Shaping ability of the profile 25/0.06 and protaper F2 in rotary motion, and reciproc in simulated canals

Background Since the introduction of nickel–titanium (Ni–Ti) instruments to dentistry, a wide variety of Ni–Ti instruments have become commercially available. These Ni–Ti instruments are expensive, which limits their usage in developing countries and forces practitioners to use instruments repeatedly. Another problem is the possible prion cross-contamination associated with the multiple usage of endodontic instruments. In addition, the use of these instruments requires new skills and experience. In this article, the shaping capacities of two conventional rotary file systems, ProFile 25/0.06 and ProTaper F2, were reviewed and compared with the Reciproc single-file system. Methods A total of 45 simulated canals with 40° curvature, in clear resin blocks, were prepared using conventional rotary systems consisting of ProFile orifice shaping (OS) #3 and final flaring #25/.06, Reciproc R25, and ProTaper shaping file SX and finishing file F2. Pre-and post-instrumentation images were analyzed at ten different levels, using AutoCAD 2007 software. The measurement positions were defined in 1-mm intervals: positions 0–3 established the apical part, positions 4–6 constituted the middle part, and positions 7–10 established the coronal part of the canal. The amount of removed resin, the transportation, instrumentation time, change in working length (WL), instrumentation fractures, and the presence of ledge were evaluated. Data were analyzed using ANOVA, Kruskal–Wallis and independent t-test (p < 0.001). Results ProFile removed the least resin (p < 0.001) and caused less transportation than Reciproc and ProTaper, in total (p < 0.001). ProTaper caused more transportation ProFile and Reciproc in the apical part (p < 0.000). Reciproc caused more transportation than ProTaper and ProFile (p < 0.001), and the transportation tendency toward the inner aspect of the curvature in the middle part. Reciproc caused the less transportation than ProFile and ProTaper in the coronal part. The transportations tended to occur toward the outside of the curvature, except the middle part with Reciproc and at points 5 and 6 with ProTaper. There were no significant differences among the groups in terms of maintaining the original WL. Reciproc was significantly faster than the others group (p < 0.001). Only one instrument fracture (25/0.06 ProFile) was noted. All groups showed one ledge each. Discussion The results of the present study showed that both ProFile 25/06 and ProTaper F2, combined with a file used for coronal enlargement (OS3 and SX), have the potential to create satisfactory canal shape in the curved root canals. Further studies using real human teeth are needed to confirm our results

SUCCESS OF ARTIFICIAL INTELLIGENCE SYSTEM IN DETERMINING ALVEOLAR BONE LOSS FROM DENTAL PANORAMIC RADIOGRAPHY IMAGES

Objectives: The aim of this study was to detect alveolar bone loss from dental panoramic radiographic images using artificial intelligence systems. Material and Methods: A total of 2276 panoramic radiographic images were used in this study. While 1137 of them belong to cases with bone destruction, 1139 were periodontally healthy. The dataset is divided into three parts as training (n=1856) , validation (n=210) and testing set (n= 210). All images in the data set were resized to 1472x718 pixels before training. A random sequence was created using the open-source python programming language and OpenCV, NumPy, Pandas, and Matplotlib libraries effectively. A pre-trained Google Net Inception v3 CNN network was used for preprocessing and data sets were trained using transfer learning. Diagnostic performance was evaluated with the confusion matrix using sensivitiy, specificity, precision, accuracy and F1 score. Results: Of the 105 cases with bone loss, 99 were detected by the AI system. Sensitivity was 0.94, specificity 0.88, precision 0.89, accuracy 0.91 and F1 score 0.91. Conclusion: The convolutional neural network model is successful in determining periodontal bone losses. It can be used as a system to facilitate the work of physicians in diagnosis and treatment planning in the future

Characteristics of food allergy in children: National multicenter study

Conference: Congress of the European-Academy-of-Allergy-and-Clinical-Immunology (EAACI) Location: Lisbon, PORTUGAL Date: JUN 01-05, 2019Background : Food allergies impose a significant burden on the life of the child and the family. In this study, to determine the demographic characteristics of food allergies, we investigated the characteristics of patients with food allergies in different regions of Pediatric Allergy- Immunology departments in Turkey. Method : Turkey ' s National Study of Allergy and Clinical Immunology Society has conducted a Study Group on Food Allergies. 25 centers participated in this multicenter, cross- sectional and descriptive study.European Academy of Allergy and Clinical Immunolog

Diffuse alveolar haemorrhage following an insect bite

Diffüz alveolar hemorajinin çoklu etyolojik nedeni vardır. Sistemik hastalıklardan, çevresel toksinlere, immünolojik nedenlerden, kardiyak patolojilere kadar perspektif genişletilebilir. Böcek ısırıkları sonrası en sık lokal eritem ile sınırlı Ig E aracılı allerjik reaksiyonlar görülür. Sistemik reaksiyon çok az olguda bildirilmiştir. Biz bu yazıda, böcek ısırığı sonrasında gelişen diffüz alveoler hemoraji olgusunu sunuyoruz.Many disorders can cause alveolar hemorrhage including systemic diseases, environmental toxic exposures, autoimmune disorders, and cardiac disorders. The first symptom of the insect sting is IgE mediated local erythema and pain. Systemic reaction to insect sting is an uncommon manifestation and reported in a few cases. In this article we describe a case who developed diffuse pulmonary alveolar hemorrhage following an insect bite

Diffuse alveolar haemorrhage following an insect bite

Diffüz alveolar hemorajinin çoklu etyolojik nedeni vardır. Sistemik hastalıklardan, çevresel toksinlere, immünolojik nedenlerden, kardiyak patolojilere kadar perspektif genişletilebilir. Böcek ısırıkları sonrası en sık lokal eritem ile sınırlı Ig E aracılı allerjik reaksiyonlar görülür. Sistemik reaksiyon çok az olguda bildirilmiştir. Biz bu yazıda, böcek ısırığı sonrasında gelişen diffüz alveoler hemoraji olgusunu sunuyoruz.Many disorders can cause alveolar hemorrhage including systemic diseases, environmental toxic exposures, autoimmune disorders, and cardiac disorders. The first symptom of the insect sting is IgE mediated local erythema and pain. Systemic reaction to insect sting is an uncommon manifestation and reported in a few cases. In this article we describe a case who developed diffuse pulmonary alveolar hemorrhage following an insect bite

Demographic Characteristicts Of Our Patients With Breast Cancer In Diyarbakir And Surrounding

Demographic properties of 115 patients with breast cancer, followed beetwen September 2001-December 2002, were evaluated according to theirs’ clinical and pathological features. Patients were classified regard to age, gender, stage (operabl vs metastatic breast cancer), pathologic features (histologic subtype, grade, size, hormon receptor status, lymph node status), type of treatment, surgical procedure, and site of metastasis. Of them 112 were female, and 3 male, madian age was 37 years. Of them 52% were operabl and 40% were metastatic breast cancer, whereas 8% were locally advanced breast cancer. Histologically; invasive ductal carsinoma, Medullary carsinoma, and tubulolobular carsinoma were found in 85%, 4.8%, and 3.6% of cases, respectivelly. Estrogen receptor (ER) were known in 41% of patients and progesteron receptor (PR) status in 39% of patients. In early breast cancer, modified radically mastectomy, lumpectomy, and simple mastectomy were done in 77%, 21% of patients and 1 patient, respectively. In metastatic breast cancer; site of metastasis were found to be bone, locally and regionally, liver, lung and pleura, and brain. Patients with metastatic breast cancer had recieved paliative radiation therapy (41%), only hormonal therapy (11%) and chemotherapy with or without of hormonal therapy ( 89%)

Unusual case of spinal epidermoid cyst and a concomitant spinal arachnoid cyst

A 38-year-old woman presented with a 12-month history of subjective weakness and pain in her legs. Thoracolumbar MRI revealed two spinal intradural cystic lesions at T5–6 and T11 levels, respectively. The lesion located at the T5–6 level was heterogeneously hyperintense on T2-weighted images and heterogeneously hypointense on T1-weighted images. This lesion showed high signal intensity on diffusion weighted MRI (DWI) and low signal intensity on apparent diffusion coefficient images (ADC). According to the MRI findings, we reported this tumour as a spinal epidermoid cyst. The pathology result suggested that the lesion was an epidermoid cyst. The second intradural lesion, at the T11 level, showed a hypointense signal on T1 and hyperintense signal on T2 images. However, in contrast to the superior lesion, this lesion was hypointense on DWI and hyperintense on ADC. We evaluated the second lesion as an arachnoid cyst according to the MRI findings