Spinal Dysraphisms: A New Anatomical–Clinicoradiological Classification

Background Spinal dysraphisms refer to the congenital abnormalities of the spine and spinal cord due to aberrations in the processes of gastrulation, primary neurulation, and secondary neurulation. Embryology of many complex spinal dysraphisms are yet poorly understood and there is no agreeable anatomical–clinicoradiological classification with inclusion of recently documented and complex spinal dysraphisms. Aims and Objectives The main objective of this study was to review the imaging features of spinal dysraphisms with a better understanding of embryological abnormalities and propose a new classification inclusive of all complex and unusual dysraphisms based on anatomical and clinicoradiological correlation. Materials and Methods This was a retrospective single institutional observational study of 391 cases of spinal dysraphism for 10 years in our institution. Of 391 cases included in the study, 204 were males and 187 were females. Also, 123 cases belonged to the 0–6 months age group, 38 cases belonged to the 7–12 months age group, 156 belonged to the 1–5 years age group, 39 cases belonged to the 6–10 years age group, and 35 cases belonged to 10–20 years age group. Results An anatomical–clinicoradiological analysis of cases yielded a high proportion of cases of spinal lipomas, including lipomyeloceles and lipomyelomeningoceles (31.3%) and posterior myelomeningocele (14.2%). Anterior myelocoele (0.2%), sacral chordoma(0.2%), and intrasacral meningocele (0.2%) formed the least proportion of cases. A new classification was proposed based on the analysis of acquired data. Conclusion A structured approach in imaging spinal dysraphism is necessary for imaging evaluation in recent years. The proposed new classification based on clinicoradiological correlation and anatomic location is inclusive of unusual and complex dysraphisms.

SplitTrie: A Fast Update Packet Classification Algorithm with Trie Splitting

Software Defined Network (SDN) currently is widely used in the implementation of new network technologies owing to its distinctive advantages. In changeable SDN environments, the update performance of SDN switches has significant importance for the overall network performance because packet processing could be interrupted by ruleset updating in SDN switches. In order to guarantee high update performance, we propose a new classification algorithm, SplitTrie, based on trie structures and trie splitting. SplitTrie splits rulesets according to the field type vectors of rules. The splitting can improve the update performance because it reduces the trie structure sizes. Experimental results demonstrated that SplitTrie could achieve 20 times of update speed in the complex rulesets comparing the method without trie splitting.

General dental practitioners’ perceptions on Team-based learning pedagogy for continuing dental education

Introduction: Team-based learning (TBL) pedagogy is a structured, flipped classroom approach to promote active learning. In April 2019, we designed a TBL workshop to introduce the New Classification of Periodontal Diseases 2017 to a group of general dental practitioners (GDPs). We aimed to investigate GDPs feedback on learning this new classification using TBL pedagogy. Methods: Two articles related to the 2017 classification were sent to 22 GDPs 2 weeks prior to a 3-hour workshop. During the face-to-face session, they were randomly assigned to five groups. They participated in individual and group readiness assurance tests. Subsequently, the GDPs had inter- and intragroup facilitated discussions on three simulated clinical cases. They then provided feedback using a pen-to-paper survey. Based on a 5-point Likert scale (1-strongly disagree to 5-strongly agree), they indicated their level of agreement on items related to the workshop and their learning experience. Results: Majority (94.7%, 18 out of 19 GDPs) agreed the session improved their understanding of the new classification and they preferred this TBL pedagogy compared to a conventional lecture. All learners agreed they can apply the knowledge to their work and there was a high degree of participation and involvement during the session. They found the group discussion and the simulated clinical cases useful. Conclusion: A TBL workshop is suitable for clinical teaching of the New Classification of Periodontal Diseases 2017 for GDPs. Its structure promotes interaction among learners with the opportunity to provide feedback and reflection during the group discussions. This model might be a good pedagogy for continuing dental education.

Classification of underground mining works within the Tg. Ocna salt mine from the point of view of gas emissions

According to the new classification method, salt mines and underground work or areas where methane has not been observed but for which methane has been observed in boreholes found in rock massifs are considered to be fire mines / mine areas or mining work. This new classification allows only the effective areas of exploitation to be maintained in the wire regime, the rest of the salt mine being considered non-wire. The purpose of this paper is to determine the rate of methane (explosive gas) and carbon dioxide (oxidizing gas) in the mining operations of the Tg-Ocna salt mine, given its classification.

Definition and Classification of Bioceramic Endodontic Sealers

Introduction: The term “bioceramic” is used in endodontics to describe various products and is often used in general terms for mineral trioxide aggregate (MTA) and other hydroscopic dental cements (HDC), which creates confusion in the terminology. Aim: The aim of the study is to present a definition and an original classification of bioceramic endodontic sealers. Materials and methods: A total of 123 articles were found by the PubMed search engine using the key phrase “bioceramic endodontic sealers”. Of these 123 articles, we analyzed 20 articles that contain information about the composition, properties, definition, and classification of bioceramic endodontic sealers. Results: In accordance with the collected data on the composition and the delivery form of calcium silicate endodontic sealers, we propose a new definition of bioceramic endodontic sealers that clarifies the specificities of these materials. In the new classification they are divided by two criteria: source of calcium silicate and form of delivery. It also contains the particular products’ names in order to aid their usage in the clinical practice.  Conclusions: The new definition of bioceramic endodontic sealers clears out the confusion in the terminology, which promotes the classification of these products and helps understanding their clinical application.

CHRONIC POSTINFARCTION ANEURYSMS OF THE LEFT VENTRICLE: HISTORY, CLINICAL FEATURES, DIAGNOSTIC METHODS. NEW CLASSIFICATION OF CHRONIC POSTINFARCTION ANEURYSMS OF THE LEFT VENTRICLE IN PATIENTS WITH CORONARY ARTERY DISEASE.

the article highlights the historical aspects of the development of the concept of diagnosis and treatment of post-infarct left ventricular aneurysms, the possibilities of the main diagnostic methods, and also offers a new classification of post-infarct left ventricular aneurysms, taking into account the type of blood supply and the nature of the coronary lesion, which allows determining the optimal treatment strategy

Description of a new species of the genus Neopseustis Meyrick, 1909 from China, with a new classification of the genus (Lepidoptera, Neopseustoidea, Neopseustidae)

A new species of the genus Neopseustis Meyrick, 1909, Neopseustis chentangensis S.Y. Huang & Chen sp. nov., which was confirmed by both morphological and molecular methods, is described from Xizang, China. This is currently the westernmost species in Asia of the primitive lepidopteran family Neopseustidae. The new species is externally reminiscent of N. moxiensis Chen & Owada, 2009; however, it can be easily distinguished from the latter by comparison of the male genitalia and is further distinguished by the large genetic distance in DNA barcodes (COI). The adult and genitalia of the new and similar species have been illustrated. Utilizing our new data, a new classification of the genus is provided, with its members subdivided into four species groups: the meyricki-group, the moxiensis-group, the bicornuta-group, and the chentangensis-group, which are supported by both molecular and morphological evidence. A checklist of the genus and a key to the species groups are also provided.