A graph is l-apex if it can be made planar by removing at most l vertices. In this paper we show that the vertex set of any graph not containing an l-apex graph as a minor can be quickly partitioned into 2 l sets inducing graphs with small treewidth. As a consequence, several maximum induced-subgraph problems when restricted to graph classes not containing some special l-apex graphs as minors, ...

In spite of the frequent involvement of many cardiac diseases, it is difficult to evaluate the left ventricular apex in detail with transthoracic echocardiography, a first-line imaging modality in cardiovascular diseases, because the apex is very closely located at the echocardiographic probe. Cardiac magnetic resonance enables us to evaluate the cardiac apex without any limitation to the image...

this report describes a case of an eight years old girl who was treated for complicated crown fracture of right maxillary central incisor because of a sport accident. for the tooth total pulpotomy was performed in order to achieve apexogenesis and the tooth was restored with a composite resin. the patient was reviewed over 10 years. at first the tooth showed continued root development and compl...

introduction: the purpose of this in vitro study was to compare the accuracy of working length determination using the apex locator versus conventional radiography in c-shaped canals. methods and materials: after confirming the actual c-shaped anatomy using cone-beam computed tomography (cbct), 22 extracted c-shaped mandibular second molars were selected and decoronated at the cemento-enamel ju...

BACKGROUND Several studies have described the differences in electromyographic activity and histological changes of paravertebral muscles in patients with adolescent idiopathic scoliosis (AIS). However, there is little knowledge about the muscle volumetric and fatty infiltration imbalance of patients with AIS. MATERIAL AND METHODS Thirty-four patients with AIS were evaluated with standardized a...

In this paper, we proved the following result: Let G be a (k + 2)-connected, non-(k − 3)apex graph where k ≥ 2. If G contains three k-cliques, say L1, L2, L3, such that |Li ∩ Lj| ≤ k − 2(1 ≤ i < j ≤ 3), then G contains a Kk+2 as a minor. Note that a graph G is t-apex if G− X is planar for some subset X ⊆ V (G) of order at most t . This theorem generalizes some earlier results by Robertson, Seym...

AIM To compare ex vivo the performance of the Apex Finder and the Root ZX apex locators, with and without irrigant, in canals having different diameters. METHODOLOGY Sixty canals in 60 teeth were prepared using stainless steel hand files and 0.04 taper NiTi rotary instruments. During preparation the narrowest diameter of the canal was transported to the apical root surface. The canals were ir...

AIMS Pulsed Doppler measurement of left atrial appendage (LAA) emptying velocity, a marker of left atrium contractile function, has been shown to predict success of cardioversion, thrombo-embolic risk, and maintenance of sinus rhythm after cardioversion and pulmonary vein isolation. However, in the published literature, emptying velocity measurement location is not uniform, and no standard curr...

one of the fundamental parameters for endodontic success. Traditionally this has been determined using radiography, but electronic apex locators are increasingly being used. Electronic apex locators reduce the number of radiographs required and assist where radiographic methods create difficulty. The use of an electronic apex locator in combination with the radiograph is greater precision in th...