Incidence of decompression sickness in hypobaric hypoxia training.

Simulated flight in a hypobaric chamber is a fundamental component in the physiological training of aviators. Although rare, there is always a risk of decompression sickness (DCS) in trainees during hypobaric hypoxia training. In this study we aimed to determine the incidence of altitude-induced DCS and the symptoms manifested in trainees and inside chamber observers (ICOs) during the training sessions.

Survey on the surgical skills of orthopedics and traumatology residents from accredited and nonaccredited institutions in İstanbul.

Objective: To investigate whether orthopedic and traumatology residents who are undergoing training achieve competence in surgical techniques after completion of their specialization and to determine whether there are significant differences between the responses of residents from accredited and nonaccredited institutions.

Methods: A total of 131 orthopedics and traumatology residents from nine institutions in the İstanbul province answered the questionnaire during the morning training meeting. In addition to basic demographic data, level of seniority, equipment competence, and theoretical and practical training, the residents were asked about their opinion on what type of surgeries they could perform after their specialization, considering the surgery and follow-up of the case as well as the complications occurring during this period.

A promising independent prognostic biomarker in colorectal cancer: P2X7 receptor.

The P2X7 receptor (P2X7R) is an exclusive member of the purinergic receptor family that plays a key role in tumor progression, including colorectal cancer (CRC). P2X7R supports the tumor cells to resist unfavorable conditions by stimulating GLUT-1 expression. GLUT1 is the major glucose transporter in CRC cells and is indicated to be a poor prognostic indicator in patients with CRC.

Peripheral and central vestibular system findings in Meniere's disease.

Aim: Meniere's Disease (MD) is a chronic disease that is characterized by intermittent episodes of tinnitus, vertigo, and progressivefluctuating sensorineural hearing loss together with aural fullness. The aim of this study is to evaluate Meniere's disease patients with vestibular test battery as Videonystagmography (VNG), Vestibular Evoked Myogenic Potentials (VEMPs) and Video Head Impulse Test (V-HIT) to assess peripheral and central vestibular systems.

Methods: 16 bilateral, 17 unilateral patients suffering from MD (mean age, 40.

In vitro antimicrobial activity of different electrochemically-activated solutions on enterococcus faecalis.

Purpose: The aim of this in vitro study was to assess and compare the antimicrobial efficacy of different electrochemically-activated solutions (ECA) and contemporary irrigants, in root canals infected with Enterococcus faecalis, used with or without EndoActivator (EA).

Materials And Methods: A hundred single-rooted human teeth were prepared. Ninety of the root segments were infected with E.

In vitro antibacterial activity of self-etch bio-active dental adhesives after artificial aging.

Purpose: The aims to evaluate the antibacterial effect of different bioactive component containing dental adhesives before and after artificial aging.

Materials And Methods: Two bio-active adhesives; Clearfil Protect Bond and FL Bond II, two non-bioactive adhesives, Clearfil SE Bond and Clearfil S3 Bond were used for this study. Antibacterial activities of the fresh and aged samples against Streptococcus mutans were investigated with Direct Contact Test.

Comparison of newly formed microcracks after instrumentation using protaper next, reciproc and self-adjusting file systems.

Purpose: The purpose of the present study is to assess the rate of newly formed microcracks comparatively during root canal instrumentation by using ProTaper Next, Reciproc, and Self-Adjusting File systems using micro-computed tomography.

Subjects And Methods: Thirty mesial roots of mandibular molars were randomly assigned to 3 experimental groups (n = 10) as follows, ProTaper Next, Reciproc and Self-Adjusting File system. Preoperative and postoperative scans were obtained at the isotropic resolution of 13.

Evaluation of maxillary sinus expansion in children due to maxillary first molar extraction.

Purpose: This study is aimed at understanding the effects of maxillary first molar extraction on the expansion of maxillary sinus in children.

Subjects And Methods: 119 patients (aged 11-17 years) who had only one extracted maxillary first molar were included in the study. The superoinferior differences of the sinus floor position were measured in both dentate and edentulous sites on panoramic radiographs.

Reduced colonic mucin degradation in breastfed infants colonized by subsp EVC001.

Mucin glycoproteins play an important role in protecting the gut epithelium by keeping gut microbes from direct contact with the gut epithelium while allowing for diffusion of small molecules from the lumen to the epithelium. The mucin glycocalyx can be degraded by gut bacteria such as and , but other bacteria, such as subsp, cannot consume mucin glycans. Untargeted mass spectrometry profiles were compared to microbiome profiles to assess how different gut microbiomes affect colonic mucin degradation.

Evaluation of the optic nerve and scleral-choroidal-retinal layer with ultrasound elastography in glaucoma and physiological optic nerve head cupping.

Aim: To evaluate the strain ratio of the optic nerve and retina-choroid-sclera (RCS) layers in individuals with physiological optic disc cupping (PC) and glaucoma patients using strain elastography.

Material And Methods: We evaluated 56 eyes of 56 subjects (20 eyes with glaucoma, 19 eyes with PC, and 17 normal eyes). The strain ratio of orbital fat to optic nerve (SROFON) was calculated as the ratio of the optic nerve to intraconal fat tissue and the strain ratio of orbital fat to retina-choroid-sclera (SROFRCS) was calculated as the ratio of RCS layers to intraconal fat tissue.

Scientific basis of dentistry.

Technological and scientific innovations have increased exponentially over the past years in the dentistry profession. In this article, these developments are evaluated both in terms of clinical practice and their place in the educational program. The effect of the biologic and digital revolutions on dental education and daily clinical practice are also reviewed.

Eye-related trauma and infection in dentistry.

Despite numerous technological and medical developments achieved in recent years, a significant amount of occupational health problems still exist in modern dentistry. The risk of eye injury is mostly attributed to the use of high-speed hand pieces and ultrasonic devices. A dental clinic may be the source of eye-related infection and injury because of mechanical, chemical, microbiological and electromagnetic irritants.

Maxillary first premolars with three root canals: two case reports.

It is very important that the dentists have sufficient information about possible variations in the expected root canal configurations in order to achieve success in endodontic treatment. In addition to having adequate knowledge on the variations of the root canal anatomy, periapical radiographs from different angles, careful examination of the pulp chamber floor, and use of dental operation microscope during the procedure are also important factors that contribute to the diagnosis of the additional roots and canals. The aims of this article are to present the diagnostic approach and root canal treatments of two maxillary first premolar teeth with three canals in two patients.

Sectional mandibular complete denture for a total maxillectomy patient with trismus: a clinical report.

This report presents the case of a 60-year-old male patient with trismus induced by radiotherapy and fabrication of a sectional mandibular complete denture to allow the insertion of the denture into the mouth. A mandibular sectional denture was designed in two pieces with a locking mechanism by using mini anchor and ball abutment housing with cap. Patients who have undergone maxillectomy often have constricted mouth openings, as a result of surgical intervention and radiotherapy, and complain of an inability to insert or remove dentures.

Does intravenous tranexamic acid reduce blood loss during surgically assisted rapid palatal expansion?

Purpose: The purpose of this study was to evaluate the efficacy of tranexamic acid (TXA) in reducing blood loss during surgically assisted rapid palatal expansion (SARPE) procedure.

Subjects And Methods: A total of 34 patients (12 male, 22 female) who had been treated surgically under general anesthesia with SARPE including pterygoid disjunction for transverse maxillary deficiency (TMD) were included in this study. The study group (n=17) received intravenous (IV) TXA 10 mg/kg as a preoperative bolus; the control group (n=17) received normal saline solution.

Adhesive system affects repair bond strength of resin composite.

Purpose: This study evaluated the effects of different adhesive systems on repair bond strength of aged resin composites.

Materials And Methods: Ninety composite discs were built and half of them were subjected to thermal aging. Aged and non-aged specimens were repaired with resin composite using three different adhesive systems; a two-step self-etch adhesive, a two-step total-etch adhesive and a one-step self-etch adhesive; then they were subjected to shear forces.

Investigation of impacted supernumerary teeth: a cone beam computed tomograph (cbct) study.

Purpose: The purpose of this study was to investigate the impacted supernumerary teeth which were initially detected on panoramic radiographs by using cone beam computed tomography (CBCT).

Materials And Methods: In this retrospective study, supernumerary teeth diagnosed on panoramic radiographs taken from patients who had admitted for routine dental treatment were evaluated using CBCT. Patients' age, gender, systemic conditions as well as number of supernumerary teeth, unilateral-bilateral presence, anatomical localization (maxilla, mandible, anterior-premolar-molar, mesiodens-lateral-canine, parapremolar-paramolar-distomolar) shape (rudimentary, supplemental, tuberculate, odontoma), position (palatal-lingual-buccal-labial-central), shortest distance between the tooth and adjacent cortical plate, complications and treatment were assessed.

Relationships between initial probing depth and changes in the clinical parameters following non-surgical periodontal treatment in chronic periodontitis.

Purpose: The aim of this study was to evaluate the relationship between initial probing depth (IPD) and changes in clinical parameters following non-surgical periodontal treatment (NPT) in chronic periodontitis patients.

Subjects And Methods: A total of 1672 periodontal pockets having 3mm≤IPD≤9mm of depth in 15 chronic periodontitis patients were included. NPT consisting of oral hygiene instructions, scaling and root planing was applied in two sessions.

The effects of maxillary expansion on the soft tissue facial profile.

Purpose: The aims of this retrospective study were to evaluate the possible changes in soft tissue facial profile induced by orthopedic rapid maxillary expansion (RME) and surgically assisted rapid maxillary expansion (SARME), and to correlate them with the underlying hard tissue alterations.

Materials And Methods: 16 patients who received bone borne SARME and 25 patients who were subjected to RME using metal cast splint hyrax appliance were analyzed retrospectively. This research was conducted on lateral cephalometric radiographs taken on 2 occasions: before expansion (T1) and at the beginning of any further orthodontic treatment (T2).

Dental findings in marfan syndrome: a case report.

Marfan syndrome is an autosomal dominant disorder of connective tissue primarily characterized with anomalies affecting the musculoskeletal system, the cardiovascular system and the eyes. It has been suggested that early diagnosis of the syndrome is important, because of the risk of infective endocarditis. A 7-year-old female was referred to our clinic, with a chief complaint of dental crowding in the anterior region of mandible.

Treatment approaches for traumatized anterior teeth with excessive tissue loss: three case reports.

Use of direct composite and indirect laminate veneers has been an alternative to metal- and all-ceramic crowns for anterior teeth restorations. Dental traumas are the most common reasons for excessive tissue loss. Treatment options depend on the amount of remaining tissue, the extent of the damage to dental pulp and periapical tissues and the time elapsed before dental treatment.

Cavernous lymphangioma of the tongue in an adult: a case report.

Lymphangioma is a benign hamartomatous lesion caused by congenital malformation of the lymphatic system. This benign tumor is detected most commonly at birth or in early childhood but rarely in adults. On clinical examination, most lymphangiomas contain clear lymph fluid, but some may present as transparent vesicles containing red blood cells due to hemorrhage.

Dental management and orofacial manifestations of a patient with Robinow Syndrome.

Robinow syndrome (RS) is an extremely rare condition. Characteristic craniofacial findings of RS include a fetal facial appearance, ear abnormalities and oral findings. The aim of this case report was to evaluate the oral findings of a 26-year-old man with RS and to describe the dental treatments performed.

In vitro comparison of gutta-percha-filled area percentages in root canals instrumented and obturated with different techniques.

Purpose: To evaluate the efficacy of different obturation techniques in root canals instrumented either by hand or rotary instruments with regard to the percentage of gutta- percha-filled area (PGFA).

Materials And Methods: One hundred and sixty extracted mandibular premolars with single, straight root canals were studied. Root canals were prepared to an apical size of 30 by hand with a modified crown-down technique or the ProTaper and HEROShaper systems.

Evaluation of styloid process morphology and calcification types in both genders with different ages and dental status.

Purpose: The purpose of this study was to investigate the morphology and calcification pattern of the styloid process (SP) and to determine their relations with subjects' age, gender, and dental status.

Materials And Methods: 910 panoramic radiographs were stratified by age, dental status and gender. The distance between the points where SP leaves the tympanic plate of the temporal bone and the bony tip of SP was measured.