The purpose of this study was to assess color alteration of the paints used for iris painting in artificial eyes. Five disks of heat cured acrylic resin were confectioned by microwave energy for each paint analyzed, in a total of 40 specimens. Each specimen consisted of a colorless acrylic resin disk and another of equal size, of scleral white colored acrylic resin, with the painting interposed between the two disks. The specimens were submitted to an accelerated aging process in a chamber under ultraviolet radiation for 1,008 hours. To assess color variation, a reflective spectrophotometer was used. The results were statistically analyzed by ANOVA and the Tukey test (p < 0.05). All the paints underwent chromatic alteration. The oil paint presented the highest resistance to accelerated aging.

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.

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Prosthetic eyes are artificial substitutes for the eyeball, made of heat-curing acrylic resin, serving to improve the esthetic appearance of the mutilated patient and his/her inclusion in society. The aim of this study was to assess the flexural strength of two heat-curing acrylic resins used for manufacturing prosthetic eyes. Thirty-six specimens measuring 64 x 10 x 3.3 mm were obtained and divided into four groups: acrylic resin for artificial sclera N1 (Artigos Odontológicos Clássico, São Paulo, SP, Brazil), heat-cure water technique (GI) and microwave-cured (GII); colorless acrylic resin for prosthetic eyes (Artigos Odontológicos Clássico, São Paulo, SP, Brazil), heat-cure water technique (GIII) and microwave-cured (GIV). Mechanical tests using three point loads were performed in a test machine (EMIC, São José dos Pinhais, PR, Brazil). The analysis of variance and the Tukey test were used to identify significant differences (p < 0.01). Groups GII and GIV presented, respectively, the highest (98.70 +/- 11.90 MPa) and lowest means (71.07 +/- 8.93 MPa), with a statistically significant difference. The cure method used for the prosthetic eye resins did not interfere in their flexural strength. It was concluded that all the resins assessed presented sufficient flexural strength values to be recommended for the manufacture of prosthetic eyes.

Aim The aim of this report is to describe a quick and simple method of positioning retention magnets when deformed patients are rehabilitated with an oculopalpebral prostheses attached to a maxillary denture/obturator. Background In patients with deformities requiring complex rehabilitations, the use of magnets is the most efficient means of providing combined prostheses with retention quality and stability. Usually prostheses with magnets are in sections and have a magnet in each section. When the sections are put together properly, the magnets are attracted to each other and retain the sections. Report An edentulous patient presented for a post-surgical evaluation of a maxillofacial prosthesis used to repair a partial maxillectomy and left orbital exoneration which removed all adjacent tissues leaving an open communication between the oral, nasal, and orbital cavities. The proposed treatment plan included construction of a maxillary complete denture with a palatal obturator and a mandibular complete denture. Magnets were used to attach the oculopalpebral prosthesis to the maxillary denture/obturator. Summary Use of retention magnets simplify the clinical and laboratorial phase, retains the denture, and makes it stable and comfortable for the patient. This treatment is one successful approach to the restoration of oral function and increases the patient's quality of life. Citation Goiato MC, Fernandes AÚR, dos Santos DM, Barão VAR. Positioning Magnets on a Multiple/ Sectional Maxillofacial Prosthesis. J Contemp Dent Pract 2007 November; (8)7:101-107.

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A peri-implantite é um processo inflamatório que afeta os tecidos ao redor de um implante osseointegrado em função, resultando na perda do osso de suporte. Uma técnica de limpeza aceitável deve ser capaz de desbridar e desintoxicar a superfície sem traumatizá-la. Sendo assim, o objetivo da presente revisão de escopo é avaliar se a ozonioterapia é eficaz no tratamento da peri-implantite. Para isso, o estudo utilizou o acrônimo PICOS. Foram incluídos estudos pré-clínicos in vivo em seres humanos, e clínicos que avaliaram a eficácia do tratamento da peri-implantite com ozônio. As buscas foram realizadas nas bases de dados PubMed, Embase, Scopus e Cochrane Library, e como literatura cinzenta foi realizada uma pesquisa no Google Scholar. Foi utilizada a estratégia de busca “"Ozone" AND ("Peri-Implantitis" OR "Dental Implants" OR "Peri-implant")”. O gerenciamento das referências foi realizado no software gerenciador de referência EndNote Basic. A ferramenta Cochrane foi utilizada para avaliar o risco de viés dos estudos que foram incluídos. Os resultados de todos os estudos foram descritos de forma narrativa. A presente revisão contou com a inclusão de três artigos. Foi possível constatar a redução significativa de todos os parâmetros clínicos analisados nos grupos ozônio, exceto a recessão de mucosa, que apresentou nenhuma ou mínima melhoria. Através dos resultados da presente revisão, foi possível concluir que a terapia de ozônio possui grande potencial para o tratamento da peri-implantite, apesar da alta heterogeneidade e a baixa qualidade dos estudos inseridos não permitirem uma evidência de alta qualidade.