiation exposure. The anterior pelvic plane and a newly defined sternum plane are considered to provide an assessment of the sagittal balance. This new approach was tested in a trial on 10 symptom-free subjects by using a smartphone navigated ultrasound system. The relationship between the rotation of the pelvis and the upper body inclination in young healthy people is examined in a standing position. The study with new determined landmarks (incisura jugularis, superior iliac spinas, and symphysis pubis) gives us significant different results between male and female test persons. A proposal for a classification of sagittal balance is achieved which defines a reasonable range for the Sternum Tilt of -0.1 ± 1.5° / 3.7 ± 2.5°. The significant advantage of this method is to evaluate the sagittal balance with a cost effective, smart system without any radiation exposure to the patient.
    Źródło:
    Medical Robotics Reports; 2020, 8/9; 20-26
    2299-7407
    Pojawia się w:
    Medical Robotics Reports
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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