scholarly journals Use of 3D planning and surgical templates for the prevention of improper placement of cylindrical implants in the jaw bone

2016 ◽  
Vol 12 (2) ◽  
pp. 79-85 ◽  
Author(s):  
С. Жолудев ◽  
S. Zholudev ◽  
П. Нерсесян ◽  
P. Nersesyan ◽  
Д. Жолудев ◽  
...  
Keyword(s):  
Bone Tissue ◽  
Complete Loss ◽  
Clinical Use ◽  
X Ray ◽  
Jaw Bone ◽  
Implant Placement ◽  
Surgical Guides ◽  
Surgical Templates ◽  
Ray Methods ◽  
Clinical Cases

<p class="p1"><span class="s1"><strong>Actuality: </strong></span><span class="s2">In the treatment of patients with partial or complete loss of teeth, implants are being more widely used in prosthetics. When placement of cylindrical implants (CI), a serious complication is their wrong placement in the jaw bone tissue. </span><span class="s1"><strong>The aim of the study </strong></span><span class="s2">was rationale of the use of surgical templates as a method of prevention of improper placement of cylindrical implants. Objectives: 1. The study of the used methods of planning and placement of cylindrical implants in clinics of Yekaterinburg. 2. Analysis of errors and complications on the example of clinical cases when planning the installation of CI was done using x-ray methods when the absence of surgical templates. 3. Rationale for the use of 3D planning for implant placement and the use of surgical templates on the example of clinical cases. The results of this research was the study of the clinical use of surgical guides and software system IMPLANT-ASSISTANT® for the prevention of complications of improper installation of CI. </span></p>

Modern X-Ray Methods for Studying Bone Tissue

2020 ◽  
Vol 46 ◽  
pp. 25-34
Author(s):  
Olga Malyugina ◽  
Evgenii Kalinin ◽  
Elena Maslova ◽  
Rovshan Alekberov ◽  
Dzhamilay Murzaeva ◽  
...  
Keyword(s):  
Bone Tissue ◽  
Main Idea ◽  
Scientific Data ◽  
Diagnostic Methods ◽  
X Ray ◽  
Human Organs ◽  
Literary Sources ◽  
Tissue Research ◽  
Instrumental Methods ◽  
Ray Methods

The detailed study devoted to instrumental diagnostic methods of bone tissue research was performed by authors. The main idea which is the basis for this work is the analysis and study of X-ray methods for examining bone tissue, highlighting their advantages. As a result of the work, we analyzed published scientific data in Russian and foreign literary sources, which addresses many instrumental methods of bone tissue research. After experiments a detailed description of the most common research methods related to the study of bone tissue was given, its structure and other functions. Analysis of the modern scientific data has shown that there is a great need to know the instrumental methods for studying human organs and systems, and their more accurate possibilities for identifying pathological processes, which will permit the use of the research method that in any particular case will be the most informative, which would provide timely diagnosis and its accuracy.

scholarly journals POSTTRAUMATIC DENSITY OF THE BONE TISSUE OF THE RAT’S MANDIBLE WITHOUT PATHOLOGY, ON THE BACKGROUND OF NALBUPHINE INTAKE AND AFTER LINCOMYCIN TREATMENT

World Science ◽  
2019 ◽  
Vol 2 (11(51)) ◽  
pp. 25-29
Author(s):  
Rostyslav Sohuyko ◽  
Zoryana Masna ◽  
Khrystyna Pavliv
Keyword(s):  
Bone Tissue ◽  
Traumatic Injury ◽  
Experimental Conditions ◽  
X Ray ◽  
Pathological Conditions ◽  
Long Time ◽  
Tissue Reconstruction ◽  
Density Dynamics ◽  
Ray Methods ◽  
Qualitative Changes

Numerous dental manipulations are accompanied by bone injuries. Various types of drug correction are widely used for correction and optimization of bone tissue reconstruction after bone-traumatic injury. The evaluation of the course of reparative osteogenesis becomes possible with the x-ray methods which gives the possibility to evaluate and predict early quantitative and qualitative changes in various pathological conditions, as well as to trace their dynamics in clinical and experimental conditions. In our research we have find out the peculiarities of the density dynamics of the bone tissue of the mandible after causing bone-traumatic injury to intact animals and animals that have been taking nalbuphine for a long time, as well as after treatment with lincomycin.

scholarly journals MODERN KNOWLEDGE AND CLINICAL PERSPECTIVES OF USE FOR POSITIONING DENTAL IMPLANTS OF SURGICAL TEMPLATES. LITERATURE REVIEW

2017 ◽  
Vol 13 (4) ◽  
pp. 74-80 ◽  
Author(s):  
Петрос Нерсесян ◽  
Petros Nersesyan ◽  
Сергей Жолудев ◽  
Sergey Zholudev
Keyword(s):  
Dental Implants ◽  
Three Dimensional ◽  
Bibliographic Databases ◽  
Anatomical Structures ◽  
Aesthetic Result ◽  
Advantages And Disadvantages ◽  
Implant Placement ◽  
Surgical Guides ◽  
Modern Knowledge ◽  
Surgical Templates

Subject. Since the mid-20th century, there has been an increase of interest in implantation for the treatment of partial and complete loss of teeth. P. I. Branemark was one of the first pioneers who developed an implant that forms osseointegration. Anatomical restrictions and restorative requirements prompt the implantologist to achieve the accuracy of planning and surgical positioning of dental implants. The ideal placement of the implant facilitates the creation of favorable forces on implants and prosthetic structures, and also provides an aesthetic result. Therefore, it is advisable to establish a logical continuity between the planned restoration and the surgical stages, it is important to use the transmitting device, which undoubtedly increases the effectiveness of the implantation. In 1987, M. J. Edge et al. recommended the use of surgical guides before the implantation operation. Currently, surgical templates have become increasingly used. The article presents data on the features of planning of implant placement and the technology of applying a surgical template for positioning the dental implant unit. Goal. To show the value of using surgical templates for the rational installation of dental implants and preventing possible errors and complications. Methodology. A search for literature using search engines such as Google, Yahoo and scientific bibliographic databases such as PubMed, Medline and textbooks was conducted until September 2017 using medical thematic headings like «Dental Implants», «Surgical Templates». More than 300 sources of literature were identified, after studying which they reduced to 28 sources of articles and literary reviews. Conclusions. The study of available to us literature, revealed the advantages and disadvantages of using surgical templates. The main advantages: precise placement of implants, preservation of anatomical structures; three-dimensional technology allows to accurately estimate anatomical points, such as the size of the maxillary sinus in the upper jaw and the location of the alveolar nerve in the lower jaw, high observable accuracy of 0.1 mm, reduction of the time of surgical intervention. Disadvantages: lack of visibility and tactile control during the surgical procedure, insufficient opening of the mouth jeopardizes the result of complex treatment, there is a risk of damage to vital anatomical structures.

Precision of Implant Placement With Stereolithographic Templates: A Pilot In Vitro Study

2012 ◽  
Vol 38 (5) ◽  
pp. 569-574 ◽  
Author(s):  
Hakan Bilhan ◽  
Selda Arat ◽  
Emre Mumcu ◽  
Onur Geckili ◽  
Olcay Şakar
Keyword(s):  
Vertical Direction ◽  
In Vitro Study ◽  
3 Dimensional ◽  
Implant Placement ◽  
Surgical Guides ◽  
Human Cadavers ◽  
Surgical Templates ◽  
Formalin Fixed ◽  
Stereolithographic Models

This pilot study assesses the accuracy of 2 bone-supported stereolithographic surgical templates with respect to placement of implants in originally planned positions, and it tests the precision of dental volumetric tomography planning. Two mandibles retrieved from formalin-fixed human cadavers were scanned by dental volumetric tomography for planning of the implant positions, leading to stereolithographic models and fabrication of surgical guides. The situation immediately following drilling and implant insertion by an experienced surgeon was scanned and the outcome compared with the initial planning. The 3-dimensional discrepancies were then analyzed and determined. The results show deviations of the placed implants from the original planning, especially in the vertical direction, making the seating of a prefabricated denture impossible. At present, the flapless surgery technique based on stereolithographic surgical templates appears unsafe; further improvement is required.

Vitamin D Effects on Guided Bone Regeneration and Osseointegration of Dental Implants (Literature Review)

2020 ◽  
Vol 75 (5) ◽  
pp. 552-560
Author(s):  
Sergey Yu. Ivanov ◽  
Svetlana Yu. Kalinchenko ◽  
Nidjat A. Guseynov ◽  
Aleksander A. Muraev ◽  
Aigul Т. Safi ◽  
...  
Keyword(s):  
Vitamin D ◽  
Bone Tissue ◽  
Dental Implants ◽  
Scientific Data ◽  
Reparative Regeneration ◽  
Jaw Bone ◽  
Dental Implantation ◽  
Oral Reconstruction ◽  
Phosphate Exchange ◽  
Regeneration Of Bone

Background.Due to the prevalence of Vitamin D deficiency as well as the frequency of reconstructive surgical interventions followed by dental implantation, the issue arises concerning the effect of Vitamin D on reparative regeneration of bone and osseointegration of dental implants.The purpose using literature data we are conducting an impact assessment of vitamin D on reparative regeneration of bone tissue, in particular, after oral reconstruction surgeries and dental implantation.Methods.Retrieval, systematization and analysis of scientific data on application of vitamin D supplementation and its effect on reparative regeneration of jaw bone tissue.The conclusions.For the most part, the positive effect exerted on reparative regeneration of jaw bone tissue and osseointegration of dental implants is due to the role of vitamin D in physiological processes evolving in bone tissue, namely maintenance of calcium and phosphate exchange through intestinal absorption and TNF, RANKL (Receptor activator of nuclear factor kappa-B ligand) and consequently differentiation of precursors to osteoclasts into osteoclasts through VDR stimulation (VitaminD Receptor) receptors for further osteogenesis. Also, according to literature data, FGF23 (Fibroblast Growth Factor) protein is a marker of osteoblasts differentiation into osteocytes, it is also known that FGF23 and 1,25(ОН)2D3 are genetically related. FGF23 is the main regulator of both phosphate exchange in bones and metabolism of vitamin D and its metabolites. Besides, indirect anti-inflammatory effect has been observed thanks to inhibition of pro-inflammatory cytokine secretion. Taking into account the abovementioned data, of particular relevance is the definition of serum concentration 25(ОН)D and development of schemes of vitamin D level pre-surgery correction in patients, who have to undergo oral reconstruction surgeries and dental implantation. Mass spectrometry is a promising diagnostic method for determining the level of vitamin D in a body, as it allows to identify the actual amount of vitamin D free from admixture of other steroid hormones. The introduction of this method into clinical practice will allow to monitor the level of vitamin D in patients, receiving reconstructive and rehabilitative treatment.

scholarly journals COVID-19 infection map generation and detection from chest X-ray images

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Aysen Degerli ◽  
Mete Ahishali ◽  
Mehmet Yamac ◽  
Serkan Kiranyaz ◽  
Muhammad E. H. Chowdhury ◽  
...  
Keyword(s):  
State Of The Art ◽  
Ground Truth ◽  
Clinical Use ◽  
X Ray ◽  
Learning Techniques ◽  
Map Generation ◽  
Severity Grading ◽  
Chest X Ray ◽  
Novel Method ◽  
Aided Diagnosis

AbstractComputer-aided diagnosis has become a necessity for accurate and immediate coronavirus disease 2019 (COVID-19) detection to aid treatment and prevent the spread of the virus. Numerous studies have proposed to use Deep Learning techniques for COVID-19 diagnosis. However, they have used very limited chest X-ray (CXR) image repositories for evaluation with a small number, a few hundreds, of COVID-19 samples. Moreover, these methods can neither localize nor grade the severity of COVID-19 infection. For this purpose, recent studies proposed to explore the activation maps of deep networks. However, they remain inaccurate for localizing the actual infestation making them unreliable for clinical use. This study proposes a novel method for the joint localization, severity grading, and detection of COVID-19 from CXR images by generating the so-called infection maps. To accomplish this, we have compiled the largest dataset with 119,316 CXR images including 2951 COVID-19 samples, where the annotation of the ground-truth segmentation masks is performed on CXRs by a novel collaborative human–machine approach. Furthermore, we publicly release the first CXR dataset with the ground-truth segmentation masks of the COVID-19 infected regions. A detailed set of experiments show that state-of-the-art segmentation networks can learn to localize COVID-19 infection with an F1-score of 83.20%, which is significantly superior to the activation maps created by the previous methods. Finally, the proposed approach achieved a COVID-19 detection performance with 94.96% sensitivity and 99.88% specificity.

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