Chiari type III malformation: Case report and review of literature.

Chiari III (CM III) is the rarest of the Chiari malformations, characterized by high cervical or occipital encephalocele and osseous defects, associated with herniation of the posterior cerebral fossa contents through the foramen magnum. We report the case of a female newborn, with a cervico-occipital mass, hypotonia and sharp osteotendinous reflexes in the lower limbs. An MRI was performed showing a low occipital encephalocele with caudal displacement of cerebellar tonsils.

In vitro corrosion study of PLA/Mg composites for cardiovascular stent applications.

The present investigation explores the impact of Mg volume fraction (V) as a controlling parameter of degradation rate in designing patient-specific cardiovascular stents made of PLA/Mg composites. For the purpose of this research, PLA/Mg composite plates containing 1, 3, 5, and 10% V are produced by melt blending and hot press molding. Characterization techniques such as scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD) are employed to study the microstructure of PLA/Mg composites.

Differentiated Strain-Control of Localized Magnetic Modes in Antidot Arrays.

The control of localized magnetic modes has been obtained in NiFe square lattice (600 nm) antidot arrays. This has been performed by tailoring the magnetoelastic field at the scale of the antidot primitive cell. The corresponding heterogeneous strain field distributions have been generated by a PZT substrate and enhanced by the incorporation of a supporting compliant layer.

[Nutcracker syndrome: a rare cause of abdominal pain in adults that shouldn't be ignored: a case report].

Nowadays, the knowledge of vascular abnormalities is essential for all specialists in their clinical practice and may prevent serious complications through early interventions. Nutcraker syndrome is caused by left renal vein (LRV) compression, usually occurring in the fork formed by the abdominal aorta and the superior mesenteric artery (SMA) and leading to the narrowing of the aortomesenteric portion of the left renal vein and to the dilatation of its distal portion. Symptoms are dominated by lumbar, abdominal, pelvic pain and haematuria.

Predictive model of the prostate motion in the context of radiotherapy: A biomechanical approach relying on urodynamic data and mechanical testing.

In this paper, a biomechanical approach relying on urodynamic data and mechanical tests is proposed for an accurate prediction of the motion of the pelvic organs in the context of the prostate radiotherapy. As a first step, an experimental protocol is elaborated to characterize the mechanical properties of the bladder and rectum wall tissues; uniaxial tensile tests are performed on porcine substrates. In a second step, the parameters of Ogden-type hyperelastic constitutive models are identified; their relevance in the context of the implementation of a human biomechanical model is verified by means of preliminary Finite Elements (FE) simulations against human urodynamic data.

Numerical study of the influence of material parameters on the mechanical behaviour of a rehabilitated edentulous mandible.

Objectives: The study dealt with full dental prosthetic reconstruction on four implants. The aim was to analyse the influence of material parameters on the mechanical behaviour of the restored mandible compared to the natural mandible.

Methods: A finite element model of an edentulous mandible with prosthetic rehabilitation was established.

Finite element simulation of interactions between pelvic organs: predictive model of the prostate motion in the context of radiotherapy.

The setting up of predictive models of the pelvic organ motion and deformation may prove an efficient tool in the framework of prostate cancer radiotherapy, in order to deliver doses more accurately and efficiently to the clinical target volume (CTV). A finite element (FE) model of the prostate, rectum and bladder motion has been developed, investigating more specifically the influence of the rectum and bladder repletions on the gland motion. The required organ geometries are obtained after processing the computed tomography (CT) images, using specific softwares.