Fracture resistance of roots filled with three different obturation techniques

Objectives: The aim of this study was to compare in vitro root fracture resistance following root canal filling with AH 26 using lateral condensation, BeeFill, and Thermafil techniques. Study Design: Eighty extracted human mandibular premolars with similar dimensions were selected. In order to standardize the roots, measurements were taken in two separate regions of the teeth?at the cemento-enamel junction and 8 mm apically from the junction?buccolingual as well as mesiodistal for every tooth. Teeth were then randomly divided into five groups (n=16). With the exception of the non-prepared group (Group 1), instrumentation was done in all groups. In group 2, instrumentation but no filling was performed; in group 3, the obturation was done with AH 26 + gutta-percha; in group 4, with AH 26 + BeeFill and in group 5, AH 26 + a Thermafil obturator was used. All the roots were mounted vertically in copper rings and filled with acrylic resin, exposing 8 mm of the coronal part. A universal testing machine was used for the strength test. Results: The results were analyzed using the one-way ANOVA test. The significance between the groups was tested with Temhane?s T2 test. The results indicate that instrumentation of root canals had a significant effect on fracture resistance (p0.05). Conclusions: The results suggest that instrumentation of root canals significantly weakens the tooth structure to fracture and the root canal obturation techniques that are used are not able to form reinforcement

One-year prevalence and the impact of migraine and tension-type headache in Turkey: a nationwide home-based study in adults

Several studies have shown that the prevalence of migraine and tension-type headache (TTH) varied between different geographical regions. Therefore, there is a need of a nationwide prevalence study for headache in our country, located between Asia and Europe. This nationwide study was designed to estimate the 1-year prevalence of migraine and TTH and analyse the clinical features, the impact as well as the demographic and socio-economic characteristics of the participant households in Turkey. We planned to investigate 6,000 representative households in 21 cities of Turkey; and a total of 5,323 households (response rate of 89%) aged between 18 and 65 years were examined for headache by 33 trained physicians at home on the basis of the diagnostic criteria of the second edition of the International Classification of Headache Disorders (ICHD-II). The electronically registered questionnaire was based on the headache features, the associated symptoms, demographic and socio-economic situation and history. Of 5,323 participants (48.8% women; mean age 35.9 ± 12 years) 44.6% reported recurrent headaches during the last 1 year and 871 were diagnosed with migraine at a prevalence rate of 16.4% (8.5% in men and 24.6% in women), whereas only 270 were diagnosed with TTH at a prevalence rate of 5.1% (5.7% in men and 4.5% in women). The 1-year prevalence of probable migraine was 12.4% and probable TTH was 9.5% additionally. The rate of migraine with aura among migraineurs was 21.5%. The prevalence of migraine was highest among 35–40-year-old women while there were no differences in age groups among men and in TTH overall. More than 2/3 of migraineurs had ever consulted a physician whereas only 1/3 of patients with TTH had ever consulted a physician. For women, the migraine prevalence was higher among the ones with a lower income, while among men, it did not show any change by income. Migraine prevalence was lower in those with a lower educational status compared to those with a high educational status. Chronic daily headache was present in 3.3% and the prevalence of medication overuse headache was 2.1% in our population. There was an important impact of migraine with a monthly frequency of 5.9 ± 6, and an attack duration of 35.1 ± 72 h, but only 4.9% were on prophylactic treatment. The one-year prevalence of migraine estimated as 16.4% was similar or even higher than world-wide reported migraine prevalence figures and identical to a previous nation-wide study conducted in 1998, whereas the TTH prevalence was much lower using the same methodology with the ICHD-II criteria

Scholars Journal of Medical Case Reports ISSN 2347-9507 (Print) The Efficacy of Spinal Ganglion Blockade in a Patient with Peripheral Circulation Dysfunction: A Case of Scleroderma

Abstract: Scleroderma is a connective tissue disease characterized by the deposition of collagen in the skin, internal organs, and arteries and also by microvascular obstruction. Sympathetic ganglion blockade (cervicothoracic and lumbar sympathetic) is one treatment modality used in this population for circulation failure of the lower limbs, severe pain, gangrene, intermittent claudication, hyperhydrosis, sympathetic hyperactivity, and problematic peripheral circulation. In this case report, we aimed to discuss the efficiency of spinal ganglion blockade in a 30-year-old female patient with digital ulceration, pain, and circulation disorder caused by scleroderma

SPİNAL ANESTEZİ SONRASI GELİŞEN NÖROPATİK AĞRI: OLGU SUNUMU EŞLİĞİNDE LİTERATÜRÜN GÖZDEN GEÇİRİLMESİ

Spinal anesthesia provides sensorial and motor blockage with administration of small amounts of local anesthetics to the subarachnoid space; this technique is commonly used. Some complications may occur, depending on the method of spinal anesthesia and anesthetic agents. One of the most common neurological complications is radiculopathy caused by intrathecal anesthesia. In this case report, we aimed to present the therapeutic approach of a patient with low back pain, including neuropathic components, after spinal anesthesi

Bayesian network based decision support for predicting and mitigating delay risk in TBM tunnel projects

© 2018Tunnel projects involve high levels of uncertainty stemming from the vagueness of geological conditions and the complexity of the mechanized tunnel boring process. Delay risk assessment is carried out by project managers to identify critical risk factors leading to time and cost overruns and formulate strategies to meet the project targets under different scenarios. In this study, a Bayesian Belief Network (BBN) based risk assessment method was developed for Tunnel Boring Machine (TBM) tunnel projects to predict delay. Based on the BBN model, a decision-support tool, BBN Tunnel, was developed to assess delay considering the impacts of implementing alternative risk mitigation strategies. The tool developed in collaboration with a company was utilized in a tunnel project to test its usability in practice. The results demonstrated that BBN Tunnel and risk assessment method could be used to model interrelations between risk factors, construct a risk network, predict delay and help decision-makers formulate cost-effective risk mitigation strategies

Experimental and numerical investigation of flow field and heat transfer from electronic components in a rectangular channel with an impinging jet

Thermal control of electronic components is a continuously emerging problem as power loads keep increasing. The present study is mainly focused on experimental and numerical investigation of impinging jet cooling of 18 (3 × 6 array) flash mounted electronic components under a constant heat flux condition inside a rectangular channel in which air, following impingement, is forced to exit in a single direction along the channel formed by the jet orifice plate and impingement plate. Copper blocks represent heat dissipating electronic components. Inlet flow velocities to the channel were measured by using a Laser Doppler Anemometer (LDA) system. Flow field observations were performed using a Particle Image Velocimetry (PIV) and thermocouples were used for temperature measurements. Experiments and simulations were conducted for Re = 4000 – 8000 at fixed value of H = 10 × Dh. Flow field results were presented and heat transfer results were interpreted using the flow measurement observations. Numerical results were validated with experimental data and it was observed that the results are in agreement with the experiments

Acute peripancreatic fluid collection in acute pancreatitis: Incidence, outcome, and association with inflammatory markers

Background: The hospital outcomes and predictors of acute peripancreatic fluid collection (APFC) have not been well-characterized. In this study, we aimed to investigate the clinical outcomes of APFC in patients with acute pancreatitis (AP) and the role of the systemic immune-inflammation index (SII), systemic inflammation response index (SIRI), and C-reactive protein (CRP) level in predicting the occurrence of APFC. Methods: In this retrospective study, the complicated group (patients with APFC) and the uncomplicated group (patients without APFC) were compared for their clinical characteristics, hospital outcomes (mortality rate, intensive care unit admission rate, and length of hospital stay), pseudocyst formation, CRP levels, SII, and SIRI on admission and at 48 hours. Results: Of 132 patients with AP, 51 (38.6%) had APFC and eight (6.1%) had pancreatic pseudocysts. Of 51 patients with APFC, 15.7% had pancreatic pseudocysts. Pseudocyst did not develop in the uncomplicated group. SII value at 48 h [median 859 (541–1740) x 109/L vs. 610 (343–1259) x 109/L, P = 0.01] and CRP level at 48 h [89 (40–237) mg/L vs. 38 (12–122) mg/L, P = 0.01] were higher in the complicated group than in the uncomplicated group. The length of hospital stay was longer in the complicated group, compared with the uncomplicated group [median 8 days (5–15), vs. 4 days (3–7), P < 0.001, respectively]. No significant difference was detected between the two study groups' mortality rates and intensive care unit admission rates. Conclusions: While 38.6% of the AP patients had APFC, 6.1% of all patients and 15.7% of the patients with APFC had pancreatic pseudocysts. APFC was found to lengthen the hospital stay and to be associated with the SII value and CRP level measured at 48 h

A seven-toed central polydactyl in an adult: A neglected, unclassifiable case

The aim of this study was to present a neglected, unclassifiable case that involved a central type polydactyl adult with 7 toes and metatarsals, 4 cuneiforms and 1 cuboid. A 22 year-old male soldier with a right polydactyl was referred to our hospital. He suffered from the need of excessively wide-shoes and occasional shoe irritation. He was evaluated with plain radiography and 3D tomography. The patient had central-type polydactyl with 7 toes and metatarsals, and 4 cuneiforms and 1 cuboid. Ankles and hind feet were completely normal. All toes were capable of tendon flexion and extension. His medical and family history was unremarkable. We planned to excise the excessive toes and metatarsals, but the patient denied the surgery. We present a very rare case with a central polydactyl having 7 toes and metatarsals, 4 cuneiforms and 1 cuboid. The striking point in our case was that he was a neglected, unclassifiable case. [Arch Clin Exp Surg 2017; 6(1.000): 45-48