Aim: The aim of this study was to compare and evaluate the retrieval time, efficiency, and loss of dentin volume after separated instrument retrieval using three different file retrieval systems in the middle and apical thirds of the mesio-buccal root of maxillary first molars.
Material And Methods: Sixty maxillary first molars were selected. Group 1: Endo Rescue Apex, Group 2: Ultrasound apex, Group 3: Broken instrument remover apex, Group 4: Endo Rescue Middle, Group 5: Ultrasound Middle, Group 6: Broken instrument Remover middle were used to retrieve the fractured reciprocating files from the root canals.
Background: To optimize a novel composite scaffold comprising of nano phosphorylated pullulan incorporated carboxymethyl chitosan (nPP-CMC) and to evaluate its cell viability and proliferation in human dental pulp stem cells (hDPSCs).
Methodology: Nano phosphorylated pullulan (nPP) in concentrations of 200 mg, 400 mg, 600 mg, 800 mg, and 1 g was vortexed in 20 mL of distilled water, followed by 30 mins of ultrasonication for even dispersion. 1 g of CMC was added to each nPP mixture, blended for 1 hour to form a hydrogel, and freeze-dried for 18 hours at -20°C to yield nPP-CMC scaffolds in ratios of 1:5, 2:5, 3:5, 4:5, and 1:1.
Aim: This study aims to analyze the fatigue resistance, surface mechanical properties, and biomechanical responsiveness of microtissue-engineered root dentin using cellulose nanofibers, hydroxyapatite nanocrystals, and walnut shell nanopowders.
Methodology: The objectives are to evaluate the differences in fatigue resistance and biomechanics and surface mechanical characteristics by infiltrating these nanomaterials into the root canal of endodontically treated teeth. Forty human permanent single-rooted teeth were collected with the patient's consent.