Long-Term Assessment of Early Alveolar Bone Grafts Using Three-Dimensional Computer-Assisted Tomography: A Pilot Study

Abstract The quality of welded joints depends on many factors. The relevant standards stipulate technical conditions of welds quality assessment, which provides the basis for stating whether the given joint is compatible with the requirements or whether it is defective. In practice, making welded joints that are totally devoid of defects is extremely difficult. To conduct the control of inner structure of the given joint a non-destructive method with the application of industrial CT scanner might be applied. This modern diagnosing method combines the x-ray examination with advanced computer technology. The basic advantage of computer-assisted tomography consists in examining objects in three dimensions and the possibility to carry out three-dimensional reconstructions. The aim of this article is to discuss the use of this method to evaluate the quality of welded joints made of aluminium alloys. Capabilities of computer-assisted tomography were depicted by the case of weld probes constructed with TIG (ang. Tungsten Inert Gas) welding by different process variables. One has made the analysis of the quality of probes showing the smallest and the biggest internal and external welding defects.

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Virtual reality and augmented reality applications and simulation in vascular access management with three-dimensional visualization

The Journal of Vascular Access ◽

10.1177/1129729818776904 ◽

2019 ◽

Vol 20 (1_suppl) ◽

pp. 65-70

Author(s):

Itsuo Yokoyama ◽

Tsuyosi Sarai ◽

Toshinori Asai ◽

Nobuyuki Kitou ◽

Hirotaka Nozaki ◽

...

Keyword(s):

Virtual Reality ◽

Augmented Reality ◽

Vascular Access ◽

Three Dimensional ◽

Computer Assisted ◽

Access Management ◽

Computer Assisted Tomography ◽

Graphics Software ◽

Anatomical Information ◽

Tomography Scan

Obtaining adequate and precise anatomical information is mandatory to prevent vascular access–related complications in dialysis patients. For this purpose, we underwent Doppler ultrasound, vascular access angiogram, and plain computer-assisted tomography scan of the arm with vascular access. With the use of computer graphics software, the anatomical structure of the vascular access can be visualized three dimensionally which is shared among the staffs for precise and better recognition. Furthermore, created object is applicable for virtual reality and/or augmented reality presentation that provides useful means for education and practical procedures in the management of vascular access.

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False ankylosis of the temporomandibular joint in a cat

Veterinary and Comparative Orthopaedics and Traumatology ◽

10.3415/vcot-15-01-0010 ◽

2015 ◽

Vol 28 (06) ◽

pp. 455-458 ◽

Cited By ~ 1

Author(s):

N. Jamet ◽

L. Larguier

Keyword(s):

3D Reconstruction ◽

Temporomandibular Joint ◽

Objective Assessment ◽

Three Dimensional ◽

Computer Assisted ◽

Office Visits ◽

Computer Assisted Tomography ◽

Postoperative Physical Therapy ◽

One Year ◽

Joint Range

SummaryObjective: To describe the use of two- dimensional computer-assisted tomography (CT) with three-dimensional (3D) reconstruction in the diagnosis and planning of surgical treatment of a case of false ankylosis of the temporomandibular joint.Case report: A young European Shorthaired cat was presented with the complaint of inability to eat and open its jaws. A CT scan with 3D reconstruction allowed visualization of the lesion which was causing extra- articular ankylosis of the temporomandibular joint. Surgery was performed to resect an osseous lesion of the zygomatic arch, thus freeing the temporomandibular joint. Postoperative physical therapy was initiated immediately following surgery, and then carried out by the owner with a one year follow-up. Clinical examination of the cat was performed during regular office visits (at 1 month and 3 months following surgery), which allowed objective assessment of postoperative recuperation. At the end of a year, the owners reported that the cat had maintained sufficient jaw opening without any signs consistent with chronic pain.Conclusion: Computed tomography scan with 3D reconstruction allowed planning of the surgical correction of extra-articular ankylosis of the temporomandibular joint, and in this case condylectomy was avoided, since temporomandibular joint range-of-motion was maintained.

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Present and Future Spinal Robotic and Enabling Technologies

Operative Neurosurgery ◽

10.1093/ons/opaa338 ◽

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.

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Use of 3-D Printed Models for Implant Placement - A Case Series

Journal of Dentistry and Oral Sciences ◽

10.37191/mapsci-2582-3736-3(4)-108 ◽

2021 ◽

Author(s):

Soundariya Bala Muralei

Keyword(s):

Dental Implants ◽

Alveolar Bone ◽

Three Dimensional ◽

Case Series ◽

Proper Position ◽

Anatomical Structures ◽

Long Term Stability ◽

Implant Placement ◽

Plaster Models

Long-term stability of a dental implant depends on various factors, one among them is proper position within the alveolar bone. Pre-operative thorough examination of the surgical site is preliminary step while planning dental implants. Conventional techniques such as Intra-Oral Periapical Radiograph and Ortho Pantamogram sometimes not sufficient and clinical scenario always surprises the surgeon. Later advent of Cone-Beam Computed Tomography alleviated this problem to some extent but there are some clinical situations such as resorbed ridge where better visualisation is needed. This led to the innovation of rapid prototyping techniques for the fabrication of three-dimensional complex structures. This technology has numerous applications from the development of an instrument, 3-D printed anatomical models to the fabrication of 3-D printed tissues for regeneration procedures. A 3-D printed model is much more useful than plaster models in many aspects such as demonstrating anatomical structures, better treatment planning, and better understanding for the patient. Hence, this case series focuses on the use of 3-D printed models in the placement of dental implants.

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Three-Dimensional Nuclear Telomere Profiling as a Biomarker for Recurrence in Oligodendrogliomas: A Pilot Study

International Journal of Molecular Sciences ◽

10.3390/ijms21228539 ◽

2020 ◽

Vol 21 (22) ◽

pp. 8539

Author(s):

Macoura Gadji ◽

Shubha Mathur ◽

Brigitte Bélanger ◽

Jaganmohan Reddy Jangamreddy ◽

Josée Lamoureux ◽

...

Keyword(s):

Pilot Study ◽

Fluorescent In Situ Hybridization ◽

Three Dimensional ◽

Telomere Dysfunction ◽

Short Term ◽

Time To Recurrence ◽

Potential Link ◽

Touch Preparation

Mechanisms of recurrence in oligodendrogliomas are poorly understood. Recurrence might be driven by telomere dysfunction-mediated genomic instability. In a pilot study, we investigated ten patients with oligodendrogliomas at the time of diagnosis (first surgery) and after recurrence (second surgery) using three-dimensional nuclear telomere analysis performed with quantitative software TeloView® (Telo Genomics Corp, Toronto, Ontario, Canada). 1p/19q deletion status of each patient was determined by fluorescent in situ hybridization on touch preparation slides. We found that a very specific 3D telomeric profile was associated with two pathways of recurrence in oligodendrogliomas independent of their 1p/19q status: a first group of 8 patients displayed significantly different 3D telomere profiles between both surgeries (p < 0.0001). Their recurrence happened at a mean of 231.375 ± 117.42 days and a median time to progression (TTP) of 239 days, a period defined as short-term recurrence; and a second group of three patients displayed identical 3D telomere profiles between both surgery samples (p > 0.05). Their recurrence happened at a mean of 960.666 ± 86.19 days and a median TTP of 930 days, a period defined as long-term recurrence. Our results suggest a potential link between nuclear telomere architecture and telomere dysfunction with time to recurrence in oligodendrogliomas, independently of the 1p/19q status.

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Evaluation of a Training Program to Reduce Stressful Trunk Postures in the Nursing Professions: A Pilot Study

Annals of Work Exposures and Health ◽

10.1093/annweh/wxw002 ◽

2017 ◽

Vol 61 (1) ◽

pp. 22-32 ◽

Cited By ~ 5

Author(s):

Agnessa Kozak ◽

Sonja Freitag ◽

Albert Nienhaus

Keyword(s):

Pilot Study ◽

Training Program ◽

Measurement Data ◽

Computer Assisted ◽

Body Postures ◽

Video Footage ◽

Video Recordings ◽

Raising Awareness ◽

Median Proportion

Abstract Objectives: The aim of this pilot study was to evaluate metrologically the effectiveness of a training program on the reduction of stressful trunk postures in geriatric nursing professions. Methods: A training program, consisting of instruction on body postures in nursing, practical ergonomic work methods at the bedside or in the bathroom, reorganization of work equipment, and physical exercises, was conducted in 12 wards of 6 nursing homes in Germany. The Computer-Assisted Recording and Long-Term Analysis of Musculoskeletal Loads (CUELA) measurement system was used to evaluate all movements and trunk postures adopted during work before and 6 months after the training program. In total, 23 shifts were measured. All measurements were supported by video recordings. A specific software program (WIDAAN 2.75) was used to synchronize the measurement data and video footage. Results: The median proportion of time spent in sagittal inclinations at an angle of >20° was significantly reduced (by 29%) 6 months after the intervention [from 35.4% interquartile range (27.6–43.1) to 25.3% (20.7–34.1); P < 0.001]. Very pronounced inclinations exceeding 60° [2.5% (1.1–4.6) to 1.0% (0.8–1.7); P = 0.002] and static inclinations of over 20° for >4 s [4.4% (3.0–6.7) to 3.6% (2.5–4.5); P < 0.001] were significantly reduced, by 60% and 22%, respectively. Video analysis showed that in 49% of care situations, ergonomic measures were implemented properly, either at the bedside or in the bathroom. Conclusions: Stressful trunk postures could be significantly reduced by raising awareness of the physical strains that frequently occur during a shift, by changes in work practices and by redesigning the work environment. Workplace interventions aimed at preventing or reducing low back pain in nursing personnel would probably benefit from sensitizing employees to their postures during work.

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Gene and Cell Therapy in Dental Tissue Regeneration

10.5772/intechopen.97757 ◽

2021 ◽

Author(s):

Juan Andrés de Pablo ◽

Luis Javier Serrano ◽

Mariano García-Arranz ◽

Luis Romeu ◽

Antonio Liras

Keyword(s):

Cell Therapy ◽

Bone Morphogenetic Proteins ◽

Alveolar Bone ◽

Three Dimensional ◽

Dental Practice ◽

Dental Tissue ◽

Advanced Therapies ◽

Medical Advances

Advanced therapies hold substantial promise for the treatment of periodontal conditions. Gene therapy has the potential to transfer “therapeutic” genes, which express proteins such as bone morphogenetic proteins, osteoprotegerin, and tissue nonspecific alkaline phosphatase, which is deficient in patients with hypophosphatasia, a condition that affects mineralization of teeth and bone. Transferred genes may also express platelet-derived growth factor, which modulates the growth of periodontal tissue and the alveolar bone. As regards cell therapy, several clinical trials have shown that mesenchymal stem cells, when used with different kinds of scaffolds to enable the required three-dimensional environment, possess a bone regeneration potential that is particularly useful in such disorders as osteoporosis and osteonecrosis, or for regenerating alveolar bone (osseointegration) prior to placing a dental implant. However, much work is still required before these new therapies become true alternatives in routine clinical dental practice. Medical advances require investments, which are usually influenced by the priorities of both politicians and society at large. This will contribute to promoting innovation, efficient treatments, medium- and long-term savings, and a higher quality of life.

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