1,721,036 research outputs found
Restoration of Facial Defects with Digital Technology
No full textThis book takes a step-by-step approach to the resolution of complex facial prosthetic rehabilitations with digital itechnology.
Key features:
• includes coverage of case studies of facial disfiguring due to cancer or trauma using both surgical and prosthetic process
• describes the step-by-step protocol to digitally design ear, oculofacial and nasal prostheses, and to mold manufacturing using modern 3D printing technology
• provide evidence-based state-of-the-art protocol on maxillofacial and craniofacial implant surgery related to the facial rehabilitation
“Restoration of facial defects with digital technology” gives global descriptions of each method so that readers can project, design, and manufacture and maxillofacial prosthesis and customize maxillo facial surgery. It also covers using CAD-CAM technology to reduce the cost and time of making a facial prosthesis. The complete workflow for producing the ear, nasal, and oculofacial prosthesis (implant and mechanically supported) and for oncological maxillo facial surgery is described. The atlas form of the book describes each procedure in a stand-by-step manner so that readers may reproduce the process and obtain improved results will respect to the analogic procedures. This book communicates the most update knowledge and the method of digital technology applied to the maxillofacial rehabilitation workflow, in a way that all may use it as a guide for replication the methodologies presented in this book. This book will help also informatics technicians and biomedical engineers to project and customize the virtual construction of the prosthesis. It also describes how to use the new technology to reduce time and cost of the operatory room. The information in this book will also led readers:
• know the new methodologies to use digital technology instead of analogic procedures by anaplastologists;
• accomplish unusual hygiene procedures of craniofacial implants (Hygienist) ;
• propose prosthetic alternative solution instead of the plastic surgery to the patient who lost ear, nose or facial parts for oncologic or traumatic reasons;
• simplify the plastic reconstructive surgery and the module as a function of the final prosthetic rehabilitation supported by craniofacial implants.
The book has been written by exports in the field, pulling together information from disparate sources into one reference, making it Ideal for anyone working in maxillofacial rehabilitation of the face
RIABILITAZIONE PROTESICA MAXILLO-FACCIALE
No full textLa riabilitazione protesica maxillo-facciale rappresenta un'importante possibilità di recupero funzionale ed estetico per il paziente che è stato sottoposto ad interventi chirurgici nel distretto cranio-facciale.
Infatti, sia nel caso di difetti acquisiti per exeresi oncologica, sia nel caso di difetti dovuti a trauma o congeniti, la Protesi Maxillo-facciale rappresenta un contributo fondamentale all'incremento della qualità della vita del paziente. Tale disciplina non può prescindere da una stretta collaborazione fra il chirurgo , il protesista, l'oncologo ed il radiologo, essendo il lavoro d'equipe essenziale per l'efficacia e la stabilità della terapie riabilitative.
Il testo è frutto di anni di esperienza sia nel trattamento di casi clinici sia nella didattica formativa agli studenti del V° anno del Corso di Laurea in Odontoiatria e Protesi Dentaria. Le nozioni sulla Protesi Maxillo-facciale fornite allo studente meglio lo motivano all'oggettiva gravità di talune situazioni cliniche
Analisi in vitro della quantità di tessuti duri asportati in seguito a preparazioni coronali in protesi fissa
No full textBiomimetic customized composite scaffolds and translational models for the bone regenerative medicine using CAD-CAM technology
No full textNature produces soft and hard materials exhibiting remarkable functional properties by controlling the hierarchical assembly of simple molecular building blocks from the nano- to the macro-scale. Biogenic materials are nucleated in defined nano–micro-dimensioned sites inside the biological environments, in which chemistry can be spatially controlled, in order to monitor the size, shape, and structural organization of biomaterials. With the development of nanotechnology, this strategy employing natural material genesis has attracted attention in designing bioinspired materials at the nanoscale dimensions. In this contest, biomimetic nanostructured hydroxyapatite is a promising biomaterial for bone tissue engineering because this material exhibits excellent biological properties. However, hydroxyapatite is still limited as bone substitute due to the brittleness of the material. Hence, a widespread approach is the creation of hybrid materials with an inorganic or organic bioactive phase mimicking functional bony units and a polymeric phase of a consistency permitting the device to be manipulated to achieve an anatomically compatible shape and allowing surface adsorption of molecules that play active roles in the biological environment. Recently, many studies were developed in order to prepare and test new bioengineered custom-made composite scaffold materials using a combination of CAD/CAM technology to restore full-thickness defects of the bone. Modern 3D printing techniques allow dimensioning of the external volume according to the surgical defect, thus simplifying the surgery and reducing biological morbidity. The use of CAD/CAM technology and the novel composite, biomimetic, and resorbable scaffolds are the promising way to interpret the need of bone regenerative medicine
Preparazioni coronali totali e parziali dei settori posteriori: valutazione della quantità di tessuti duri asportati
No full textNew aesthetic results with auricular prosthesis: two case reports
No full textThe extrinsic and intrinsic coloration of maxillo-facial silicone elastomers has always been a challenge for the clinician in order to obtain a perfect, durable integration with the surrounding skin tissues. This preliminary report describes the method for obtaining good aestethetic results for maxillo-facial prosthesis. This study shows the aesthetic results of a new silicone for the laboratory technique of creating color of the basis for a maxillo-facial prosthesis, with a good matching with human skin. The technique is useful for the direct extrinsic coloration of the surface onto the skin of the patient by means of the RTV version of the same silicone. The technological properties of this material also make it easy to reproduce the emerging profile of the prosthesis from the human skin, avoiding anaesthetic overcounturings. The 12 month follow-up shows excellent and stable aesthetic results, which are not influenced by home care procedures and by the weathering effect on color and on physical properties
RIABILITAZIONE PROTESICA MAXILLO-FACCIALE
No full textLa scelta editoriale di produrre un libro "Print on demand" , che consenta frequenti ed agili aggiornamenti degli argomenti trattati, non è stata sufficiente per sopperire alla aggiunta di tre nuovi capitoli a questo libro.
I capitoli 4,5,6 sono stati integralmente composti per questa nuova edizione, mentre gli aggiornamenti dei restanti capitoli sono stati inseriti all'interno dei precedenti, con un'attualizzazione delle procedure cliniche oggi sempre più utilizzate. I nuovi capitoli affrontano il problema della riabilitazione protesica maxillo-facciale nei pazienti radiotrattati (capitolo 4) e nei pazienti in terapia con bifosfonati (capitolo 5). Il capitolo 6 è dedicato al follow-up nei pazienti riabilitati con protesi su ampie ricostruzioni dei mascellari e con epitesi facciali.
Le moderne tecnologie CAD-CAM che stanno cambiando l'approccio tecnologica e le potenzialità cliniche delle riabilitazioni protesiche in genere, anche nel campo della Protesi Maxillo-facciale rappresentano il settore più avanzato di ricerca scientifica. La completa autonimizzazione delle procedure tecnologiche di realizzazione delle epitesi facciali rappresenta un esempio di queste prospettive di sviluppo.
Ci anima da un lato il deisderio di fornire ai nostri pazienti risposte sempre più adeguate al loro bisogno clinico, dall'altro la necessitò di fornire ai nostri studenti uno strumento adeguato per la conoscenza della Protesi Maxillo-facciale. Per questi motivi ci è sembrato interessante proporre una nuova edizione ampliata ed integrata con i più recenti contributi scientifico-clinici
Microleakage of Temporary Endodontic Restorations in Overdenture Tooth Abutments
No full textPurpose: The sealing of provisional filling material in overdenture tooth abutments during provisional rehabilitation is of primary importance to the long-term success of roots bearing gold casting copies. The aim of this in vivo study was to evaluate the microleakage of four different provisional filling materials after a period of 1 week. Materials and Methods: Five patients needing treatment with overdenture prostheses and scheduled for the extraction of at least four teeth were chosen. After performing endodontic treatment on the roots to be extracted, a standardized cavity preparation 3 mm in depth was made using a diamond bur. Each cavity was filled with one of the four provisional materials selected for the evaluation (Cavit-W, IRM Caps, Guttapercha, Fermit-N), and the interim prostheses were delivered to the patients. After 1 week, the roots were extracted and stored for 24 hours in 0.5% basic fuchsin at 37 ± 1°C for 24 hours. Subsequently, the roots were severed and observed under a stereomicroscope for microleakage evaluation. Results: The materials showed different degrees of microleakage, but none allowed dye penetration to the bottom of the cavity. IRM Caps showed the lowest mean value of dye penetration (168 μm), while Fermit-N showed the highest (1,475 μm). All materials differed from each other (P < .05). Conclusion: Within a period of 1 week, the materials provided acceptable to good sealing properties. All of the materials may be considered suitable for provisional fillings if they do not remain in the oral cavity for more than 1 week. IRM Caps gave the best results
Outdoing best-fit approaches for the manufacturing accuracy evaluation of complete denture bases
Full text linkTo compare the reference geometry approach to the best-fit (or superimposition) approach in the estimation of geometric accuracy relevant to the digital and the analog workflow to fabricate a complete denture. Starting from a model of an edentulous maxilla, the two measuring methodologies were tested to estimate the geometric accuracy of the intaglio surface of the complete dentures fabricated by CNC milling and injection molding. Eight areas of interest were defined at the intaglio surface of the denture base; a sensitivity analysis determined the minimum number of measuring points to calculate a reliable Δ error value. A repeatability analysis was performed to assess the consistency of this experimental reference geometry approach with respect to the clinic acceptable requirements. For the analog workflow, the comparison of the reference geometry results to the best-fit results showed a − 76 (post-dam) ÷ 169 μm (right flange) range of the Δ mean value for the reference geometry approach, to be compared to − 15 (left crest) ÷ 146 μm (right tuberosity) range for the best-fit approach. For the digital workflow, the same comparison showed a − 21 (left crest) ÷ 51 μm (left flange) range for the reference geometry approach, compared to a − 20 (left crest) ÷ 23 μm (left flange) for the best-fit approach. The best-fit approach results in an underestimation of mean Δ error values and their distribution over the entire prosthesis. The reference geometry approach correctly estimates error values while focusing on the identification of sources of errors in the manufacturing process
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