As the COVID-19 pandemic spreads around the world, professionals must prepare for an increase in severely ill patients. Considering that professionals who perform oral care, especially the oral health team, is the most exposed to SARS-CoV-2, and that saliva can be the main vector in the transmission from person to person, it is essential that they are supported by the best evidence for their performance with risk reduction. In view of the literature, the clinical studies of COVID-19 do not often describe oral symptoms, and it is still uncertain whether these manifestations may be a typical clinical pattern resulting from direct SARS-CoV-2 infection or a systemic consequence, given the possibility of co-infections, impaired immune system and adverse drug reactions. As the prevalence of clinical manifestations is still unknown, the possible manifestations of COVID-19 in the oral cavity has been considered of wide and current interest. Therefore de aim of this study was to report a case series of oral lesions in patients infected with SARS-CoV-2.
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mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} --> <!--[endif]--><span style="font-size: 11pt; font-family: ">O objetivo desta pesquisa foi<span style="color: red;"> </span>estudar a prevalência da leishmaniose tegumentar americana com repercussão na cavidade bucal, no município de Alagoa Grande (Paraíba), no período compreendido entre 1996 e 2004. Foi utilizada, para a pesquisa, a verificação das fichas clínicas da Leishmaniose Tegumentar, na Secretaria da Saúde da referida cidade, onde se observou a existência ou não de repercussão nasobucofaríngea. 53 pacientes apresentaram Leishmaniose Tegumentar Americana, 64% eram do sexo masculino, na faixa etária entre 20 e 24 anos e mais de 65 anos; 45,16% eram analfabetos, 96,2% apresentaram lesões cutâneas, 3,8% lesões na mucosa, 3,8% apresentaram repercussões bucais, 100% realizaram a Intradermorreação de Montenegro para confirmar o diagnóstico clínico, e 61,29% faziam uso de antimonial penta valente. O índice de prevalência mucoso foi de 0,67 casos para cada 10.000 habitantes. Concluiu-se que estudos de prevalência demonstram a real situação da epidemiologia no país, havendo a necessidade de os cirurgiões-dentistas observarem as características regionais de cada afecção como forma de melhor diagnosticá-las. A Leishmaniose Tegumentar no município de Alagoa Grande, Paraíba, demonstra bem essa necessidade, devido às suas características epidemiológicas.</span>
TiO 2 nanotube-containing glass ionomer cements display reduced aluminum release rates Abstract: Titanium dioxide nanotubes (TiO 2 -nts) were incorporated into a glass ionomer cement (GIC) with improved mechanical properties and antibacterial activity. The aims of the present in vitro study were to define the elemental characterization, aluminum (Al) release rate, and initial working time for GIC reinforced with TiO 2 -nts, in an experimental caries model. TiO 2 -nts were incorporated into GIC powder components at 5% by weight, and compared with unblended GIC. Experimental approaches used energy-dispersive spectrometry (EDS), atomic absorption spectrophotometry (AAS), and brightness loss to define surface element properties, Al release rates, and initial working time, respectively. Statistical analysis was performed by 2-way ANOVA, Tukey's test, generalized linear models, and Student's t test (a = 0.05). EDS data analysis revealed that TiO 2 -nts incorporated into GIC had no significant impact on the typical elemental composition of GICs in an in vitro caries model. Regarding the demineralizing solution, GIC with TiO 2 -nt significantly decreased the Al release rate, compared with the control group (p < 0.0001). Moreover, TiO 2 -nt incorporated into GIC did not alter the initial working time of the material (p > 0.05). These findings add information to our scientific body of knowledge concerning the potential impact of TiO 2 -nt on the performance of conventional GICs.
This study compared the acquisition protocols of the Conical Beam Computed Tomography (CBCT) system, to assess the influence on image accuracy by different voxel sizes and the presence of soft tissue. Tomographic acquisition was performed in a fresh (F) and dry (D) pork jaw with voxel sizes of 0.4, 0.3 and 0.25 mm. The gold standard was obtained by scanning dry jaws covered with barium sulfate with a voxel size of 0.25 mm. The images were treated in the MIMICS® program, and noise areas were removed manually, using a fixed threshold for the purpose of generating 3D printing windows. Each window was virtually overlaid with the gold standard using the MeshLab software, obtaining absolute error values between the meshes, generating a map of discrepancies. Significant differences were found between windows D 0.30 vs. F 0.30, D 0.30 vs. F 0.25, D 0.30 vs. D 0.25, D 0.30 vs. F 0.40, F 0.30 vs. D 0.25, F 0.25 vs. D 0.25, F 0.25 vs. D 0.40, D 0.25 vs. F 0.40, D 0.25 vs. D 0.40 and F 0.40 vs. D 0.40, (p <0.05). It was observed that the dry jaw windows showed a lower mean and standard deviation when compared to the fresh jaw windows. The 0.25 mm voxel protocol showed the most accurate result and the presence of soft tissues influenced the accuracy of the image when some protocols were compared statistically.
This study assessed whether the use of digital image filters influences the detection of temporomandibular joint (TMJ) bone changes on cone beam computed tomography (CBCT). Two radiologists evaluated the TMJ images of CBCT scans to verify the presence of osteophytes, erosions, pseudocysts, bone sclerosis and flattening, using the software XoranCAT®; each image of the TMJ was assessed with and without the use of the following filters: Angio Sharpen 3x3 and Angio Sharpen 5x5. Kruskal-Wallis’ test was used to assess whether the application of filters influenced the scores assigned to the degenerative bone changes in the condyle. Flattening was present in 15 cases (51.72%), followed by osteophytes in six cases (20.69%), sclerosis in three cases (10.34%), and erosion in three cases (10.34%), with pseudocyst found in two cases (6.90%). No statistically significant difference was found in the scores (P = 0.786) regarding the original images and those treated with both filters. Digital image filters used in our study did not influence the diagnosis of degenerative bone changes in the TMJ on CBCT images.
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