Three-dimensional computer-assisted study model analysis of long-term oral-appliance wear. Part 1: Methodology

2008 ◽  
Vol 134 (3) ◽  
pp. 393-407 ◽  
Author(s):  
Hui Chen ◽  
Alan A. Lowe ◽  
Fernanda Riberiro de Almeida ◽  
Mary Wong ◽  
John A. Fleetham ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Oral Appliance ◽  
Model Analysis ◽  
Computer Assisted

scholarly journals Present and Future Spinal Robotic and Enabling Technologies

2021 ◽  
Vol 21 (Supplement_1) ◽  
pp. S48-S56
Author(s):  
Siri Sahib S Khalsa ◽  
Praveen V Mummaneni ◽  
Dean Chou ◽  
Paul Park
Keyword(s):  
Intraoperative Imaging ◽  
Three Dimensional ◽  
Robotic Systems ◽  
Computer Assisted ◽  
Assisted Navigation ◽  
Planning Software ◽  
Enabling Technologies ◽  
Advanced Planning ◽  
Spinal Navigation

Abstract Enabling technologies include surgical planning software, computer-assisted navigation, intraoperative three-dimensional (3D) imaging, and robotic systems. Presently, these technologies are in various stages of refinement. Spinal robots in particular are currently limited to the positioning of an alignment guide for pedicle screw placement. Current generation spinal robots, therefore, play a more limited role in spinal surgery. In contrast to spinal robots, intraoperative imaging technology has been developed further, to a stage that allows accurate 3D spinal image acquisition that can be readily utilized for spinal navigation. The integration of these various technologies has the potential to maximize the safety, consistency, reliability, and efficacy of surgical procedures. To that end, the trend for manufacturers is to incorporate various enabling technologies into the spinal robotic systems. In the near-term, it is expected that integration of more advanced planning software and navigation will result in wider applicability and value. In the long-term, there are a variety of enabling technologies such as augmented reality that may be a component of spinal robots. This article reviews the features of currently available spinal robots and discusses the likely future advancements of robotic platforms in the near- and long-term.

scholarly journals Dental changes evaluated with a 3D computer-assisted model analysis after long-term tongue retaining device wear in OSA patients

2008 ◽  
Vol 13 (1) ◽  
pp. 117-117
Author(s):  
Hui Chen ◽  
Alan A. Lowe ◽  
Arthur M. Strauss ◽  
Fernanda Riberiro de Almeida ◽  
Hiroshi Ueda ◽  
...  
Keyword(s):  
Model Analysis ◽  
Computer Assisted

Long-term sequellae of oral appliance therapy in obstructive sleep apnea patients: Part 2. Study-model analysis

2006 ◽  
Vol 129 (2) ◽  
pp. 205-213 ◽  
Author(s):  
Fernanda Ribeiro de Almeida ◽  
Alan A. Lowe ◽  
Ryo Otsuka ◽  
Sandra Fastlicht ◽  
Maryam Farbood ◽  
...  
Keyword(s):  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Oral Appliance ◽  
Model Analysis ◽  
Oral Appliance Therapy ◽  
Obstructive Sleep

scholarly journals The outcome of skeletofacial reconstruction with mandibular rotation for management of asymmetric skeletal class III deformity: A three-dimensional computer-assisted investigation

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Ting-Yu Wu ◽  
Rafael Denadai ◽  
Hsiu-Hsia Lin ◽  
Cheng-Ting Ho ◽  
Lun-Jou Lo
Keyword(s):  
Three Dimensional ◽  
Mouth Opening ◽  
Facial Asymmetry ◽  
Computer Assisted ◽  
Rigid Fixation ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Skeletal Class ◽  
Jaw Surgery

Abstract The mandibular proximal ramus segments should be moved and rotated during orthognathic surgery-based skeletofacial reconstruction for the correction of challenging patients with facial asymmetry and malocclusion, but quantitative data regarding this rotation were not sufficient to date. This 3D computer-assisted study measured the proximal ramus segment rotation after 3D simulation-guided two-jaw surgery in patients with facial asymmetric deformity and class III malocclusion (n = 31). Using 3D mandible models and a reliable proximal ramus segment-related plane, angular changes in pitch, roll and yaw directions were measured before and one month after surgery. Significant rotational changes (p < 0.01) were observed in the left and right sides and overall proximal ramus segments after surgery, with absolute differences of 4.1 ± 3.0 (range −7.8 to 6.9), 2.8 ± 2.3 (−8.8 to 5.0), and 2.7 ± 2.4 (−6.6 to 9.9) degrees in pitch, roll, and yaw rotations, respectively. Numbness and mouth opening limiting occurred within the first 6 months after surgery but the patients had an unremarkable long-term postoperative course, with no revisionary surgery required. This study contributes to the multidisciplinary-related literature by revealing that proximal ramus segment rotation and rigid fixation with no postoperative intermaxillary immobilization was practicable in skeletofacial surgery for the successful treatment of asymmetric deformity and class III malocclusion.

Dental changes evaluated with a 3D computer-assisted model analysis after long-term tongue retaining device wear in OSA patients

2007 ◽  
Vol 12 (2) ◽  
pp. 169-178 ◽  
Author(s):  
Hui Chen ◽  
Alan A. Lowe ◽  
Arthur M. Strauss ◽  
Fernanda Riberiro de Almeida ◽  
Hiroshi Ueda ◽  
...  
Keyword(s):  
Model Analysis ◽  
Computer Assisted

Computer Assisted Image Reconstruction of Oligomer Structure

1976 ◽  
Vol 34 ◽  
pp. 472-473
Author(s):  
A.M. Jones ◽  
A. Max Fiskin
Keyword(s):  
Three Dimensional ◽  
Depth Of Field ◽  
Computer Assisted ◽  
Projection Data ◽  
Two Dimensional ◽  
Single Particles ◽  
Dimensional Reconstruction ◽  
Computer Assisted Image ◽  
The Fourier Transform ◽  
Space Approach

If the tilt of a specimen can be varied either by the strategy of observing identical particles orientated randomly or by use of a eucentric goniometer stage, three dimensional reconstruction procedures are available (l). If the specimens, such as small protein aggregates, lack periodicity, direct space methods compete favorably in ease of implementation with reconstruction by the Fourier (transform) space approach (2). Regardless of method, reconstruction is possible because useful specimen thicknesses are always much less than the depth of field in an electron microscope. Thus electron images record the amount of stain in columns of the object normal to the recording plates. For single particles, practical considerations dictate that the specimen be tilted precisely about a single axis. In so doing a reconstructed image is achieved serially from two-dimensional sections which in turn are generated by a series of back-to-front lines of projection data.

Practical electron tomography

1995 ◽  
Vol 53 ◽  
pp. 742-743
Author(s):  
C.L. Woodcock
Keyword(s):  
Electron Tomography ◽  
Tomographic Reconstruction ◽  
Three Dimensional ◽  
3D Shape ◽  
Computational Resources ◽  
Shape Of Particles

Despite the potential of the technique, electron tomography has yet to be widely used by biologists. This is in part related to the rather daunting list of equipment and expertise that are required. Thanks to continuing advances in theory and instrumentation, tomography is now more feasible for the non-specialist. One barrier that has essentially disappeared is the expense of computational resources. In view of this progress, it is time to give more attention to practical issues that need to be considered when embarking on a tomographic project. The following recommendations and comments are derived from experience gained during two long-term collaborative projects.Tomographic reconstruction results in a three dimensional description of an individual EM specimen, most commonly a section, and is therefore applicable to problems in which ultrastructural details within the thickness of the specimen are obscured in single micrographs. Information that can be recovered using tomography includes the 3D shape of particles, and the arrangement and dispostion of overlapping fibrous and membranous structures.

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