Xanthogranulomatous cholecystitis with histologic features suggestive of IgG4 related cholecystitis - A morphologic overlap with IgG4 related disease.

Aims: Both xanthogranulomatous cholecystitis (XGC) and IgG4-related cholecystitis (IgG4-CC) are rare chronic fibroinflammatory tumefactive diseases of the gallbladder, which cause a strong confusion with resectable malignancy in view of their mass forming tendency with extension into the liver. We aim to study the histopathologic features of xanthogranulomatous cholecystitis with regard to IgG4-related cholecystitis in extended cholecystectomy specimens.

Methods And Results: Sixty cases of extended cholecystectomy with liver wedge resection, diagnosed as XGC on histopathology from January 2018 to December 2021 were retrieved from the archives.

When Clinico-Morphological and Molecular Studies Tell Different Stories: A Case of Myelodysplastic Syndrome.

Myelodysplastic syndromes (MDSs) are clonal hematopoietic stem cell disorders characterized by cytopenias, dysplasia in one or more of the major myeloid cell lines, ineffective hematopoiesis, with cellular marrow, and risk for leukemic transformation. We present a case of a 66-year-old male with a history of multiple packed red blood cell (PRBC) transfusions. Routine investigations, bone marrow aspiration, and biopsy were done.

Epstein-Barr Virus-associated Mixed Lymphoepithelioma-like Carcinoma and Adenocarcinoma of the Gall Bladder: An Unusual Entity.

Schmincke described lymphoepithelioma as an undifferentiated carcinoma with abundant lymphoid stroma in the nasopharynx. Tumors with a similar histomorphology in extrapharyngeal areas have been referred to as lymphoepithelioma-like carcinoma (LELC). The association of an Ebstein-Barr virus (EBV) infection with lymphoepithelioma is well established in the nasopharynx but not so well at the extrapharyngeal sites.

On comprehensive analysis of root canal shaping ability of three endodontic files of different kinematics.

Infection of the tooth's root canal requires what is called root canal treatment (RTC). The most important part of endodontic treatment is to shape the root canal and remove its infected portion using endodontic files of various protocols, kinematics and designs that suit the particular geometry. Cleaning and Shaping the canal efficiently remove the root canal bacterial biofilms or tissue remnants while keeping its natural geometry.

Effect of volumetric shrinkage of restorative materials on tooth structure: A finite element analysis.

Post-treatment coronal hermetic seal of the root canal opening prevents the food or saliva which assist to achieve successful endodontic treatment. Gutta-percha is filled in the inner canal, that is, from cervical third to apical third. Gutta-percha does not provide the hermetic seal because it does not bound with dentine walls.

Force and vibration generated in apical direction by three endodontic files of different kinematics during simulated canal preparation: An in vitro analytical study.

During root canal shaping, pain could result from the high level of force or vibration generated. This could be related to file kinematics or geometry. In the present study, a comparison is made between forces and vibrations generated by endodontic files having three different kinematics.

Force and vibration correlation analysis in the self-adjusting file during root canal shaping: An in-vitro study.

Background/purpose: The focus of this study was to find a correlation between the forces and vibrations during root canal shaping. This can be used to predict the fracture of the self-adjusting file (SAF) in root canal shaping.

Materials And Methods: Forty J-shaped resin blocks were used in this study.

Computer-aided design-based guided endodontic: A novel approach for root canal access cavity preparation.

In cases of teeth with unusual morphology like calcified pulp canal, guided endodontic treatment is suggested. An endodontic guide which navigates burs according to a preplanned path is used. Existing approaches of endodontic guide design are based on visual observation and analysis of tomographic scan of teeth.

Preservation of root canal anatomy using self-adjusting file instrumentation with glide path prepared by 20/0.02 hand files versus 20/0.04 rotary files.

Objectives: To compare the relative axis modification and canal concentricity after glide path preparation with 20/0.02 hand K-file (NITIFLEX) and 20/0.04 rotary file (HyFlex™ CM) with subsequent instrumentation with 1.

Assessment of the fracture resistance of teeth instrumented using 2 rotary and 2 reciprocating files versus the Self-Adjusting File (SAF): An ex vivo comparative study on mandibular premolars.

Aim: Current ex vivo study compared fracture resistance of teeth instrumented using 5 endodontic files, filled with Gutta-percha and AH Plus.

Materials And Methods: Sixty freshly extracted, single-rooted mandibular premolars were acquired and decoronated to obtain 15 mm segments. These samples were randomly divided into six groups (n = 10).

Integrating techniques to re-establish dentogingival esthetics.

The aim of this article was to report the clinical case of a male patient of 20 years with hyperpigmented gingiva and moderate fluorosis, whose smile was reestablished by the use of a laser assisted depigmentation procedure, an enamel microabrasion technique, followed by at-home bleaching and subsequent remineralization therapy. The association of these techniques presented excellent results and the patient was satisfied. All techniques are painless, fast and easy to perform, in addition to preserving the hard and soft dental structure.

An insight into neurophysiology of pulpal pain: facts and hypotheses.

Pain and pain control are important to the dental profession because the general perception of the public is that dental treatment and pain go hand in hand. Successful dental treatment requires that the source of pain be detected. If the origin of pain is not found, inappropriate dental care and, ultimately, extraction may result.

Comparing microleakage and layering methods of silorane-based resin composite in class V cavities using confocal microscopy: An in vitro study.

Aims: This in vitro study compared the effects of different layering techniques on the microleakage of silorane-based resin composite using confocal laser scanning microscope.

Materials And Methods: Forty caries free premolars extracted for orthodontic reasons were used. A class V cavity was prepared on the buccal surface in each of the premolars, with the gingival margin of the cavity being 1 mm above cementoenamel junction.