The Experts below are selected from a list of 2022 Experts worldwide ranked by ideXlab platform
Humberto Gennari Filho - One of the best experts on this subject based on the ideXlab platform.
-
Evaluación de la deformación de dos siliconas para prótesis Faciales, influencia de la pigmentación y desinfección química Assessment of initial and the permanent deformation of two silicones (Silved Selant and Brascoved) for Facial prostheses under
Editorial Ciencias Médicas, 2010Co-Authors: Marcelo Goiato Coelho, Paula Ribeiro Do Prado, Aline Úrsula Fernandes Rocha, Aldiéris Pesqueira Alves, Rosse Mary Falcón-antenucci, Daniela Micheline Dos Santo, Humberto Gennari FilhoAbstract:La propuesta de este estudio fue analizar el efecto de la pigmentación y de la desinfección química sobre la deformación inicial y permanente de dos siliconas (Silved Selant y Brascoved) utilizadas en la confección de prótesis Faciales. Las muestras para los analisis de deformación inicial y permanente (20 mm × 12,5 mm) fueron confeccionadas de acuerdo con las instrucciones del fabricante. Para cada silicona (n= 40), diez muestras fueron pigmentadas con polvo de maquillaje, diez con óxido de hierro, diez con polvo de cerámica y diez sin pigmentación. Cinco muestras de cada grupo fueron sometidas a desinfección química, con clorhexidina al 2 % por aspersión. Todas las muestras fueron inmersas en suero fisiológico y almacenado en estufa a 35 º ± 1 ºC. Después de 90 días, las muestras fueron sometidas a los exámenes de deformación inicial y permanente. Para ambas propiedades, los datos fueron analizados por el test de Tukey (a= 0,05). Los resultados mostraron que todos los materiales presentaron deformación inicial y permanente independiente de la desinfección química y pigmentación. Los grupos pigmentados con óxido de hierro fueron los que presentaron menor deformación, inicial y permanente, cuando fueron sometidos a desinfección química, independientemente de la silicona usada.The purpose of present study was to analyze the effect of pigmentation and chemical disinfection on the initial and the permanent deformation of two silicones (Silved Selant and Brascoved) for Facial Prosthesis. Initial and permanent deformation tests samples (20 mm × 12.5 mm) were made following the manufacturer's instructions. For each silicone (n= 40), ten samples were used for pigmentation with make up power, ten with iron oxide, ten with ceramics power and tem were tested without pigmentation. Five samples of each group were submitted to chemical disinfection using a 2 % Chlorhexidine spray. All samples were immersed in physiological saline and stored in an oven at 35 º ± 1 ºC. After 90 days, the samples were submitted to initial and permanent deformation tests using a dial indicator. For both properties, data were analyzed by Tukey's test (a= 0.05). The results showed that all the materials had initial and permanent deformation regardless of pigmentation and chemical disinfection. The groups were used for pigmentation with iron oxide showed less initial and permanent deformation when were submitted to the chemical disinfection regardless the silicone used
Ian Gibson - One of the best experts on this subject based on the ideXlab platform.
-
3d topological scanning and multi material additive manufacturing for Facial Prosthesis development
2021Co-Authors: Mazher Iqbal Mohammed, Joseph Tatineni, Brenton Cadd, Greg Peart, Ian GibsonAbstract:Prosthetic-based rehabilitation is an alternative to and offers several advantages over surgical intervention. Prosthetic devices are commonly handmade, requiring significant amounts of skilled labour and subjective manufacturing techniques. This chapter discusses the use of industrial optical scanning methods to capture the surface topology from a volunteer’s Facial anatomy. This data was then used to generate a 3D CAD model, which was further used to design a patient-specific Prosthesis. Amongst the many advantages over the existing techniques are that data collection is non-intrusive, quick to collect and provides anatomically precise information. The use of 3D CAD models provides greater flexibility when developing and evaluating design iterations and further allows for the creation of ‘part libraries’ for use where patients have no initial reference anatomy. Such patient data can also be kept on record should it be required for future use. The final Prosthesis is realised through high-resolution, multi-material additive manufacturing, providing precise model reproduction and adding functionality such as mimicry of soft and hard tissues. This approach provides an optimised, low-cost method for streamlining similar Prosthesis production.
-
augmented patient specific Facial Prosthesis production using medical imaging modelling and 3d printing technologies for improved patient outcomes
Virtual and Physical Prototyping, 2018Co-Authors: Mazher Iqbal Mohammed, Brenton Cadd, Greg Peart, Ian GibsonAbstract:Facial prosthetic offer patients a low risk and high impact treatment option to address underlying Facial defects. Such devices are generally handmade, requiring several labour-intensive manufacturing phases and numerous patient consultations to develop the final device. Therefore, production is a time-consuming and costly process with significant inconvenience to the patient and highly dependent on the skills of the prosthetists, making the whole process highly subjective. We investigate the potential of medical imaging, 3D design modelling and high-resolution 3D printing to augment the production of an auricular Prosthesis for a patient who was previously using a handmade Prosthesis. We reproduce the patient’s uncompromised anatomy from CT scan data, before printing a mirrored template to use in the casting process for a silicone Prosthesis. This technique realises a superior end Prosthesis with a realistic look on the patient while streamlining the current production methodology.
-
applications of 3d topography scanning and multi material additive manufacturing for Facial Prosthesis
SFF Symp 2016 : Proceedings of the 27th Annual International Solid Freeform Fabrication Symposium, 2016Co-Authors: Mazher Iqbal Mohammed, Joseph Tatineni, Brenton Cadd, Greg Peart, Ian GibsonAbstract:Prosthetic based rehabilitation offers several advantages over surgical intervention, however, devices are generally handmade using labour intensive and subjective manufacturing techniques. We investigate the use of optical scanning to capture the surface topography from a volunteer’s Facial anatomy, reconstruct this into a 3D CAD model, and from that design a patient specific Prosthesis. This approach offers many advantages over existing techniques as data collection is non-intrusive, rapid and provides anatomically precise information. A CAD approach affords greater flexibility when evaluating design iterations and allows for the creation of ‘parts libraries’ for use with patients with no initial reference anatomy. The final Prosthesis is realised through high resolution, multi-material 3D printing for precise model reproduction and to add functionalities such as mimicry of soft and hard tissues. Ultimately,we believe our approach provides an optimised, low-cost approach for streamlining the complete methodology for Prosthesis production.
Marcelo Coelho Goiato - One of the best experts on this subject based on the ideXlab platform.
-
magnet retained Facial Prosthesis combined with maxillary obturator
Case Reports in Dentistry, 2013Co-Authors: Mahnaz Hatami, Hamid Badrian, Siamak Samanipoor, Marcelo Coelho GoiatoAbstract:Prosthetic rehabilitation of the midFacial defects has always perplexed prosthodontists. These defects lead to functional and esthetic deficiencies. The purpose of this clinical case report was the presentation of the prosthetic rehabilitation of an extraoral-intraoral defect using two-piece Prosthesis magnetically connected. This Prosthesis has dramatically improved the patient's speech, mastication, swallowing, and esthetic.
-
influence of natural weathering on colour stability of materials used for Facial Prosthesis
Journal of Medical Engineering & Technology, 2012Co-Authors: Daniela Micheline Dos Santos, Marcelo Coelho Goiato, Mario Alexandre Coelho Sinhoreti, Stefan Fiuza De Carvalho Dekon, Marcela Filie Haddad, A Moreno, Aldieris Alves PesqueiraAbstract:Colour stability of resin and silicone is an important factor for longevity of Facial prostheses. The aim of this study was to evaluate the colour stability of resins and silicone for Facial prostheses. Three brands of acrylic resin and one of Facial silicone were evaluated considering pigment incorporation for the colourless materials. Ten samples of each material were fabricated and submitted to measurements of chromatic alteration initially and after 90 and 180 days of weathering natural through visual analysis and spectrophotometry. Data were evaluated by ANOVA and Tukey test (p < 0.05). Statistically significant colour alteration was observed among some materials regardless of the period. The materials did not present a statistical difference between 90 and 180 days except for the pigmented heat-polymerized resin. The colour difference between pigmented Silastic MDX4-4210 and colourless Silastic was statistically significant (p < 0.01) in both periods as well as between pigmented and colourless heat-...
-
evaluation of the shore a hardness of silicone for Facial Prosthesis as to the effect of storage period and chemical disinfection
Journal of Craniofacial Surgery, 2010Co-Authors: Aimee Maria Guiotti, Marcelo Coelho Goiato, Daniela Micheline Dos SantosAbstract:Fac Integradas Santa Fe do Sul, Santa Fe do Sul Dent Sch, Dept Dent Mat & Prosthodont, Santa Fe do Sul, Brazil
-
color stability of polymers for Facial Prosthesis
Journal of Craniofacial Surgery, 2010Co-Authors: Daniela Micheline Dos Santos, Marcelo Coelho Goiato, Mario Alexandre Coelho Sinhoreti, Aline Ursula Rocha Fernandes, Paula Do Prado Ribeiro, Stefan Fiuza De Carvalho DekonAbstract:Color stability of resin and silicone is an important factor for longevity of Facial prostheses. The aim of this study was to evaluate the color stability of resins and silicone for Facial prostheses. Three brands of acrylic resin and 1 of Facial silicone were evaluated considering pigment incorporation for the colorless materials. Ten samples of each material were fabricated and submitted to measurements of chromatic alteration initially and after 252, 504, and 1008 hours of weathering through visual analysis and spectrophotometry. Data were evaluated by analysis of variance and Tukey test (P < 0.05). Results showed a statistically significant difference in color alteration among materials independent of aging. According to visual analysis, the color difference between pigmented and colorless Silastic MDX4-4210 and between pigmented and colorless Classico acrylic resin was statistically significant for the 3 weathering periods. Aging for 1008 hours represented a significant influence on color alteration of all resins. All materials presented chromatic alteration after accelerated artificial aging.
-
marginal deterioration of the silicone for Facial Prosthesis with pigments after effect of storage period and chemical disinfection
Journal of Craniofacial Surgery, 2010Co-Authors: Aimee Maria Guiotti, Marcelo Coelho Goiato, Daniela Micheline Dos SantosAbstract:Abstract The failure of Facial prostheses is caused by limitations in the properties of existing materials, especially flexibility and durability. Therefore, this study evaluated the marginal deterioration of a silicone used for fabrication of Facial prostheses (Silastic MDX4-4210, Dow Corning Corporation, Midland, MI, USA) according to the influence of artificial aging, daily disinfection, and 2 types of pigmentation. Thirty specimens were fabricated and subdivided in 6 groups: without pigmentation, pigmented with make-up powder and iron oxide, and evaluated with and without the action of the disinfectant. Analysis of marginal deterioration was performed on a scanning electron microscope (magnification, ×5000) immediately 6 months and 1 year after fabrication of specimens, following the guidelines of ASTM International. After visual analysis of the photomicrographs, it was noticed that all groups presented marginal deterioration and alterations in surface texture with time. The use of disinfection did not contribute to the marginal deterioration of polymer (silicone), regardless of the pigmentation and artificial aging.
Marcelo Goiato Coelho - One of the best experts on this subject based on the ideXlab platform.
-
Evaluación de la deformación de dos siliconas para prótesis Faciales, influencia de la pigmentación y desinfección química Assessment of initial and the permanent deformation of two silicones (Silved Selant and Brascoved) for Facial prostheses under
Editorial Ciencias Médicas, 2010Co-Authors: Marcelo Goiato Coelho, Paula Ribeiro Do Prado, Aline Úrsula Fernandes Rocha, Aldiéris Pesqueira Alves, Rosse Mary Falcón-antenucci, Daniela Micheline Dos Santo, Humberto Gennari FilhoAbstract:La propuesta de este estudio fue analizar el efecto de la pigmentación y de la desinfección química sobre la deformación inicial y permanente de dos siliconas (Silved Selant y Brascoved) utilizadas en la confección de prótesis Faciales. Las muestras para los analisis de deformación inicial y permanente (20 mm × 12,5 mm) fueron confeccionadas de acuerdo con las instrucciones del fabricante. Para cada silicona (n= 40), diez muestras fueron pigmentadas con polvo de maquillaje, diez con óxido de hierro, diez con polvo de cerámica y diez sin pigmentación. Cinco muestras de cada grupo fueron sometidas a desinfección química, con clorhexidina al 2 % por aspersión. Todas las muestras fueron inmersas en suero fisiológico y almacenado en estufa a 35 º ± 1 ºC. Después de 90 días, las muestras fueron sometidas a los exámenes de deformación inicial y permanente. Para ambas propiedades, los datos fueron analizados por el test de Tukey (a= 0,05). Los resultados mostraron que todos los materiales presentaron deformación inicial y permanente independiente de la desinfección química y pigmentación. Los grupos pigmentados con óxido de hierro fueron los que presentaron menor deformación, inicial y permanente, cuando fueron sometidos a desinfección química, independientemente de la silicona usada.The purpose of present study was to analyze the effect of pigmentation and chemical disinfection on the initial and the permanent deformation of two silicones (Silved Selant and Brascoved) for Facial Prosthesis. Initial and permanent deformation tests samples (20 mm × 12.5 mm) were made following the manufacturer's instructions. For each silicone (n= 40), ten samples were used for pigmentation with make up power, ten with iron oxide, ten with ceramics power and tem were tested without pigmentation. Five samples of each group were submitted to chemical disinfection using a 2 % Chlorhexidine spray. All samples were immersed in physiological saline and stored in an oven at 35 º ± 1 ºC. After 90 days, the samples were submitted to initial and permanent deformation tests using a dial indicator. For both properties, data were analyzed by Tukey's test (a= 0.05). The results showed that all the materials had initial and permanent deformation regardless of pigmentation and chemical disinfection. The groups were used for pigmentation with iron oxide showed less initial and permanent deformation when were submitted to the chemical disinfection regardless the silicone used
Filho, Humberto Gennari - One of the best experts on this subject based on the ideXlab platform.
-
Evaluación de la deformación de dos siliconas para prótesis Faciales, influencia de la pigmentación y desinfección química
2010Co-Authors: Coelho, Marcelo Goiato, Do Prado, Paula Ribeiro, Rocha, Aline Úrsula Fernandes, Alves, Aldiéris Pesqueira, Falcón-antenucci, Rosse Mary, Dos Santo, Daniela Micheline, Filho, Humberto GennariAbstract:The purpose of present study was to analyze the effect of pigmentation and chemical disinfection on the initial and the permanent deformation of two silicones (Silved Selant and Brascoved) for Facial Prosthesis. Initial and permanent deformation tests samples (20 mm × 12.5 mm) were made following the manufacturer's instructions. For each silicone (n= 40), ten samples were used for pigmentation with make up power, ten with iron oxide, ten with ceramics power and tem were tested without pigmentation. Five samples of each group were submitted to chemical disinfection using a 2 % Chlorhexidine spray. All samples were immersed in physiological saline and stored in an oven at 35 ° ± 1 °C. After 90 days, the samples were submitted to initial and permanent deformation tests using a dial indicator. For both properties, data were analyzed by Tukey's test (a= 0.05). The results showed that all the materials had initial and permanent deformation regardless of pigmentation and chemical disinfection. The groups were used for pigmentation with iron oxide showed less initial and permanent deformation when were submitted to the chemical disinfection regardless the silicone used
