scholarly journals Carbon/carbon implants in oral and maxillofacial surgery – Part 2

2012 ◽  
Vol 153 (19) ◽  
pp. 744-750 ◽  
Author(s):  
Béla Sebők ◽  
Gábor Kiss ◽  
Péter János Szabó ◽  
Dániel Rigler ◽  
László Milán Molnár ◽  
...  
Keyword(s):  
Human Body ◽  
State Of The Art ◽  
Maxillofacial Surgery ◽  
Thick Layer ◽  
The Body ◽  
Oral And Maxillofacial Surgery ◽  
Carbon Fibres ◽  
Aesthetic Results ◽  
Main Components

In their previous report, the authors presented observations regarding the long-term application of carbon/carbon implants. After evaluating the good functional and aesthetic results, the effect of the human body on the structure and morphology of the implants was investigated with state of the art methods. An implant retrieved from the body after eight years was compared to implants which were sterilized but not implanted (reference). Carbon and oxygen were the main components of both implants, however, as a result of the interaction with the human body the amount of oxygen increased 3–4 times and phosphorus, sulphur, calcium and iron were detectable as trace elements on the surface. The width of the carbon fibres (5–7 µm) building up the implants was not changed during the interaction with the human body. The surface of the implant retrieved from the human body was covered with a 15–17 µm thick layer, not present on the reference implant, having a similar composition to that of the carbon fibres (high amount of calcium that is typical to bone tissue was not detected). According to these results, the structure and the morphology of the implants were not altered notably by the human body. Orv. Hetil., 2012, 153, 744–750.

Functional analysis of chondroitin 4 sulfate constituting osseointegration

Impact ◽  
2019 ◽  
Vol 2019 (8) ◽  
pp. 18-20
Author(s):  
Shuhei Tsuchiya
Keyword(s):  
Functional Analysis ◽  
Extracellular Matrix ◽  
Dental Implants ◽  
Maxillofacial Surgery ◽  
The Body ◽  
Oral And Maxillofacial Surgery ◽  
Direct Connection ◽  
Tooth Replacement ◽  
Living Bone ◽  
Natural Tooth

Osseointegration can be defined as a direct connection, both structural and functional, between living bone and the surface of an artificial implant. Indeed, the word comes from the Greek term for 'bone' and 'to make whole'. In dentistry, once dental implants are placed, the body will react with osseointegration, enabling the implants to become a permanent part of the jaw. There are many benefits to this type of implant, compared with traditional tooth replacement options, not least that dental implants mimic the strength and functionality of a natural tooth. Dr Shuhei Tsuchiya is a researcher based in the Division of Oral and Maxillofacial Surgery at Nagoya University, Japan, who is interested in a range of areas, including regenerative medicine and the extracellular matrix. One of his key preoccupations, though, is shedding light on osseointegration. He and his team are working to unravel the mysteries of the mechanism.

scholarly journals Robust and Accurate Mandible Segmentation on Dental CBCT Scans Affected by Metal Artifacts Using a Prior Shape Model

2021 ◽  
Vol 11 (5) ◽  
pp. 364
Author(s):  
Bingjiang Qiu ◽  
Hylke van der van der Wel ◽  
Joep Kraeima ◽  
Haye Hendrik Glas ◽  
Jiapan Guo ◽  
...  
Keyword(s):  
State Of The Art ◽  
Maxillofacial Surgery ◽  
Cone Beam ◽  
Oral And Maxillofacial Surgery ◽  
Metal Artifacts ◽  
Shape Model ◽  
High Attenuation ◽  
Mandible Shape ◽  
Prior Shape ◽  
Segmentation Models

Accurate mandible segmentation is significant in the field of maxillofacial surgery to guide clinical diagnosis and treatment and develop appropriate surgical plans. In particular, cone-beam computed tomography (CBCT) images with metal parts, such as those used in oral and maxillofacial surgery (OMFS), often have susceptibilities when metal artifacts are present such as weak and blurred boundaries caused by a high-attenuation material and a low radiation dose in image acquisition. To overcome this problem, this paper proposes a novel deep learning-based approach (SASeg) for automated mandible segmentation that perceives overall mandible anatomical knowledge. SASeg utilizes a prior shape feature extractor (PSFE) module based on a mean mandible shape, and recurrent connections maintain the continuity structure of the mandible. The effectiveness of the proposed network is substantiated on a dental CBCT dataset from orthodontic treatment containing 59 patients. The experiments show that the proposed SASeg can be easily used to improve the prediction accuracy in a dental CBCT dataset corrupted by metal artifacts. In addition, the experimental results on the PDDCA dataset demonstrate that, compared with the state-of-the-art mandible segmentation models, our proposed SASeg can achieve better segmentation performance.

STUDY OF INCIDENCE OF THE CORONAL APPROACH IN CRANIOFACIAL TRAUMA AND ADVANTAGEOUS OF TITANIUM MESH IN RECONSTRUCTION OF CRANIOFACIAL DEFECTS.

2021 ◽  
pp. 53-54
Author(s):  
Mastan Shaik
Keyword(s):  
Maxillofacial Surgery ◽  
Frontal Bone ◽  
Male Participant ◽  
Female Participant ◽  
Oral And Maxillofacial Surgery ◽  
Industrial Accidents ◽  
Nasal Bones ◽  
Aesthetic Results ◽  
One Year ◽  
Craniofacial Defects

INTRODUCTION: The coronal approach gives a broad exposure to the frontal bone, the calvaria, the nasal bones, the orbits, the subcondylar region, the zygoma and the zygomatic arch and gives ideal aesthetic results with less complication. The common craniofacial fractures are Nasal bones (45%), cranial bones (24%), Mandible (13%), Zygoma (13%), Orbital blowout (3%), Maxilla (2%). Common causes of fractures are Road trafc accident, Assault, Industrial accidents, Recreational accidents, Frontal bone fracture. METHOD: The study was carried out for a period of one year from March 2020 to March 2021. The study conducted in St Joseph dental college ELURU in the department of Oral and Maxillofacial Surgery. The age limit for this study was below 30 years. The number of subjects involved in this study was 5. Number of females was 3 and males were 2 in this study. RESULT: Number of female participants in this study was 3 and number of male participants was 2.Number of male participants with coronal incision were 1 and number of participants with pretrichial incision were 2.Out of 2 one for male participant and one for female participant. CONCLUSION: The coronal ap has recently become a preferred approach for access to the craniofacial skeleton and orbit. This method of exposure has become particularly useful with increased indications for rigid internal xation and primary bone grafting in the management of complex facial fractures.

scholarly journals Contamination of food with cadmium and dioxins – influence on the human body

2019 ◽  
Vol 65 (3) ◽  
Author(s):  
Aleksandra Słojewska ◽  
Izabela Gutowska
Keyword(s):  
General Population ◽  
Health Effects ◽  
Human Body ◽  
Bone Mineralization ◽  
The Body ◽  
Food Sources ◽  
Hormonal Balance ◽  
Small Doses ◽  
Contaminated Food

Introduction: Food is a carrier of many pollutants nowadays. For cadmium and dioxins, it is the main source of these compounds in the general population. Hence, the aim of this work was to collect data on the health effects associated with exposure to cadmium and dioxins which get into the human body through food.Materials and methods: A literature review was conducted by searching the scientific Medline database (PubMed) and Google Scholar.Results: Health effects associated with a long-term exposure to low doses of cadmium and dioxins may be nonspecific and are rarely attributed to food sources. These may cause disorders affecting hormonal balance, kidney function, lipid metabolism, fertility, cognitive function, bone mineralization, and susceptibility to diseases and allergies. These compounds may also lead to cancer development.Conclusions: The general population faces the problem of longterm exposure to small doses of these substances due to their accumulation in the body, even if their amounts do not exceed the relevant standards. The health effects of this type of exposure may be significantly delayed and are not likely to be attributed to the consumption of contaminated food. Consumers wishing to reduce the amounts of these compounds delivered to the body should limit the consumption of grilled and smoked products, and should also opt for organic food.

scholarly journals Primary Tuberculous Lymphadenitis: a Rare Case Report

2018 ◽  
Vol 22 (2) ◽  
pp. 106-110
Author(s):  
Mustafa Mert Açikgöz ◽  
Ayşem Yurtseven ◽  
Gülsüm Ak
Keyword(s):  
Case Report ◽  
Multidisciplinary Approach ◽  
Maxillofacial Surgery ◽  
Excisional Biopsy ◽  
Oral And Maxillofacial Surgery ◽  
Tuberculous Lymphadenitis ◽  
Rare Case Report ◽  
Long Term Follow Up

SummaryBackground/Aim: Our aim is to describe multidisciplinary approach to primary tuberculous lymphadenitis with a case report.Case Report: A 6-year-old boy was referred to İstanbul University, Faculty of Dentistry, Department of Oral and Maxillofacial Surgery with the symptoms of painless extra-oral abscess and lymphadenopathy. The diagnosis of primary tuberculous lymphadenitis was proved by microbiological culture and ultrasound imaging.Conclusions: Combine tuberculosis treatment should be applied and long term follow up is necessary. Excisional biopsy for tissue diagnosis and bacterial examination with culture should be performed for an early diagnosis as a delay in treatment can lead to devastating consequences.

Rational vitamin therapy

1982 ◽  
Vol 63 (1) ◽  
pp. 58-61
Author(s):  
I. M. Raskin ◽  
J. S. Zimmerman
Keyword(s):  
Adverse Effect ◽  
High Activity ◽  
Human Body ◽  
Complex Interaction ◽  
The Body ◽  
Scientific Development ◽  
Functional Connections ◽  
Vitamin Therapy ◽  
Excessive Intake

Free sale of vitamin preparations with high activity, insufficient scientific development of the consequences of excessive intake of vitamins, the spread of superficial knowledge about vitamins among the population have led to numerous facts of the adverse effect of certain vitamins on the human body. It turned out that unjustifiably long-term intake of large doses of one of the vitamins can cause a deficiency in the body of another vitamin, cause the development of hypovitaminosis. The complex interaction of vitamins in the human body is due to the presence, they have metabolic and functional connections.

The Research Progress of Heavy Metals in PM2.5

2014 ◽  
Vol 955-959 ◽  
pp. 1397-1404 ◽  
Author(s):  
Li Na Shi ◽  
Xun Xu ◽  
Xiao Yan Dou ◽  
Xu Dong Zhao
Keyword(s):  
Heavy Metals ◽  
Air Pollution ◽  
Human Health ◽  
Human Body ◽  
Chemical Form ◽  
The Body ◽  
Detection Methods ◽  
Research Progress ◽  
Depth Study

PM2.5 is one of the most important components in air pollution. It is also the focus of the most closely watched at home and abroad. Based on its small size, complex components, and strongenvironmental activity, it can be used as a carrier for chemicals, heavy metals, bacteria, toxins and carcinogens into the body. Then, as a result, it will affect Human Body Health. Heavy metals are important components of PM2.5, and the long-term accumulation of heavy metals in PM2.5 poses a great threat on human health and the environment. This paper reviewed the sources, distribution methods,chemical form, detection methods, disposal way, research progress of heavy metals in PM2.5. As a result, it provided a reference for in-depth study on the future.

scholarly journals Local Hemostatic Measures in Oral and Maxillofacial Surgery

2019 ◽  
Vol 3 (2) ◽  
Keyword(s):  
Platelet Aggregation ◽  
Continuous Process ◽  
Maxillofacial Surgery ◽  
Blood Gases ◽  
The Body ◽  
Oral And Maxillofacial Surgery ◽  
Hormone Signaling ◽  
Signaling System ◽  
Metabolic Products ◽  
Internal Body

Homeostasis is continuous process by which internal body system monitor and maintain constant internal environment. Blood is a connective tissue in fluid state closely connected to all tissues of the body. It has many roles including transport of nutrients, metabolic products, blood gases, thermal regulation hormone signaling system, heat conduction, immune response. Hemostasis is homeostasis of intravascular blood volume and is an important function of blood. It involves four major steps: vasoconstriction, platelet aggregation, coagulation and fibrinolysis [1]. The phase of vasoconstriction reduces the blood flow in preparation for platelet aggregation phase. However, the larger the size of the injured blood vessel the less possibility of vasoconstriction especially with high pressure.

scholarly journals The Role of Chemical Agents in the Microbial Flora with Major Risk of Interventios in Maxilo-facial Surgery

2019 ◽  
Vol 70 (6) ◽  
pp. 1988-1991
Author(s):  
Carmen Gabriela Stelea ◽  
Iulian Constantin ◽  
Cristian Budacu ◽  
Alexandra Lorina Platon ◽  
Mihail Balan ◽  
...  
Keyword(s):  
Oral Surgery ◽  
Maxillofacial Surgery ◽  
The Body ◽  
Small Scale ◽  
Oral And Maxillofacial Surgery ◽  
Periodontal Surgery ◽  
Facial Surgery ◽  
Chemical Agents ◽  
Infectious Etiology

The pathology of the oro-maxilo-facial territory comprises a vast chapter of diseases with primary or secondary infectious etiology, the mouth being the natural cavity of the organism with the most varied and variable flora of bacterial contamination. By the continuity solutions created by the mechanical act of mastication, decubitus of defective prosthetic works, local dento-periodontal infectious processes, but especially of dental or small-scale interventions, open gates and possibilities of penetration into the blood circulation of the microorganisms, which cause the transient bacteria. The study included 243 randomly selected patients, with the address of the Oral and Maxillofacial Surgery Clinic in the period 2016-2018. The inoculation of microorganisms in the oral cavity in circulating blood as a result of oral surgery or dental care procedures is much more common than in other areas of the body. Aggressive dental maneuvers that create solutions of continuity of oral mucosa, gingiva, periodontal surgery, periodontal surgery techniques can cause bacteria.

Prevalence and pattern of oral and maxillofacial trauma in Chhattisgarh- A retrospective study

2021 ◽  
Vol 7 (3) ◽  
pp. 131-134
Author(s):  
Sushmita Batra ◽  
Surabhi Singhai ◽  
Pramod Krishna B ◽  
Rajdeep Singh ◽  
Sushant Soni
Keyword(s):  
Maxillofacial Surgery ◽  
The Body ◽  
Maxillofacial Trauma ◽  
Treatment Modalities ◽  
Oral And Maxillofacial Surgery ◽  
Mandibular Fractures ◽  
High Morbidity ◽  
Maxillofacial Injuries ◽  
Facial Region ◽  
Clinical Records

Maxillofacial trauma is any physical trauma to the facial region, commonly encountered by maxillofacial surgeons, and is often associated with high morbidity and so constitute quite a significant portion of the workload of the oral and maxillofacial surgeon. Maxillofacial injuries can occur as an isolated injury or may be associated with multiple injuries in other parts of the body. To assess the patterns, etiology, and treatment modalities of maxillofacial trauma in a teaching hospital in central India, over a 12-year period. Patients with maxillofacial trauma were identified using the department database and clinical records. 264 patients were identified with maxillofacial trauma in the department of oral and maxillofacial surgery between January 2006 and December 2018. The study showed that there was a male preponderance in all age groups over female. Of the 264 patients with maxillofacial injuries, 83,33% had isolated lower face (mandibular) fractures, followed by midface fractures (10.60%) and panfacial fractures (6.06%). Road traffic accidents (87.12%) were the most common form of etiology for trauma followed by assaults (10.98%). Most trauma were treated with open reduction internal fixation (89%) than closed reduction (11%). The etiology and pattern of maxillofacial injuries reflect the trauma patterns within the community and can thus provide a guide to help design programs toward prevention and treatment.

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