The Experts below are selected from a list of 3711 Experts worldwide ranked by ideXlab platform
Akçalı İ.d. - One of the best experts on this subject based on the ideXlab platform.
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An analytical method to create patient-specific deformed bone models using X-ray images and a healthy bone model
'Elsevier BV', 2019Co-Authors: Ün M.k., Avşar E., Akçalı İ.d.Abstract:PubMedID: 30423529Generation of patient-specific bone models from X-ray images is useful for various medical applications such as total Hip Replacement, Implant manufacturing, knee kinematic studies and deformity correction. These models may provide valuable information required for a more reliable operation. In this work, we propose a new algorithm for generating patient-specific 3D models of femur and tibia with deformity, using only a generic healthy bone model and some simple measurements taken on the X-ray images of the diseased bone. Using the X-ray measurements, an interpolation function (a polynomial or a cubic spline) is fit to the mid-diaphyseal curve of the actual bone and the generic bone model is deformed in the guidance of this function with free form deformation method. The created models are intended to be used mainly for the visualization of fixation procedure in software-supported external fixation systems. An error measure is defined to quantify the error in this matching procedure. The method is found to be capable of producing deformed tibia models that satisfactorily reflect the actual bones, as confirmed by two orthopaedic surgeons who use software-supported external fixation systems regularly. © 2018 Elsevier Ltd112M406This research is supported by the Turkish Research and Science Council (TÜBİTAK) under Grant No: 112M406
I. D. Akçali - One of the best experts on this subject based on the ideXlab platform.
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An analytical method to create patient-specific deformed bone models using X-ray images and a healthy bone model.
Computers in Biology and Medicine, 2019Co-Authors: Ercan Avşar, I. D. AkçaliAbstract:Abstract Generation of patient-specific bone models from X-ray images is useful for various medical applications such as total Hip Replacement, Implant manufacturing, knee kinematic studies and deformity correction. These models may provide valuable information required for a more reliable operation. In this work, we propose a new algorithm for generating patient-specific 3D models of femur and tibia with deformity, using only a generic healthy bone model and some simple measurements taken on the X-ray images of the diseased bone. Using the X-ray measurements, an interpolation function (a polynomial or a cubic spline) is fit to the mid-diaphyseal curve of the actual bone and the generic bone model is deformed in the guidance of this function with free form deformation method. The created models are intended to be used mainly for the visualization of fixation procedure in software-supported external fixation systems. An error measure is defined to quantify the error in this matching procedure. The method is found to be capable of producing deformed tibia models that satisfactorily reflect the actual bones, as confirmed by two orthopaedic surgeons who use software-supported external fixation systems regularly.
Scott W. Kidd - One of the best experts on this subject based on the ideXlab platform.
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Treatment Outcomes for Periprosthetic Femoral Fractures in Cementless Press-Fit Total Hip Replacement.
Veterinary and Comparative Orthopaedics and Traumatology, 2020Co-Authors: Isobel C. Monotti, Chris A. Preston, Scott W. KiddAbstract:Objective The aim of this study was to report outcomes in dogs with periprosthetic femoral fractures associated with a press-fit cementless femoral total Hip Replacement Implant. Methods Electronic medical records and digital radiographs were used to identify dogs with periprosthetic femoral fractures associated with press-fit cementless total Hip Replacement. Data collected included signalment, weight, time of fracture, cause of fracture, presence of intra-operative fissure, fracture type, repair technique, and clinical and radiographic outcomes. Long-term patient outcome was assessed by communication with owners or referring veterinarians. Results Twenty-eight dogs with femoral fracture repair associated with cementless press-fit total Hip Replacement were identified. Eight of the fractures occurred intraoperatively and 20 occurred at a median of 2 days postoperatively. An oblique or spiral configuration was noted in 19 cases and 15 occurred at the distal end of the femoral stem (type B), with thirteen type B1, one type B2 and one type B3 fractures. Fractures were repaired with non-locking (18/28) or locking-plate fixation (10/28). Cerclage wire was applied around the plate and proximal bone segment in 17/28 dogs. Major complications occurred in 7/28 cases (five deep infection, two mechanical failures). Bone healing was noted in 21/23 cases, for which follow-up radiographic interpretation was available. Return to function was complete in 17 cases, acceptable in 8 cases and unacceptable in 3 cases. Conclusions While cementless total Hip Replacement periprosthetic femoral fractures can be successfully repaired with lateral plate fixation, the risk of infection appears to be high.
Kidd S.w. - One of the best experts on this subject based on the ideXlab platform.
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Treatment outcomes for periprosthetic femoral fractures in cementless press-fit total Hip Replacement
'Schattauer GmbH', 2020Co-Authors: Monotti I.c., Preston C.a., Kidd S.w.Abstract:Objective The aim of this study was to report outcomes in dogs with periprosthetic femoral fractures associated with a press-fit cementless femoral total Hip Replacement Implant. Materials and Methods Electronic medical records and digital radiographs were used to identify dogs with periprosthetic femoral fractures associated with press-fit cementless total Hip Replacement. Data collected included signalment, weight, time of fracture, cause of fracture, presence of intra-operative fissure, fracture type, repair technique, and clinical and radiographic outcomes. Long-term patient outcome was assessed by communication with owners or referring veterinarians. Results Twenty-eight dogs with femoral fracture repair associated with cementless press-fit total Hip Replacement were identified. Eight of the fractures occurred intraoperatively and 20 occurred at a median of 2 days postoperatively. An oblique or spiral configuration was noted in 19 cases and 15 occurred at the distal end of the femoral stem (type B), with thirteen type B1, one type B2 and one type B3 fractures. Fractures were repaired with non-locking (18/28) or locking-plate fixation (10/28). Cerclage wire was applied around the plate and proximal bone segment in 17/28 dogs. Major complications occurred in 7/28 cases (five deep infection, two mechanical failures). Bone healing was noted in 21/23 cases, for which follow-up radiographic interpretation was available. Return to function was complete in 17 cases, acceptable in 8 cases and unacceptable in 3 cases. Conclusions While cementless total Hip Replacement periprosthetic femoral fractures can be successfully repaired with lateral plate fixation, the risk of infection appears to be high
Muhammad Ahmed Abdullah - One of the best experts on this subject based on the ideXlab platform.
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Topology Optimization of Acetabular Cup by Finite Element Simulation
International Journal of Engineering and Management Sciences, 2020Co-Authors: Muhammad Ahmed AbdullahAbstract:Hip Replacements typically consist of a four-part piece. Our research will focus primarily on the acetabular component. Several different types of materials can be used when creating a Hip Replacement Implant ranging from plastic to titanium. Different materials are used to accommodate for allergic reactions or circumventing potential health risks. Aside from the material, the size of the components plays a factor in terms of durability; a larger diameter head might avoid dislodgement though it could increase wear and tear on the stems through constant friction. A patient’s force applied to the Hip Replacement is usually measured through a number of physical assessments. Finite element analysis (FEA), a computer-based method of data observation, allows for us to accurately simulate Hip forces and their impact on the Hip Replacements. Through this, it becomes easier to predict and calculate the performance of specific designs. Generative systems can also be used to support performance analysis and optimization through assessing a multitude of cases, many of which apply in real-world scenarios. By applying both systems, we designed and modeled an acetabular cup that when measured decreased the mass from 129 grams initially down to 52 grams, a 60% decrease in total mass. Furthermore, the design we created lessened the trauma on the piece through distributing force across the entirety of the piece rather than specific segments only. This shows an increased durability and life expectancy when compared to usual acetabular cups.