Guided intentional replantation of a mandibular premolar with type IIIIb dens invaginatus associated with peri-invagination periodontitis without root canal treatment- A case report.

Aim: This report highlights successful management of a rare case of a mandibular premolar with Oehler's Type IIIb Dens Invaginatus (DI) and peri-invagination periodontitis with guided intentional replantation (IR) without root canal treatment.

Methods: A 22-year-old female patient reported with discomfort and a sinus tract associated with tooth #21. Clinical examination and cone beam computed tomography revealed tooth #21 had an Oehler's Type IIIb DI with peri-invagination periodontitis.

A laboratory study to assess the physico-chemical properties of BioRoot RCS and BioRoot Flow exposed to citric acid and EDTA irrigating solutions.

Objective: To assess physico-chemical properties of BioRoot RCS (powder-to-liquid formulation) and BioRoot Flow (pre-mixed formulation) after exposure to citric acid (CA) and EDTA.

Methods: BioRoot RCS and BioRoot Flow specimens (5 × 2 mm) were incubated for 28 days at 37 °C before being treated with test solution (distilled water, 17% EDTA, 10% CA, 20% CA or 40% CA). Changes in mass, ion release (inductively coupled plasma optical emission spectroscopy), phase composition (X-ray diffraction and Raman spectroscopy), surface morphology (scanning electron microscopy and energy dispersive spectroscopy) were evaluated.

Endodontic access with different computer navigation systems in calcified root canals.

Background: A range of computer-aided navigation techniques to aid endodontic access cavity preparation have been developed. The aim of this study was to analyze the accuracy of access cavities prepared with the aid of computer-aided static navigation (SN), computer-aided dynamic navigation (DN), and navigation based on augmented reality (AR) compared with a conventional freehand (FH) method in extracted mandibular teeth with calcified root canal systems.

Methods: Forty single-rooted mandibular teeth were divided into 4 groups, and preoperative cone-beam computed tomographic scans and digital impressions through an intraoral scan were obtained.

Per- and Polyfluoroalkyl Substances in the Duluth, Minnesota Area: Exposure to and Biomarker Responses in Tree Swallows Relative to Known Fire-Fighting Foam Sources.

Tree swallow nest boxes were deployed at sites proximal to two putative aqueous film forming foam (AFFF) sources in the Duluth, MN area, as well as along the St. Louis River and a reference lake for comparative purposes in 2019, 2020 and 2021. The two AFFF sites were the current Duluth Air National Guard Base (ANG) and the Lake Superior College Emergency Response Training Center.