Diagnosing increased muscle activity and occlusal stress in temporo mandibular joint syndrome with Periotest

Bei 38 Patienten mit funktioneller Myoarthropathie und 25 Probanden einer Kontrollgruppe mit parodontal gesundem Gebiß wurden Periotestwerte bestimmt. Die Periotestmessungen wurden sowohl ohne Okklusalkontakt als auch in maximaler Interkuspidation durchgeführt. Der Vergleich der Patienten mit Myoarthropathie und der Probanden ohne Muskelbefund ergab signifikante Unterschiede auf dem 1 %.Niveau sowohl bei Periotestwerten ohne Okklusalkontakt als auch vor allem bei den Differenzen der Periotestwerte ohne Okklusalkontakt und der Periotestwerte in maximaler Interkuspidation. Dies betraf vor allem die Prämolaren und die ersten Molaren. Bei Probanden ohne Muskelbefund ergaben sich Periotestwertdifferenzen zwischen -2,0 und -3,4 (Vertrauensbereiche). Bei Patienten mit Muskelbefund waren die Periotestwerte mit -5,4 ... -7,9 ausgeprägter negativ. Punktbiserielle Korrelationskoeffizienten ergaben einen besonders ausgeprägten Zusammenhang zwischen Periotestwertdifferenzen und der Aktivität der aduktorischen Kaumuskulatur.Periotest measurements were carried out not in occlusal contact to the antagonist tooth and under maximum habitual occlusion in 38 patients with functional temporo mandibular joint syndrome and in a control group of 25 test subjects with periodontally sound dentition. A comparison between the patients with temporo mandibular joint syndrome and test subjects without muscle findings showed significant (1) variations both for Periotest measurements not in occlusal contact and particularly for Periotest value differences of the measurement carried out under maximum habitual occlusion and the measurement not in occlusal contact. This was especially true for the premolars and the first molars. In the test subjects without muscle findings, Periotest value differences were between -2.0 and -3.4 (confidence intervals). In patients with muscle findings, the Periotest value differences of -5.4 to -7.9 were greater. Point-biserial correlation coefficients showed a particularly pronounced correlation between Periotest value differences and sensitivity to pressure in the aductory masticatory muscles

Periotest values and occlusion

Bei 43 Patienten mit marginaler Parodontitis wurden an 905 Zähnen die Perio-testwerte ohne Okklusion und in maximaler Interkuspidation ermittelt. An klini-schen Befunden wurden die quantitativ meßbaren Parameter Tiefe der Sulcus-taschen, Rezession, Papillenblutungsindex, Knochenabbau und die qualitativen Merkmale Kippung, Füllung, Schliffflächen im Okklusionsfeld und exzentrische Schliffflächen erhoben. Der Knochenabbau wurde durch Ausmessen von Mundfilmen bestimmt. Multiple lineare Regressionsrechnungen zwischen Periotestwert ohne Okklusion und Differenz der Periotestwerte in maximaler Interkuspidation und ohne Okklusion als abhängigen Variablen und den quantitativen Parametern als unabhängige Variablen ergab Koeffizienten der Determination von 61 % für den Pe-riotestwert ohne Okklusion und 40 % für die Periotestwertdifferenz. Der Einfluß des Knochenabbaus dominierte deutlich gegenüber dem Einfluß der übrigen quantitativen Parameter. Der Einfluß der traumatischen Parameter Kippung, Füllung und Schliffflächen auf die Regression zwischen Periotestwertdifferenzen und Knochenabbau wird dargestellt. Signifikant höhere Periotestwertdifferenzen bei Zahnkippungen bringen ein okklusales Trauma zum Ausdruck. Schliffflächen im Okklusionsfeld haben traumatische Bedeutung. Exzentrische Schliffflächen wirken ebenfalls traumatisierend bei parodontal progredient geschädigten Zähnen. Okklusionsstörungen können bei bestehender marginaler Parodontitis zu verstärktem Knochenabbau führen.Numerous experiments have been carried out in order to identify occlusal trauma as an etiologic factor in the pathogenesis of periodontopathies. With Periotest (http://www.periotest.de/) an instrument is available to quantify occlusal overstressing. In 905 teeth and 43 patients with periodontitis the Perio-test values were determined without occlusal contact and under maximum habitual occlusion. Clinical parameters like probing depth, recession, papillary bleeding index, bone resorption and qualitative such as tipped tooth, filling, abrasion facets in the occlusal areas and eccentric abrasion facets were evaluated. Bone resorption was determined based on intraoral radiographs. Multi-ple linear regression calculations between standard Periotest values (Periotest value without tooth contact) or Periotest value differences (the difference between Periotest values under maximum habitual occlusion and without occlusal contact) as dependent variables and the quanti-tative parameters as independent variables resulted in determination coefficients of 61 for the Periotest value without occlusal contact and 40 for the Periotest value difference. The influence of bone resorption clearly dominated over all other quantitative parameters. Occlusal parameters as tipped teeth, restorations and abrasion facets were explored in teeth without bone resorption and without pathological pockets. Significantly higher Periotest values and significantly more negative Periotest value differences in tipped teeth were interpreted as a possible source of occlusal trauma. Less negative Periotest value differences in teeth with ec-centric abrasion facets indicate reduced intercuspidation. Abrasion facets in the occlusal areas tend to cause higher stressing. Restorations had no effect on Periotest values and Periotest value differences

Area-dependent enlargement ratios of panoramic tomography depending on incorrect patient positioning and its significance for implant dentistry

Dokument 1: Teil 1: Orthograde Patientenpositionierung Dokument 2: Teil 2: Asymmetric patient positioning - Englische Version Dokument 3: Teil 2: Unsymetrische Fehlpositionierung - Deutsche Version Dokument 4: Teil 3: Symmetric patient positioning - Englische Version Dokument 5: Teil 3: Symetrische Fehlpositionierung - Deutsche Version Dokument 6: Anhang: Horizontale Vergrößerung an der apikalen Implantatstufe - Deutsche Version Dokument 7: Appendix: Horizontal magnification factors at the apical implant step - Englische Version *************************************************** In der vorliegenden Arbeit wurde das Verhalten der vertikalen und horizon-talen Vergrößerungsfaktoren auf der Panoramaschichtaufnahme in den ver-schiedenen Implantatregionen des Ober- und Unterkiefers untersucht. Ein Verfahren wird vorgestellt, das die Bestimmung der regionalen Vergrößerungsfaktoren in Abhängigkeit von der Implantatregion und der Fehlpositionierung des Patienten zuläßt. Dabei werden gut definierte Merkmale am Implantatkörper (Frialit 2- Implantat) als Referenzpunkte herangezogen. Da in der horizontalen Dimension die Patientenpositionierung einen großen Einfluß auf die Vergrößerungs-faktoren vor allem in der Interforaminalregion nimmt, kann die Aufnahme metalldichter Strukturen bekannter Abmessungen, wie z.B. von 5 mm Kugeln, auch weiterhin empfohlen werden. Wenn diese Ergebnisse berücksichtigt werden, stellt die Panoramaschichttechnik ein geeignetes Verfahren sowohl für die präimplantologische Diagnostik als auch für die Verlaufs- und Erfolgskontrollen dar.Dokument 1: Teil 1: Orthograde Patientenpositionierung Dokument 2: Teil 2: Asymmetric patient positioning - English version Dokument 3: Teil 2: Unsymetrische Fehlpositionierung - German version Dokument 4: Teil 3: Symmetric patient positioning - English version Dokument 5: Teil 3: Symetrische Fehlpositionierung - German version Dokument 6: Anhang: Horizontale Vergrößerung an der apikalen Implantatstufe - German version Dokument 7: Appendix: Horizontal magnification factors at the apical implant step - English version *************************************************** The aim of this work was to study the behavior of vertical and horizontal enlargement ratios in panoramic tomography in the various implant regions of maxilla and the mandible. A method is presented that admits determination of regional enlargement ratios as a function of implant region. Clearly defined characteristics on the implant body (Frialit 2-implants) are used as reference positions. Because the patient positioning in the horizontal dimension has a great influence on the magnification factors, particularly in the interforaminal region, imaging of dense metallic structures of known dimensions, such as 5-mm balls, can also continue to be recommended. When these results are considered, the panoramic radiography technique is demonstrated to be a suitable procedure for both pre-implant diagnostics and also for monitoring the procedure and the success of the procedure

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

Impacts of the Tropical Pacific/Indian Oceans on the Seasonal Cycle of the West African Monsoon

The current consensus is that drought has developed in the Sahel during the second half of the twentieth century as a result of remote effects of oceanic anomalies amplified by local land–atmosphere interactions. This paper focuses on the impacts of oceanic anomalies upon West African climate and specifically aims to identify those from SST anomalies in the Pacific/Indian Oceans during spring and summer seasons, when they were significant. Idealized sensitivity experiments are performed with four atmospheric general circulation models (AGCMs). The prescribed SST patterns used in the AGCMs are based on the leading mode of covariability between SST anomalies over the Pacific/Indian Oceans and summer rainfall over West Africa. The results show that such oceanic anomalies in the Pacific/Indian Ocean lead to a northward shift of an anomalous dry belt from the Gulf of Guinea to the Sahel as the season advances. In the Sahel, the magnitude of rainfall anomalies is comparable to that obtained by other authors using SST anomalies confined to the proximity of the Atlantic Ocean. The mechanism connecting the Pacific/Indian SST anomalies with West African rainfall has a strong seasonal cycle. In spring (May and June), anomalous subsidence develops over both the Maritime Continent and the equatorial Atlantic in response to the enhanced equatorial heating. Precipitation increases over continental West Africa in association with stronger zonal convergence of moisture. In addition, precipitation decreases over the Gulf of Guinea. During the monsoon peak (July and August), the SST anomalies move westward over the equatorial Pacific and the two regions where subsidence occurred earlier in the seasons merge over West Africa. The monsoon weakens and rainfall decreases over the Sahel, especially in August.Peer reviewe

Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks

A search is presented for narrow heavy resonances X decaying into pairs of Higgs bosons (H) in proton-proton collisions collected by the CMS experiment at the LHC at root s = 8 TeV. The data correspond to an integrated luminosity of 19.7 fb(-1). The search considers HH resonances with masses between 1 and 3 TeV, having final states of two b quark pairs. Each Higgs boson is produced with large momentum, and the hadronization products of the pair of b quarks can usually be reconstructed as single large jets. The background from multijet and t (t) over bar events is significantly reduced by applying requirements related to the flavor of the jet, its mass, and its substructure. The signal would be identified as a peak on top of the dijet invariant mass spectrum of the remaining background events. No evidence is observed for such a signal. Upper limits obtained at 95 confidence level for the product of the production cross section and branching fraction sigma(gg -> X) B(X -> HH -> b (b) over barb (b) over bar) range from 10 to 1.5 fb for the mass of X from 1.15 to 2.0 TeV, significantly extending previous searches. For a warped extra dimension theory with amass scale Lambda(R) = 1 TeV, the data exclude radion scalar masses between 1.15 and 1.55 TeV

Measurement of the top quark mass using charged particles in pp collisions at root s=8 TeV

Peer reviewe

Search for supersymmetry in events with one lepton and multiple jets in proton-proton collisions at root s=13 TeV

Peer reviewe

Measurement of the Splitting Function in &ITpp &ITand Pb-Pb Collisions at root&ITsNN&IT=5.02 TeV

Data from heavy ion collisions suggest that the evolution of a parton shower is modified by interactions with the color charges in the dense partonic medium created in these collisions, but it is not known where in the shower evolution the modifications occur. The momentum ratio of the two leading partons, resolved as subjets, provides information about the parton shower evolution. This substructure observable, known as the splitting function, reflects the process of a parton splitting into two other partons and has been measured for jets with transverse momentum between 140 and 500 GeV, in pp and PbPb collisions at a center-of-mass energy of 5.02 TeV per nucleon pair. In central PbPb collisions, the splitting function indicates a more unbalanced momentum ratio, compared to peripheral PbPb and pp collisions.. The measurements are compared to various predictions from event generators and analytical calculations.Peer reviewe

Measurement of nuclear modification factors of gamma(1S)), gamma(2S), and gamma(3S) mesons in PbPb collisions at root s(NN)=5.02 TeV

The cross sections for ϒ(1S), ϒ(2S), and ϒ(3S) production in lead-lead (PbPb) and proton-proton (pp) collisions at √sNN = 5.02 TeV have been measured using the CMS detector at the LHC. The nuclear modification factors, RAA, derived from the PbPb-to-pp ratio of yields for each state, are studied as functions of meson rapidity and transverse momentum, as well as PbPb collision centrality. The yields of all three states are found to be significantly suppressed, and compatible with a sequential ordering of the suppression, RAA(ϒ(1S)) > RAA(ϒ(2S)) > RAA(ϒ(3S)). The suppression of ϒ(1S) is larger than that seen at √sNN = 2.76 TeV, although the two are compatible within uncertainties. The upper limit on the RAA of ϒ(3S) integrated over pT, rapidity and centrality is 0.096 at 95% confidence level, which is the strongest suppression observed for a quarkonium state in heavy ion collisions to date. © 2019 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.Peer reviewe