Coronectomy of the mandibular third molar: a prospective study of 20 procedures

Oral surgeon in private practice, Plovdiv, Bulgaria, Oral and maxillofacial surgeon, Department of Oral Surgery, Faculty of Dental Medicine, Medical University, Plovdiv, BulgariaSummary Coronectomy is a surgical procedure designed to avoid the risk of iatrogenic neurological injury to the inferior alveolar nerve (IAN). The aim of this study was to evaluate success rate of coronectomy. Material and methods: Twenty patients underwent 20 coronectomy procedures of impacted mandibular third molar with close proximity to IAN evaluated on preoperative radiographs. The procedure was performed under mandibular nerve block. Follow-up appointments were perform at 1 week, 1, 6 months. Results: No patients developed IAN injury and no cases of root exposure were found. Eighteen wounds healed primary. In two cases the socket opened and healed secondary. No one root fragments were removed. Conclusion: Coronectomy of wisdom teeth is a safe technique - effective alternative to extraction, when the wisdom tooth shows radiographic signs of close proximity of the IAN to the root

Manual lymphatic drainage techniques reduces postoperative facial swelling after third molar surgery

Department of Oral surgery, Faculty of dental medicine, Medical University, Plovdiv, BulgariaSummary Manual lymphatic drainage (MLD) is an unique manual intervention pioneered by Emil and Estrid Vodder. The aim of this study was to investigate whether the application of MLD, in case of surgically removal of impacted third molars, can efficiently diminish postoperative swelling. Material and methods: Sixty patients with mandibular third molars, that required surgical removal, were divided into two equal groups: MLD group (30 patients) and control group (30 patients). Each patient underwent lower third molar extraction. MLD was performed on the neck region, using Vodder’s method, once a day - immediately after extraction, until the suture removal. Swelling was evaluated prior to operation, on the first, third and seventh postoperative day with the objective method - a linear measurement. The six landmarks of measurement were as follows: tragus-lip junction, traguspogonion, mandibular angle-external corner of eye, mandibular angle-ala nasi, mandibular angle-lip junction, mandibular angle-median point of chin. Results: All lines demonstrated a significant reduction of swelling in the MLD group compared to the control group. Conclusion: MLD is an efficient method for managing postoperative swelling after the removal of impacted third mandibular molars

On the Complete Integrability of Nonlinear Dynamical Systems on Discrete Manifolds within the Gradient-Holonomic Approach

A gradient-holonomic approach for the Lax type integrability analysis of differentialdiscrete dynamical systems is devised. The asymptotical solutions to the related Lax equation are studied, the related gradient identity is stated. The integrability of a discrete nonlinear Schredinger type dynamical system is treated in detail.Comment: 20 page

Epidemiology of maxillofacial trauma in the elderly: a European multicenter study

ABSTRACT Introduction: The progressive aging of European population seems to determine a change in the epidemiology, incidence and etiology of maxillofacial fractures with an increase in the frequency of old patients sustaining craniofacial trauma. The objective of the present study was to assess the demographic variables, causes, and patterns of facial fractures in elderly population (with 70 years or more). Materials and Methods: The data from all geriatric patients (70 years or more) with facial fractures between January 1, 2013, and December 31, 2017, were collected. The following data were recorded for each patient: gender, age, voluptuary habits, comorbidities, etiology, site of facial fractures, synchronous body injuries, Facial Injury Severity Score (FISS). Results: A total of 1334 patients (599 male and 735 female patients) were included in the study. Mean age was 79.3 years, and 66% of patients reported one or more comorbidities. The most frequent cause of injury was fall and zygomatic fractures were the most frequently observed injuries. Falls were associated with a low FISS value (p<.005). Concomitant injuries were observed in 27.3% of patients. Falls were associated with the absence of concomitant injuries. The ninth decade (p <.05) and a high FISS score (p <.005) were associated with concomitant body injuries too. Conclusions: This study confirms the role of falls in the epidemiology of facial trauma in the elderly, but also highlights the frequency of involvement of females, and the high frequency of zygomatic fractures.Peer reviewe

Geophysical and atmospheric evolution of habitable planets

The evolution of Earth-like habitable planets is a complex process that depends on the geodynamical and geophysical environments. In particular, it is necessary that plate tectonics remain active over billions of years. These geophysically active environments are strongly coupled to a planet's host star parameters, such as mass, luminosity and activity, orbit location of the habitable zone, and the planet's initial water inventory. Depending on the host star's radiation and particle flux evolution, the composition in the thermosphere, and the availability of an active magnetic dynamo, the atmospheres of Earth-like planets within their habitable zones are differently affected due to thermal and nonthermal escape processes. For some planets, strong atmospheric escape could even effect the stability of the atmosphere

Measurement of differential cross sections for top quark pair production using the lepton plus jets final state in proton-proton collisions at 13 TeV

National Science Foundation (U.S.

Particle-flow reconstruction and global event description with the CMS detector

The CMS apparatus was identified, a few years before the start of the LHC operation at CERN, to feature properties well suited to particle-flow (PF) reconstruction: a highly-segmented tracker, a fine-grained electromagnetic calorimeter, a hermetic hadron calorimeter, a strong magnetic field, and an excellent muon spectrometer. A fully-fledged PF reconstruction algorithm tuned to the CMS detector was therefore developed and has been consistently used in physics analyses for the first time at a hadron collider. For each collision, the comprehensive list of final-state particles identified and reconstructed by the algorithm provides a global event description that leads to unprecedented CMS performance for jet and hadronic tau decay reconstruction, missing transverse momentum determination, and electron and muon identification. This approach also allows particles from pileup interactions to be identified and enables efficient pileup mitigation methods. The data collected by CMS at a centre-of-mass energy of 8 TeV show excellent agreement with the simulation and confirm the superior PF performance at least up to an average of 20 pileup interactions

Optimasi Portofolio Resiko Menggunakan Model Markowitz MVO Dikaitkan dengan Keterbatasan Manusia dalam Memprediksi Masa Depan dalam Perspektif Al-Qur`an

Risk portfolio on modern finance has become increasingly technical, requiring the use of sophisticated mathematical tools in both research and practice. Since companies cannot insure themselves completely against risk, as human incompetence in predicting the future precisely that written in Al-Quran surah Luqman verse 34, they have to manage it to yield an optimal portfolio. The objective here is to minimize the variance among all portfolios, or alternatively, to maximize expected return among all portfolios that has at least a certain expected return. Furthermore, this study focuses on optimizing risk portfolio so called Markowitz MVO (Mean-Variance Optimization). Some theoretical frameworks for analysis are arithmetic mean, geometric mean, variance, covariance, linear programming, and quadratic programming. Moreover, finding a minimum variance portfolio produces a convex quadratic programming, that is minimizing the objective function ðð¥with constraintsð ð 𥠥 ðandð´ð¥ = ð. The outcome of this research is the solution of optimal risk portofolio in some investments that could be finished smoothly using MATLAB R2007b software together with its graphic analysis