T-helper cell type 17/regulatory T-cell immunoregulatory balance in human radicular cysts and periapical granulomas.

Introduction: Cysts and granulomas are chronic periapical lesions mediated by a set of inflammatory mediators that develop to contain a periapical infection. This study analyzed the nature of the inflammatory infiltrate, presence of mast cells, and in situ expression of cytokines (interleukin [IL]-17 and transforming growth factor [TGF]-beta), chemokines (macrophage inflammatory protein [MIP]-1beta and monocyte chemotactic protein [MCP]-1), and nuclear transcription factor (FoxP3) in human periapical granulomas and cysts compared with a control group.

Methods: Fifty-five lesions (25 periapical cysts, 25 periapical granulomas, and 5 controls) were analyzed.

Method to evaluate inflammatory root resorption by using cone beam computed tomography.

Introduction: The aim of this study was to evaluate a method to measure inflammatory root resorption (IRR) by using cone beam computed tomography (CBCT) scans.

Methods: IRR sites were classified according to root third and root surface, and IRR extension was measured on the axial, transverse, and tangent views of 3-dimensional CBCT scans by using the Planimp software. A 5-point (0-4) scoring system was used to measure the largest extension of root resorption.

External multiple invasive cervical resorption with subsequent arrest of the resorption.

A rare, the uncommon, case of multiple invasive cervical resorption (MICR) with subsequent arrest of the resorption involving eight teeth of the mandible (tooth 46 to tooth 32) is presented. This case is noteworthy because of the characteristics of its clinical evolution. There have only been a few cases in the literature were found presenting involvement of such a large number of teeth.