Landmark-based Approach to Examining Changes in Arch Shape PDF Download
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Author: Taylor Blake Varner
Publisher:
ISBN:
Category : Dental arch
Languages : en
Pages : 119
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Book Description
Objective: Variation in dental arch shape and arch relations from the primary to the permanent dentition were studied in an untreated longitudinal sample from the Iowa Fluoride Study and Growth Study data (55 females and 63 males). Methods: 3D coordinate data from 68 landmarks located on maxillary, mandibular, and occlusal dental cast scans from ages 5, 9, and 13 were submitted to a Procrustes fit prior to a Principal Component (PC) analysis to capture symmetric and asymmetric aspects of arch shape variation. Covariance pattern models were used to determine longitudinal arch shape changes from the primary to the permanent dentition and to correlate these changes with Angle class molar classification. Results: The first 3 principal components capture 52-78% of the variation in arch shape. PC1 explains 30-44% of the variance and captures changes in overall dentoalveolar height. PC2 explains 14-22% and shows mainly variation in dentoalveolar height and width at the canines. Lastly, PC3 explains 8-12% and captures overall arch width and perimeter differences and changes in anteroposterior arch relations. Results on symmetric shape variation for the occlusal data set captured significant differences (p
Author: Taylor Blake Varner
Publisher:
ISBN:
Category : Dental arch
Languages : en
Pages : 119
Get Book Here
Book Description
Objective: Variation in dental arch shape and arch relations from the primary to the permanent dentition were studied in an untreated longitudinal sample from the Iowa Fluoride Study and Growth Study data (55 females and 63 males). Methods: 3D coordinate data from 68 landmarks located on maxillary, mandibular, and occlusal dental cast scans from ages 5, 9, and 13 were submitted to a Procrustes fit prior to a Principal Component (PC) analysis to capture symmetric and asymmetric aspects of arch shape variation. Covariance pattern models were used to determine longitudinal arch shape changes from the primary to the permanent dentition and to correlate these changes with Angle class molar classification. Results: The first 3 principal components capture 52-78% of the variation in arch shape. PC1 explains 30-44% of the variance and captures changes in overall dentoalveolar height. PC2 explains 14-22% and shows mainly variation in dentoalveolar height and width at the canines. Lastly, PC3 explains 8-12% and captures overall arch width and perimeter differences and changes in anteroposterior arch relations. Results on symmetric shape variation for the occlusal data set captured significant differences (p
Author: Qipeng Song
Publisher: Frontiers Media SA
ISBN: 2832539262
Category : Science
Languages : en
Pages : 334
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Book Description
Biomechanical performance is a key to evaluating effectiveness in physical medicine and rehabilitation for neuromusculoskeletal disorders. Assessments can be applied to degenerative dysfunction (e.g., falls or knee osteoarthritis in older adults) and sports-related injuries (e.g., ankle sprain or anterior cruciate ligament injury). Patients' body movements and daily activity functions can be compared to the state of pre-injury condition or to the level of healthy individuals. Some cutting-edge studies have gone a step further and used biomechanical performance to develop physical medicine and rehabilitation approaches and explore the mechanisms behind their effectiveness. However, such studies are still relatively rare. This research topic is intended to encourage more relevant projects to be published. This research topic aims to encourage researchers to use biomechanical performance to design advanced physical medicine and rehabilitation approaches, evaluate the effectiveness of the rehabilitation approaches, and explore the mechanisms by which rehabilitation approaches work for neuromusculoskeletal disorders. Some studies have developed stretching approaches for the rehabilitation of knee osteoarthritis in older adults by measuring biomechanical performance during functional activities. Some studies indicated that the mechanism of physical activity to reduce falls in older adults lies in its effectiveness in increasing proprioceptive sensitivity, and further indicated that rehabilitation of proprioception may be a key to reducing falls in the fall-prone older adult population. Some other studies analyzed biomechanical performance in ankle ligament injuries to understand when, how, and why ligaments fail. As a result, this research topic will expand the application of biomechanical performance to better understand and treat neuromusculoskeletal disorders.
Author: Scott D. Palumbo
Publisher: Center for Comparative Arch
ISBN: 1877812927
Category : Social Science
Languages : en
Pages : 194
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Book Description
Chapters offer new understandings of how ranked societies emerged and developed in prehistoric southern Central America and northern South America (the "Isthmo-Colombian Area"). The emphasis is on integrating the results of studies of social units at a range of different scales from the household to the local commuity to the region and beyond. Complete text in English and Spanish.
Author: Vincent Duffy
Publisher: CRC Press
ISBN: 1439835128
Category : Computers
Languages : en
Pages : 664
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Book Description
This volume is concerned with digital human modeling. The utility of this area of research is to aid the design of systems that are benefitted from reducing the need for physical prototyping and incorporating ergonomics and human factors earlier in design processes. Digital human models are representations of some aspects of a human that can be ins
Author: Stephen F. Albert, D.P.M., C.Ped., FACFAOM
Publisher: Bipedmed, LLC
ISBN: 0978896114
Category : Medical
Languages : en
Pages : 447
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Book Description
Biomechanics is the study of the human body and how it behaves mechanically. This textbook is intended for all who have an interest in how our feet and legs work and particularly for those in the health care community who must remain abreast of the latest information and research. Written by leaders in the field, this books covers in detail current theoretical and applied concepts. You will find Lower Extremity Biomechanics: Theory and Practice Volume 1 a welcomed addition to your professional library.
Author: Miriam Zelditch
Publisher: Academic Press
ISBN: 0123869048
Category : Mathematics
Languages : en
Pages : 489
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Book Description
The first edition of Geometric Morphometrics for Biologists has been the primary resource for teaching modern geometric methods of shape analysis to biologists who have a stronger background in biology than in multivariate statistics and matrix algebra. These geometric methods are appealing to biologists who approach the study of shape from a variety of perspectives, from clinical to evolutionary, because they incorporate the geometry of organisms throughout the data analysis. The second edition of this book retains the emphasis on accessible explanations, and the copious illustrations and examples of the first, updating the treatment of both theory and practice. The second edition represents the current state-of-the-art and adds new examples and summarizes recent literature, as well as provides an overview of new software and step-by-step guidance through details of carrying out the analyses. Contains updated coverage of methods, especially for sampling complex curves and 3D forms and a new chapter on applications of geometric morphometrics to forensics Offers a reorganization of chapters to streamline learning basic concepts Presents detailed instructions for conducting analyses with freely available, easy to use software Provides numerous illustrations, including graphical presentations of important theoretical concepts and demonstrations of alternative approaches to presenting results
Author:
Publisher:
ISBN:
Category : Anthropology
Languages : en
Pages : 456
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Book Description
Annual compilation of critical articles from all areas of the discipline of anthropology.
Author: Dennis E. Slice
Publisher: Springer Science & Business Media
ISBN: 0387276149
Category : Social Science
Languages : en
Pages : 392
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Book Description
Morphometrics has undergone a revolutionary transformation in the past two decades as new methods have been developed to address shortcomings in the traditional multivirate analysis of linear distances, angles, and indices. While there is much active research in the field, the new approaches to shape analysis are already making significant and ever-increasing contributions to biological research, including physical anthropology. Modern Morphometrics in Physical Anthropology highlights the basic machinery of the most important methods, while introducing novel extensions to these methods and illustrating how they provide enhanced results compared to more traditional approaches. Modern Morphometrics in Physical Anthropology provides a comprehensive sampling of the applications of modern, sophisticated methods of shape analysis in anthropology, and serves as a starting point for the exploration of these practices by students and researchers who might otherwise lack the local expertise or training to get started. This text is an important resource for the general morphometric community that includes ecologists, evolutionary biologists, systematists, and medical researchers.
Author: adrienne maree brown
Publisher: AK Press
ISBN: 1849352615
Category : Social Science
Languages : en
Pages : 210
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Book Description
In the tradition of Octavia Butler, here is radical self-help, society-help, and planet-help to shape the futures we want. Change is constant. The world, our bodies, and our minds are in a constant state of flux. They are a stream of ever-mutating, emergent patterns. Rather than steel ourselves against such change, Emergent Strategy teaches us to map and assess the swirling structures and to read them as they happen, all the better to shape that which ultimately shapes us, personally and politically. A resolutely materialist spirituality based equally on science and science fiction: a wild feminist and afro-futurist ride! adrienne maree brown, co-editor of Octavia’s Brood: Science Fiction from Social Justice Movements, is a social justice facilitator, healer, and doula living in Detroit.
Author: Tracy L. Kivell
Publisher: Springer
ISBN: 1493936468
Category : Science
Languages : en
Pages : 587
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Book Description
This book demonstrates how the primate hand combines both primitive and novel morphology, both general function with specialization, and both a remarkable degree of diversity within some clades and yet general similarity across many others. Across the chapters, different authors have addressed a variety of specific questions and provided their perspectives, but all explore the main themes described above to provide an overarching “primitive primate hand” thread to the book. Each chapter provides an in-depth review and critical account of the available literature, a balanced interpretation of the evidence from a variety of perspectives, and prospects for future research questions. In order to make this a useful resource for researchers at all levels, the basic structure of each chapter is the same, so that information can be easily consulted from chapter to chapter. An extensive reference list is provided at the end of each chapter so the reader has additional resources to address more specific questions or to find specific data.
