Estudo comparativo entre limites radiográfico e histológico em ameloblastomas

The aim of this study was to analyse the presence of histological infiltrations of neoplastic cells within the bone, and compare the distance of these infiltrations with the radiografic limits of the ameloblastoma. For this purpose, six integral surgical samples, with identifiable radiographic limits of the tumor, sent to the Pathology Service of Dental School of the Federal University of Rio Grande do SuÌ, were processed. From the resuÌts obtained, can be concluded úat, alúough ameloblastoma presents well-defined radiographic limits, it is infiltrative from the histological view point. Infiltrations occurs at few and distinctive sites. varying in this study from 0.10 cm to 1.40 cm, related to the radiographic borders of the neoplasm.Com o objetivo de observar a presença e comparar a distância, entre as infiltrações de células neoplásicas no osso e o limite radiográfico em ameloblastomas, foram selecionadas seis peças cirúrgicas enviadas ao Laboratório de Patologia Bucal da UFRGS, que apresentavam-se íntegras e com os limites do tumor radiograficamente identificáveis, sendo estas submetidas a exames radiográficos e cortes histológicos seriados. A partir dos resultados obtidos podemos concluir que, apesar do ameloblastoma apresentar radiograficamente limites definidos é histologicamente infiltrativo. Estas infiltrações ocorrem em poucos e distintos locais, variando, neste estudo, de 0,1 cm a 1,4 cm da extremidade radiográfica do neoplasma

Estudo comparativo entre limites radiográfico e histológico em ameloblastomas

The aim of this study was to analyse the presence of histological infiltrations of neoplastic cells within the bone, and compare the distance of these infiltrations with the radiografic limits of the ameloblastoma. For this purpose, six integral surgical samples, with identifiable radiographic limits of the tumor, sent to the Pathology Service of Dental School of the Federal University of Rio Grande do Sul, were processed. From the results obtained, can be concluded that, although ameloblastoma presents well-defined radiographic limits, it is infiltrative from the histological view point. Infiltrations occurs at few and distinctive sites, varying in this study from 0.10 cm to 1.40 cm, related to the radiographic borders of the neoplasm.Com o objetivo de observar a presença e comparar a distância, entre as infiltrações de células neoplásicas no osso e o limite radiográfico em ameloblastomas, foram selecionadas seis peças cirúrgicas enviadas ao Laboratório de Patologia Bucal da UFRGS, que apresentavam-se íntegras e com os limites do tumor radiograficamente identificáveis, sendo estas submetidas a exames radiográficos e cortes histológicos seriados. A partir dos resultados obtidos podemos concluir que, apesar do ameloblastoma apresentar radiograficamente limites definidos é histologicamente infiltrativo. Estas infiltrações ocorrem em poucos e distintos locais, variando, neste estudo, de 0,1 cm a 1,4 cm da extremidade radiográfica do neoplasma

Exploring digital filters for internal root resorption : how can we improve the diagnosis of small lesions?

Objectives: This study aimed to evaluate the impact of enhancement filters in detecting small simulated internal root resorptions (IRR). Methods: Forty-two extracted human teeth were sectioned, connected, and stored in a dry human jaw and X-rayed with photostimulable phosphor plates (PSPs), composing the control group (CG). In the middle-third of the root canals, IRR lesions were simulated using Da Silveira protocol. Later, the specimens were X-rayed to create the test group (TG). All images acquired were exported with seven enhancement filters plus the original image. Three examiners used a five-point Likert scale to evaluate the images regarding the presence/absence of IRR. Diagnostic efficacy was assessed from sensitivity and specificity results. Comparison among filters was performed by using receiver operating characteristic (ROC) curve analysis. Results: Moderate values of Kappa interexaminer (0.403–0.620) and high values of Kappa intraexaminer (0.757–0.915) were observed. The best performance occurred in the CG (p < 0.05). Original images presented the greatest sensitivity and area under the ROC curve (0.595–0.750), while the Endo filter presented the greatest specificity (0.952). Inversion and Pseudo-3D images produced the greatest doubt in the diagnosis, significant for CG with the Pseudo-3D filter (p < 0.05). Conclusions: The Original and ‘Endo’ filters should be chosen as it offers greater diagnostic ability and allows more confidence during the evaluation