Search results for "Bone"
showing 10 items of 2629 documents
Ventastega curonica and the origin of tetrapod morphology.
2008
The gap in our understanding of the evolutionary transition from fish to tetrapod is beginning to close thanks to the discovery of new intermediate forms such as Tiktaalik roseae. Here we narrow it further by presenting the skull, exceptionally preserved braincase, shoulder girdle and partial pelvis of Ventastega curonica from the Late Devonian of Latvia, a transitional intermediate form between the 'elpistostegids' Panderichthys and Tiktaalik and the Devonian tetrapods (limbed vertebrates) Acanthostega and Ichthyostega. Ventastega is the most primitive Devonian tetrapod represented by extensive remains, and casts light on a part of the phylogeny otherwise only represented by fragmentary ta…
La rappresentazione della Gloria monarchica attraverso l’effimero nei solenni funerali di Filippo V (1747) e di Carlo III di Borbone (1789) in Sicilia
2018
Nel 1747 e nel 1789 vennero sontuosamente organizzati a Palermo, capitale del Regno di Sicilia, i solenni funerali di Filippo V e di Carlo III del ramo dei Borbone di Spagna. La trasposizione di un’articolata impalcatura erudita e trionfalistica, organizzata nelle occasioni commemorative e diffusa attraverso la stampa, nella forma figurativa e sceno-tecnica degli apparati effimeri innalzati all’interno della cattedrale, appare tra gli aspetti più significativi di questi eventi luttuosi. Le riproduzioni degli allestimenti in onore dei due sovrani sono note attraverso le incisioni a corredo dei testi divulgativi. Questi grafici superstiti riflettono e spiegano le mutazioni estetiche del perio…
La "Repubblica della scienza" nella Sicilia borbonica tra mito e realtà
2014
L’indagine promossa da Domenico Ligresti ci restituisce un’immagine della società siciliana tra fine Settecento e prima metà dell’Ottocento molto articolata, punte di qualità si mescolavano a sacche di arretratezza. Emerge che la Sicilia del settecento era in sintonia con la realtà culturale europea. Lettere, libri, giornali e uomini circolavano in una “repubblica della scienza “ che superava i confini territoriali, ideologici e religiosi. Tutela dei beni culturali, creazione di un sistema universitario, studio della medicina, riforme amministrative apparentemente disegnano un percorso riformistico ideale, ma in realtà la creazione del Regno delle due Sicilie, la dura repressione dei moti r…
Biogenic Inorganic Polysilicates (Biosilica): Formation and Biomedical Applications
2013
The siliceous sponges, the demosponges and hexactinellid glass sponges, are unique in their ability to form biosilica structures with complex architectures through an enzyme-catalyzed mechanism. The biosilica skeleton of these sponges with its hierarchically structure and exceptional opto-mechanical properties has turned out to be an excellent model for the design of biomimetic nanomaterials with novel property combinations. In addition, biosilica shows morphogenetic activity that offers novel applications in the field of bone tissue engineering and repair. In recent years, much progress has been achieved towards the understanding of the principal enzymes, the silicateins that form the spon…
Active unilateral condylar hyperplasia : assessment of the usefulness of single photon emission computed tomography
2020
[Background] This study aims to evaluate whether the uptake difference by the condyles evaluated using single photon emission computed tomography (SPECT) examination is useful for predicting the activity of the feature and the advance of this pathology.
Bone regeneration in diabetic patients. A systematic review
2019
Background Oral bone regeneration techniques (OBRT) attempt to provide the appropriate bone volume and density to correctly accomplish dental implant treatments. The objective was to determine whether differences exist in the clinical outcomes of these techniques between diabetic and non-diabetic patients, considering the level of scientific evidence. Material and Methods A systematic review following PRISMA statements was conducted in the PubMed, Scopus and Cochrane databases with the search terms: “Diabetes Mellitus”, “guided bone regeneration”, “bone regeneration”, “alveolar ridge augmentation”, “ridge augmentation”, bone graft*, “sinus floor augmentation”, “sinus floor elevation”, “sinu…
Evaluation of Risk Parameters in Bone Regeneration Using a Customized Titanium Mesh
2019
PURPOSE The aim of the study was an evaluation of risk factors for an innovative bone regeneration technique using a customized titanium mesh that was tested in a clinical setting. MATERIALS AND METHODS This retrospective study included 65 patients with 70 grafting procedures of osseous defects of the jaws with a customized titanium mesh together with Advanced- and Injectable-Platelet-Rich Fibrin (A- and I-PRF), resorbable membranes, and bone grafting materials. Exposures of the meshes and grafting outcome were analyzed according to a novel classification as (a) punctual and (b) tooth width or complete exposure of the mesh (c). No exposure was stated as (d). RESULTS In 37% of cases, exposur…
Influence of the Use of a Collagen Membrane Placed on the Bone Window after Sinus Floor Augmentation—An Experimental Study in Rabbits
2021
Background: We studied the influence on healing of a resorbable membrane covering the osteotomy site after maxillary sinus grafting, evaluated in different regions of the augmented area. Methods: Maxillary sinus augmentation was performed in 24 New Zealand rabbits. Osteotomy, 4 × 6 mm, were performed bilaterally. A collagenated cortico-cancellous porcine bone was used to fill the elevated region. A collagen membrane was randomly placed over the osteotomy site on one side (MG), and the other side was left uncovered (NMG). The animals were euthanized after 2, 4, and 8 weeks
Smart hydrogels with Spheroids of Adipose stem cells for minimally invasive bone and cartilage regeneration
2022
FlowCT for the analysis of large immunophenotypic data sets and biomarker discovery in cancer immunology
2022
Key Points FlowCT is a new computational workspace for unveiling cellular diversity and objectively identifying biomarkers in large immune monitoring studies.FlowCT identified T-cell biomarkers predictive of malignant transformation and survival in SMM and active MM data sets.