Comparison of Self-Drilling and Self-Tapping Cervical Spine Screws Using ASTM F543-07 PDF Download
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Author: Regina J. Konz Publisher: ISBN: Category : Axial pullout Languages : en Pages : 18
Book Description
ASTM F543-07 is used to evaluate insertion load (Annex A4), driving torque (A2), and axial pullout (A3) characteristics of self-tapping metallic medical bone screws. F543-07 was designed to evaluate screws that utilize a pre-drilled pilot hole and was not intended for self-drilling screws. The objectives of this study were to (1) adapt the F543-07 test methods to allow evaluation of both self-drilling and self-tapping screws and (2) quantify differences in performance between the two screw types. For all three tests (A4, A2, A3) appropriately sized pilot holes were pre-drilled into the surrogate test medium for all the self-tapping screw designs per ASTM F543-07. No pilot holes were created for the self-drilling screws. During the insertion load tests (A4), a constant rotation was applied to the screws under an initial, near-zero axial force state. While monitoring axial load, torque, and displacement, the axial load was gradually increased. The maximum load at which there was a marked increase in torque and displacement on the graph was indicative of the force required to engage the self-drilling or the self-tapping feature. To measure driving torque (A2), a constant rotation was applied. To maintain screw driver-screw contact, a constant-force axial pre-load was required. The axial insertion load, determined during the insertion load testing (A4), was used as the preload for the driving torque testing. Axial pullout testing (A3) measured the axial tensile force required to remove a screw from the test medium. Quantifiable differences in mean insertion load, driving torque, and pullout load were found, demonstrating that these methods are able to discern differences in performance between different screw designs. Finally, this study demonstrated it is possible to adapt the test methods outlined in ASTM F543-07 to evaluate the insertion load, driving torque, and axial pullout performance of self-drilling screws in addition to self-tapping screws.
Author: Regina J. Konz Publisher: ISBN: Category : Axial pullout Languages : en Pages : 18
Book Description
ASTM F543-07 is used to evaluate insertion load (Annex A4), driving torque (A2), and axial pullout (A3) characteristics of self-tapping metallic medical bone screws. F543-07 was designed to evaluate screws that utilize a pre-drilled pilot hole and was not intended for self-drilling screws. The objectives of this study were to (1) adapt the F543-07 test methods to allow evaluation of both self-drilling and self-tapping screws and (2) quantify differences in performance between the two screw types. For all three tests (A4, A2, A3) appropriately sized pilot holes were pre-drilled into the surrogate test medium for all the self-tapping screw designs per ASTM F543-07. No pilot holes were created for the self-drilling screws. During the insertion load tests (A4), a constant rotation was applied to the screws under an initial, near-zero axial force state. While monitoring axial load, torque, and displacement, the axial load was gradually increased. The maximum load at which there was a marked increase in torque and displacement on the graph was indicative of the force required to engage the self-drilling or the self-tapping feature. To measure driving torque (A2), a constant rotation was applied. To maintain screw driver-screw contact, a constant-force axial pre-load was required. The axial insertion load, determined during the insertion load testing (A4), was used as the preload for the driving torque testing. Axial pullout testing (A3) measured the axial tensile force required to remove a screw from the test medium. Quantifiable differences in mean insertion load, driving torque, and pullout load were found, demonstrating that these methods are able to discern differences in performance between different screw designs. Finally, this study demonstrated it is possible to adapt the test methods outlined in ASTM F543-07 to evaluate the insertion load, driving torque, and axial pullout performance of self-drilling screws in addition to self-tapping screws.
Author: Agust Gudmundsson Publisher: Cambridge University Press ISBN: 1139500694 Category : Science Languages : en Pages : 593
Book Description
Rock fractures control many of Earth's dynamic processes, including plate-boundary development, tectonic earthquakes, volcanic eruptions, and fluid transport in the crust. An understanding of rock fractures is also essential for effective exploitation of natural resources such as ground water, geothermal water, and petroleum. This book combines results from fracture mechanics, materials science, rock mechanics, structural geology, hydrogeology, and fluid mechanics to explore and explain fracture processes and fluid transport in the crust. Basic concepts are developed from first principles and illustrated with worked examples linking models of geological processes to real field observations and measurements. Many additional examples and exercises are provided online, allowing readers to practise formulating and quantitative testing of models. Rock Fractures in Geological Processes is designed for courses at the advanced undergraduate and graduate level but also forms a vital resource for researchers and industry professionals concerned with fractures and fluid transport in the Earth's crust.
Author: Gongtian Shen Publisher: ISBN: 9789811598388 Category : Acoustic emission Languages : en Pages :
Book Description
This book presents articles from the World Conference on Acoustic Emission 2019 (WCAE-2019) held at Guangdong, China. The latest research and applications of acoustic emission (AE) are explored, with a particular emphasis on detecting and processing AE signals, the development of AE instrument and testing standards, AE of materials, engineering structures and systems, including the processing of collected data and analytical techniques. Numerous case studies are also included. It brings together leading academicians and professionals in the field to foster collaboration and to enhance research in this important area, with wide ranging applications.
Author: Philip F. Stahel Publisher: Springer ISBN: 1447143698 Category : Medical Languages : en Pages : 503
Book Description
In general, surgeons strive to achieve excellent results and ideal patient outcomes, however, this noble task is frequently failed. For patients, surgical complications are analogous to “friendly fire” in wartime. Both scenarios imply that harm is unintentionally done by somebody whose aim was to help. Interestingly, adverse events resulting from surgical interventions are more frequently related to system errors and a communication breakdown among providers, rather than to the imminent threat of the surgical blade “gone wrong”. Patient Safety in Surgery aims to increase the safety and quality of care for patients undergoing surgical procedures in all fields of surgery. Patient Safety in Surgery, covers all aspects related to patient safety in surgery, including pertinent issues of interest to surgeons, medical trainees (students, residents, and fellows), nurses, anaesthesiologists, patients, patient families, advocacy groups, and medicolegal experts.
Author: Teyfik Demir Publisher: Springer ISBN: 3319166018 Category : Technology & Engineering Languages : en Pages : 88
Book Description
This brief book systematically discusses all subjects that affect the pullout strength of pedicle screws. These screws are used in spinal surgeries to stabilize the spine. The holding strength of the pedicle screw is vital since loosening of the pedicle screws can cause revision surgeries. Once the pedicle screw is pulled out, it is harder to obtain same stabilization for the fused vertebrae. The book reviews the effect of screw designs, application techniques, cement augmentation, coating of the screw and test conditions on the pullout strength. The studies with finite element analysis were also included.
Author: Genʼichi Taguchi Publisher: Wiley-Interscience ISBN: Category : Business & Economics Languages : en Pages : 1708
Book Description
In the last fifty years, one man stands out as the driving force behind the quality revolution--Genichi Taguchi. Now, for the first time in one volume, Taguchi's Quality Engineering Handbook presents all the methods and beliefs that have made Taguchi one of the most respected authorities on quality engineering and management in the world. No other single volume presents the full breadth of founding beliefs behind the successful engineering practices used by today's leading companies. (Midwest).
Author: Feza Korkusuz Publisher: Springer ISBN: 3319207776 Category : Medical Languages : en Pages : 773
Book Description
Strong roots in basic science and research enhance clinical practice. This book is a rich source of information for basic scientists and translational researchers who focus on musculoskeletal tissues and for orthopedic and trauma surgeons seeking relevant up-to-date information on molecular biology and the mechanics of musculoskeletal tissue repair and regeneration. The book opens by discussing biomaterials and biomechanics, with detailed attention to the biologic response to implants and biomaterials and to the surface modification of implants, an important emerging research field. Finite element analysis, mechanical testing standards and gait analysis are covered. All these chapters are strongly connected to clinical applications. After a section on imaging techniques, musculoskeletal tissues and their functions are addressed, the coverage including, for example, stem cells, molecules important for growth and repair, regeneration of cartilage, tendons, ligaments, and peripheral nerves, and the genetic basis of orthopedic diseases. State-of-the-art applications such as platellet rich plasma were included. Imaging is a daily practice of scientists and medical doctors. Recent advancements in ultrasonography, computerized tomography, magnetic resonance, bone mineral density measurements using dual energy X-ray absorptiometry, and scintigraphy was covered following conventional radiography basics. Further extensive sections are devoted to pathology, oncogenesis and tumors, and pharmacology. Structure is always related with function. Surgical anatomy was therefore covered extensively in the last section.
Author: Radovan Zdero Publisher: Academic Press ISBN: 0128038551 Category : Technology & Engineering Languages : en Pages : 430
Book Description
Experimental Methods in Orthopaedic Biomechanics is the first book in the field that focuses on the practicalities of performing a large variety of in-vitro laboratory experiments. Explanations are thorough, informative, and feature standard lab equipment to enable biomedical engineers to advance from a 'trial and error' approach to an efficient system recommended by experienced leaders. This is an ideal tool for biomedical engineers or biomechanics professors in their teaching, as well as for those studying and carrying out lab assignments and projects in the field. The experienced authors have established a standard that researchers can test against in order to explain the strengths and weaknesses of testing approaches. - Provides step-by-step guidance to help with in-vitro experiments in orthopaedic biomechanics - Presents a DIY manual that is fully equipped with illustrations, practical tips, quiz questions, and much more - Includes input from field experts who combine their real-world experience to provide invaluable insights for all those in the field
Author: Yohan Payan Publisher: Springer Science & Business Media ISBN: 3642290140 Category : Technology & Engineering Languages : en Pages : 392
Book Description
This volume focuses on the biomechanical modeling of biological tissues in the context of Computer Assisted Surgery (CAS). More specifically, deformable soft tissues are addressed since they are the subject of the most recent developments in this field. The pioneering works on this CAS topic date from the 1980's, with applications in orthopaedics and biomechanical models of bones. More recently, however, biomechanical models of soft tissues have been proposed since most of the human body is made of soft organs that can be deformed by the surgical gesture. Such models are much more complicated to handle since the tissues can be subject to large deformations (non-linear geometrical framework) as well as complex stress/strain relationships (non-linear mechanical framework). Part 1 of the volume presents biomechanical models that have been developed in a CAS context and used during surgery. This is particularly new since most of the soft tissues models already proposed concern Computer Assisted Planning, with a pre-operative use of the models. Then, the volume addresses the two key issues raised for an intra-operative use of soft tissues models, namely (Part 2) “how to estimate the in vivo mechanical behavior of the tissues?” (i.e. what are the values of the mechanical parameters that can deliver realistic patient-specific behavior?) and (Part 3) “how to build a modeling platform that provides generic real-time (or at least interactive-time) numerical simulations?”
Author: Stephen C. Cowin Publisher: CRC Press ISBN: Category : Medical Languages : en Pages : 328
Book Description
This informative volume summarizes what is known about bone mechanics. It describes the methods used to acquire that knowledge and suggests the nature of future research on this topic. This easy-to-read book keeps mathematical notation simple and minimal and presents data in summary form. Bone Mechanics is concerned with the mechanical behavior and functional stress adaptation of whole bones as structural elements, the mechanical behavior and functional adaptation of bone tissue as material, and the physiological significance of the mechanical properties of bone and the biological response of bone to applied stress. Orthopaedic surgeons, dentists, anatomists, biologists, biomedical engineers and physiologists are among those who will find this volume to be of interest.
Author: Regina J. Konz
Author: Regina J. Konz
Author: Agust Gudmundsson
Author: Gongtian Shen
Author: Philip F. Stahel
Author: Teyfik Demir
Author: Genʼichi Taguchi
Author: Feza Korkusuz
Author: Radovan Zdero
Author: Yohan Payan
Author: Stephen C. Cowin