The Experts below are selected from a list of 222 Experts worldwide ranked by ideXlab platform
M. Yatsunami - One of the best experts on this subject based on the ideXlab platform.
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Curved periacetabular osteotomy for the dysplastic hip: cadaveric and radiological analyses of safe procedures
Journal of Orthopaedics and Traumatology, 2003Co-Authors: K. Shiramizu, M. Naito, I. Asayama, M. YatsunamiAbstract:Curved periacetabular osteotomy is a modified Ganz’s procedure and requires an intrapelvic osteotomy. In order to establish the osteotomy line and the chisel inserting angles during the procedure, 32 cadavers and 28 three-dimensional computed tomographs were utilized. The guide-points for the osteotomy line were obtained from the cadaveric analysis and the inserting angles of the chisel were measured from the radiological analysis. On the supra-acetabular portion, the C-shaped osteotomy line, starting from the proximal end of the anteroinferior iliac spine, should pass above the intersection point of the arcuate line and the line passing from the proximal end of the anteroinferior iliac spine to that of the ischial spine, and the chisel inserting angle should be 17° to the anterior surface of the ilium. On the quadrilateral surface, the C-shaped line should locate one finger width anterior to the greater sciatic notch, and the chisel inserting angle should be 25° to the quadrilateral surface. On the anterior aspect of the ischium, the chisel should advance with an inserting angle of 60° to the ground at the level of one finger width below the distal Joint Edge.
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Curved periacetabular osteotomy for the dysplastic hip: cadaveric and radiological analyses of safe procedures
Journal of Orthopaedics and Traumatology, 2003Co-Authors: K. Shiramizu, M. Naito, I. Asayama, M. YatsunamiAbstract:Curved periacetabular osteotomy is a modified Ganz's procedure and requires an intrapelvic osteotomy. In order to establish the osteotomy line and the chisel inserting angles during the procedure, 32 cadavers and 28 three-dimensional computed tomographs were utilized. The guidepoints for the osteotomy line were obtained from the cadaveric analysis and the inserting angles of the chisel were measured from the radiological analysis. On the supra-acetabular portion, the C-shaped osteotomy line, starting from the proximal end of the anteroinferior iliac spine, should pass above the intersection point of the arcuate line and the line passing from the proximal end of the anteroinferior iliac spine to that of the ischial spine, and the chisel inserting angle should be 17° to the anterior surface of the ilium. On the quadrilateral surface, the C-shaped line should locate one finger width anterior to the greater sciatic notch, and the chisel inserting angle should be 25° to the quadrilateral surface. On the anterior aspect of the ischium, the chisel should advance with an inserting angle of 60° to the ground at the level of one finger width below the distal Joint Edge.
K. Shiramizu - One of the best experts on this subject based on the ideXlab platform.
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Curved periacetabular osteotomy for the dysplastic hip: cadaveric and radiological analyses of safe procedures
Journal of Orthopaedics and Traumatology, 2003Co-Authors: K. Shiramizu, M. Naito, I. Asayama, M. YatsunamiAbstract:Curved periacetabular osteotomy is a modified Ganz’s procedure and requires an intrapelvic osteotomy. In order to establish the osteotomy line and the chisel inserting angles during the procedure, 32 cadavers and 28 three-dimensional computed tomographs were utilized. The guide-points for the osteotomy line were obtained from the cadaveric analysis and the inserting angles of the chisel were measured from the radiological analysis. On the supra-acetabular portion, the C-shaped osteotomy line, starting from the proximal end of the anteroinferior iliac spine, should pass above the intersection point of the arcuate line and the line passing from the proximal end of the anteroinferior iliac spine to that of the ischial spine, and the chisel inserting angle should be 17° to the anterior surface of the ilium. On the quadrilateral surface, the C-shaped line should locate one finger width anterior to the greater sciatic notch, and the chisel inserting angle should be 25° to the quadrilateral surface. On the anterior aspect of the ischium, the chisel should advance with an inserting angle of 60° to the ground at the level of one finger width below the distal Joint Edge.
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Curved periacetabular osteotomy for the dysplastic hip: cadaveric and radiological analyses of safe procedures
Journal of Orthopaedics and Traumatology, 2003Co-Authors: K. Shiramizu, M. Naito, I. Asayama, M. YatsunamiAbstract:Curved periacetabular osteotomy is a modified Ganz's procedure and requires an intrapelvic osteotomy. In order to establish the osteotomy line and the chisel inserting angles during the procedure, 32 cadavers and 28 three-dimensional computed tomographs were utilized. The guidepoints for the osteotomy line were obtained from the cadaveric analysis and the inserting angles of the chisel were measured from the radiological analysis. On the supra-acetabular portion, the C-shaped osteotomy line, starting from the proximal end of the anteroinferior iliac spine, should pass above the intersection point of the arcuate line and the line passing from the proximal end of the anteroinferior iliac spine to that of the ischial spine, and the chisel inserting angle should be 17° to the anterior surface of the ilium. On the quadrilateral surface, the C-shaped line should locate one finger width anterior to the greater sciatic notch, and the chisel inserting angle should be 25° to the quadrilateral surface. On the anterior aspect of the ischium, the chisel should advance with an inserting angle of 60° to the ground at the level of one finger width below the distal Joint Edge.
Carte T Utts - One of the best experts on this subject based on the ideXlab platform.
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logistic network regression for scalable analysis of networks with Joint Edge vertex dynamics
Sociological Methodology, 2014Co-Authors: Zack W Almquis, Carte T UttsAbstract:Change in group size and composition has long been an important area of research in the social sciences. Similarly, interest in interaction dynamics has a long history in sociology and social psychology. However, the effects of endogenous group change on interaction dynamics are a surprisingly understudied area. One way to explore these relationships is through social network models. Network dynamics may be viewed as a process of change in the Edge structure of a network, in the vertex set on which Edges are defined, or in both simultaneously. Although early studies of such processes were primarily descriptive, recent work on this topic has increasingly turned to formal statistical models. Although showing great promise, many of these modern dynamic models are computationally intensive and scale very poorly in the size of the network under study and/or the number of time points considered. Likewise, currently used models focus on Edge dynamics, with little support for endogenously changing vertex sets. Here, the authors show how an existing approach based on logistic network regression can be extended to serve as a highly scalable framework for modeling large networks with dynamic vertex sets. The authors place this approach within a general dynamic exponential family (exponential-family random graph modeling) context, clarifying the assumptions underlying the framework (and providing a clear path for extensions), and they show how model assessment methods for cross-sectional networks can be extended to the dynamic case. Finally, the authors illustrate this approach on a classic data set involving interactions among windsurfers on a California beach.
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logistic network regression for scalable analysis of networks with Joint Edge vertex dynamics
arXiv: Methodology, 2011Co-Authors: Zack W Almquis, Carte T UttsAbstract:Network dynamics may be viewed as a process of change in the Edge structure of a network, in the vertex set on which Edges are defined, or in both simultaneously. Though early studies of such processes were primarily descriptive, recent work on this topic has increasingly turned to formal statistical models. While showing great promise, many of these modern dynamic models are computationally intensive and scale very poorly in the size of the network under study and/or the number of time points considered. Likewise, currently employed models focus on Edge dynamics, with little support for endogenously changing vertex sets. Here, we show how an existing approach based on logistic network regression can be extended to serve as highly scalable framework for modeling large networks with dynamic vertex sets. We place this approach within a general dynamic exponential family (ERGM) context, clarifying the assumptions underlying the framework (and providing a clear path for extensions), and show how model assessment methods for cross-sectional networks can be extended to the dynamic case. Finally, we illustrate this approach on a classic data set involving interactions among windsurfers on a California beach.
I. Asayama - One of the best experts on this subject based on the ideXlab platform.
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Curved periacetabular osteotomy for the dysplastic hip: cadaveric and radiological analyses of safe procedures
Journal of Orthopaedics and Traumatology, 2003Co-Authors: K. Shiramizu, M. Naito, I. Asayama, M. YatsunamiAbstract:Curved periacetabular osteotomy is a modified Ganz’s procedure and requires an intrapelvic osteotomy. In order to establish the osteotomy line and the chisel inserting angles during the procedure, 32 cadavers and 28 three-dimensional computed tomographs were utilized. The guide-points for the osteotomy line were obtained from the cadaveric analysis and the inserting angles of the chisel were measured from the radiological analysis. On the supra-acetabular portion, the C-shaped osteotomy line, starting from the proximal end of the anteroinferior iliac spine, should pass above the intersection point of the arcuate line and the line passing from the proximal end of the anteroinferior iliac spine to that of the ischial spine, and the chisel inserting angle should be 17° to the anterior surface of the ilium. On the quadrilateral surface, the C-shaped line should locate one finger width anterior to the greater sciatic notch, and the chisel inserting angle should be 25° to the quadrilateral surface. On the anterior aspect of the ischium, the chisel should advance with an inserting angle of 60° to the ground at the level of one finger width below the distal Joint Edge.
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Curved periacetabular osteotomy for the dysplastic hip: cadaveric and radiological analyses of safe procedures
Journal of Orthopaedics and Traumatology, 2003Co-Authors: K. Shiramizu, M. Naito, I. Asayama, M. YatsunamiAbstract:Curved periacetabular osteotomy is a modified Ganz's procedure and requires an intrapelvic osteotomy. In order to establish the osteotomy line and the chisel inserting angles during the procedure, 32 cadavers and 28 three-dimensional computed tomographs were utilized. The guidepoints for the osteotomy line were obtained from the cadaveric analysis and the inserting angles of the chisel were measured from the radiological analysis. On the supra-acetabular portion, the C-shaped osteotomy line, starting from the proximal end of the anteroinferior iliac spine, should pass above the intersection point of the arcuate line and the line passing from the proximal end of the anteroinferior iliac spine to that of the ischial spine, and the chisel inserting angle should be 17° to the anterior surface of the ilium. On the quadrilateral surface, the C-shaped line should locate one finger width anterior to the greater sciatic notch, and the chisel inserting angle should be 25° to the quadrilateral surface. On the anterior aspect of the ischium, the chisel should advance with an inserting angle of 60° to the ground at the level of one finger width below the distal Joint Edge.
M. Naito - One of the best experts on this subject based on the ideXlab platform.
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Curved periacetabular osteotomy for the dysplastic hip: cadaveric and radiological analyses of safe procedures
Journal of Orthopaedics and Traumatology, 2003Co-Authors: K. Shiramizu, M. Naito, I. Asayama, M. YatsunamiAbstract:Curved periacetabular osteotomy is a modified Ganz’s procedure and requires an intrapelvic osteotomy. In order to establish the osteotomy line and the chisel inserting angles during the procedure, 32 cadavers and 28 three-dimensional computed tomographs were utilized. The guide-points for the osteotomy line were obtained from the cadaveric analysis and the inserting angles of the chisel were measured from the radiological analysis. On the supra-acetabular portion, the C-shaped osteotomy line, starting from the proximal end of the anteroinferior iliac spine, should pass above the intersection point of the arcuate line and the line passing from the proximal end of the anteroinferior iliac spine to that of the ischial spine, and the chisel inserting angle should be 17° to the anterior surface of the ilium. On the quadrilateral surface, the C-shaped line should locate one finger width anterior to the greater sciatic notch, and the chisel inserting angle should be 25° to the quadrilateral surface. On the anterior aspect of the ischium, the chisel should advance with an inserting angle of 60° to the ground at the level of one finger width below the distal Joint Edge.
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Curved periacetabular osteotomy for the dysplastic hip: cadaveric and radiological analyses of safe procedures
Journal of Orthopaedics and Traumatology, 2003Co-Authors: K. Shiramizu, M. Naito, I. Asayama, M. YatsunamiAbstract:Curved periacetabular osteotomy is a modified Ganz's procedure and requires an intrapelvic osteotomy. In order to establish the osteotomy line and the chisel inserting angles during the procedure, 32 cadavers and 28 three-dimensional computed tomographs were utilized. The guidepoints for the osteotomy line were obtained from the cadaveric analysis and the inserting angles of the chisel were measured from the radiological analysis. On the supra-acetabular portion, the C-shaped osteotomy line, starting from the proximal end of the anteroinferior iliac spine, should pass above the intersection point of the arcuate line and the line passing from the proximal end of the anteroinferior iliac spine to that of the ischial spine, and the chisel inserting angle should be 17° to the anterior surface of the ilium. On the quadrilateral surface, the C-shaped line should locate one finger width anterior to the greater sciatic notch, and the chisel inserting angle should be 25° to the quadrilateral surface. On the anterior aspect of the ischium, the chisel should advance with an inserting angle of 60° to the ground at the level of one finger width below the distal Joint Edge.
