Simulation of an Orthodontic System Using the Lingual Technique Based on the Finite Element Method.

The finite element method (FEM) is an advanced numerical technique that can be applied in orthodontics to study tooth movements, stresses, and deformations that occur during orthodontic treatment. It is also useful for simulating and visualizing the biomechanical behavior of teeth, tissues, and orthodontic appliances in various clinical scenarios. The objective of this research was to analyze the mechanical behavior of teeth, tissues, and orthodontic appliances in various clinical scenarios.

Orthodontic System Modeled and Simulated with the Lingual Technique to Assess Tooth Forces.

CBCT (cone beam computed tomography) is an imaging investigation that provides three-dimensional (3D) images of craniofacial structures. The purpose of this study is to determine the mechanical behavior of an orthodontic system where the lingual treatment technique was used in a 25-year-old female patient from whom a set of CBCT scans was used. CBCT images were processed through software programs such as Invesalius, Geomagic, and Solid Works, to create models containing virtual solids.

Metabolic and Other Endocrine Elements with Regard to Lifestyle Choices: Focus on E-Cigarettes.

Our objective was to overview recent data on metabolic/endocrine disorders with respect to e-cigarette (e-cig) use. This is a narrative review; we researched English, full-length, original articles on PubMed (between January 2020 and August 2023) by using different keywords in the area of metabolic/endocrine issues. We only included original clinical studies (n = 22) and excluded case reports and experimental studies.

Using the Finite Element Method to Determine the Odonto-Periodontal Stress for a Patient with Angle Class II Division 1 Malocclusion.

The finite element method (FEM) is a computational method that can solve all biomechanical problems, including the field of orthodontics. The purpose of this virtual experimental study is to determine the behavior of a real orthodontic system subjected to different systems of loads. To analyze the real orthodontic system, we studied the case of a 21-year-old female patient.

Materials for ossicular chain reconstruction: History and evolution (Review).

The middle ear represents the anatomic space between the external auditory canal and the inner ear (Cochlea). It is comprised of the tympanic membrane, the ossicular chain [malleus (hammer), incus (anvil) and stapes (stirrup)] with the corresponding muscles and ligaments and the cavity of the middle ear. The main function of the middle ear is to convey vibratory energy (sound pressure) from the air to the cochlear fluids of the internal ear via the ossicular chain.

Clinical, histopathological and immunohistochemical changes of the superficial marginal periodontium caused by orthodontic treatment with fixed metallic orthodontic appliances.

Malocclusions negatively influence dental function, physical well-being, and quality of life. According to data provided by the World Health Organization (WHO), malocclusions represent the third most widespread oral health problem, after dental caries and periodontal diseases. In recent years, more and more people call for orthodontic treatment with fixed braces that aim at establishing a dental, aesthetic, and functional balance, compatible with a normal life.

Approach of Acromegaly during Pregnancy.

Acromegaly-related sub/infertility, tidily related to suboptimal disease control (1/2 of cases), correlates with hyperprolactinemia (1/3 of patients), hypogonadotropic hypogonadism—mostly affecting the pituitary axis in hypopituitarism (10−80%), and negative effects of glucose profile (GP) anomalies (10−70%); thus, pregnancy is an exceptional event. Placental GH (Growth Hormone) increases from weeks 5−15 with a peak at week 37, stimulating liver IGF1 and inhibiting pituitary GH secreted by normal hypophysis, not by somatotropinoma. However, estrogens induce a GH resistance status, protecting the fetus form GH excess; thus a full-term, healthy pregnancy may be possible.

Approach of Heterogeneous Spectrum Involving 3beta-Hydroxysteroid Dehydrogenase 2 Deficiency.

We aim to review data on 3beta-hydroxysteroid dehydrogenase type II (3βHSD2) deficiency. We identified 30 studies within the last decade on PubMed: 1 longitudinal study (N = 14), 2 cross-sectional studies, 1 retrospective study (N = 16), and 26 case reports (total: 98 individuals). Regarding geographic area: Algeria (N = 14), Turkey (N = 31), China (2 case reports), Morocco (2 sisters), Anatolia (6 cases), and Italy (N = 1).

Post Placement and Restoration of Endodontically Treated Canines: A Finite Element Analysis Study.

The purpose of this study was to show the improved outcomes of restoring endodontically treated teeth with fiberglass posts compared to restorations using metal posts. In our study, we used the Finite Element Method (FEM), which is based on the principle that a physical model that supports a given load distributes the stress throughout its volume. We sought to assess what stress results in a tooth when it is restored using a fiberglass post compared to restoration using a metal post.

Modeling and Simulating an Orthodontic System Using Virtual Methods.

Cone beam computed tomography (CBCT) is a modern imaging technique that uses X-rays to investigate the structures of the dento-maxillary apparatus and obtain detailed images of those structures. The aim of this study was to determine a functional mathematical model able to evaluate the elastic force intensity on each bracket and tube type element and the ways in which those components act on the orthodontic system being used. To analyze a real orthodontic system, we studied the case of a 13-year-old female patient.

Diabetes mellitus: Plasticizers and nanomaterials acting as endocrine-disrupting chemicals (Review).

Various plasticizers and nanomaterials have been linked to endocrine disruptors or endocrine-disrupting chemicals (EDCs) which represent a large, heterogeneous, yet incompletely understood group of structures acting on normal and pathological body pathways such as hormonal production, secretion, transport and receptor binding. By contrast, various applications of nanoparticles are currently under investigation since the delivery of useful drugs, particularly insulin in diabetes mellitus, is essential in case of insulin deficiency. The aim of the present review was to introduce and examine different plasticizers and nanomaterials with potential applications for diabetic patients (such as selenium or gold-based nanoparticles that help the oral delivery of insulin) or plasticizers/nanomaterials acting similarly to EDCs in relation to the human and animal body, particularly glucose metabolism impairment such as diabetes mellitus (DM).

Correlations between periodontal indices and osteoporosis.

In the pathogenesis of chronic periodontitis, there are general systemic factors which play a major role, such as osteoporosis, with menopause as the most common etiological factor, and other pathological determining conditions for osteoporosis as well (ovary, thyroid and malignant tumors). The aim of the present study was to assess the correlations between periodontal indices and osteoporosis. The study was performed on 35 patients with periodontal disease aged between 45 and 79 years.

Histological and immunohistochemical study on the dental pulp of patients with diabetes mellitus.

Diabetes mellitus is a disease that brings numerous alterations in the human body, mainly on the blood vessels and nervous system, its complications being difficult to treat most of the time. Oral complications are largely known and studied. Changes that occur in the dental pulp are of importance for the dentists, considering regular procedures outcome.

An evaluation of a collagen-based material osseointegration.

The aim of this study is to evaluate the osseointegration of a collagen-based material Alveoprotect, suitable for socket preservations, while preserving the vestibular bone lamella. This material is intended to be used in the field of implantology for smaller bone defects. Thus, 3-mm diameter experimental cavities were carried out on the calvaria and maxilla of 18 laboratory Wistar rats.

The prevalence of crown injuries to frontal teeth at schoolchildren aged 6 to 14 and their effects on the periodontal tissue.

The research aims at emphasizing the interrelation between the social impact and the self-esteem of schoolchildren with dental crown fractures in the frontal group. Dental traumatic injuries are frequently met to schoolchildren, therefore, the prevention and interception of traumatic pathology within parents, teachers and children is more than necessary. Our statistical study intends to determine the prevalence of dental trauma to southwestern Romanian schoolchildren aged 6 to 14.

Immunohistochemical study of the epithelial and stromal components of Warthin's tumor.

Warthin's tumor is a benign monomorphic adenoma with unclear origin with the highest incidence in the sixth and seventh decades. The analysis of tumor markers involved in the pathogenesis of Warthin's tumor can improve the patients' prognosis. This study included 29 cases of Warthin's tumor, which were histopathologically and immunohistochemically examined for different compartments of tumors.

Dental Anxiety and its Association with Behavioral Factors in Children.

Background: Dental anxiety is a condition that causes a decrease in population addressability to the dentist with adverse consequences for long-term oral health. Assessment of behavioral factors that correlate with dental anxiety is important for accurate evaluation of dental fear. Its diagnosis in childhood is important for establishing therapeutic management strategies to reduce anxiety and promote oral health.

A rare case of osteoma in the frontal sinus: anatomical and histological description.

Purpose: The purpose of this paper is to present a rare case of osteoma localized in the left frontal sinus. A 22-year-old woman who arrived at the Department of Neurosurgery of the University Emergency Hospital, Bucharest, Romania, presented a vertical asymmetry of the eyeballs but displayed no clinical signs like pain or diplopia. The computer tomography exam was used for preoperatory diagnostic.

Cranial sutures and diploae morphology.

The aim of the study was to assess the normal cranial suture and bone diploae ultrastructural morphology. Two types of sutures from different specimens were collected. The micro-CT scanning provided a three-dimensional view of the sutures at a microscopic level thus allowing the evaluation of the development stage and a rapid analysis evaluation of bone and diploae morphology.

Indirect pulp capping in young patients: immunohistological study of pulp-dentin complex.

Indirect capping is a complex therapy exclusively needed in deep cavities that provides, using biomaterials, a disinfection of the dentinary sore and seals the dentinary tubules, protects the pulp of physical mechanisms and chemical agents and stimulates the mechanisms that produce new dentin. Following this idea, we studied the histological changes in the dental pulp tissue and also the specific immunohistochemical response in various structures when an indirect capping technique was used. We used special histological techniques followed by classical staining or by immunohistochemical reaction in order to assess the odontoblastic, and the vascular reaction.

Modifications of the marginal paradentium to a case of Angle Class III/1 malocclusion.

Angle Class III malocclusions are not so frequently met but they raise big problems of treatment. The analyzed case represents a 14-year-old patient that came to the dental consulting room with an Angle Class III malocclusion determined by the excess of the somatotropic pituitary hormone and a gingival hyperplasia more emphasized at the level of inferior frontal teeth. The patient followed a fixed appliance treatment, the straight-wire technique.