Combined catalytic strategies applied to in-office tooth bleaching: whitening efficacy, cytotoxicity, and gene expression of human dental pulp cells in a 3D culture model.

Objectives: To evaluate the feasibility of using a 3D model with human dental pulp cells (HDPCs) to compare bleaching therapies and assess whether coating enamel with a nanofiber scaffold (NS) and polymeric catalyst primer (PCP), combined with violet LED (LEDv) irradiation, enhances bleaching efficacy (BE) and reduces cytotoxicity (CT).

Materials And Methods: After using NS + PCP to cover enamel of enamel/dentin discs adapted to artificial pulp chambers containing 3D culture with HDPCs, a bleaching gel with 35%HO was applied and then irradiated with LEDv. The following groups were established (n = 8): NC - no treatment; PC- 35%HO for 45 min, and EXP: NS + PCP + 35%HO + LEDv for 15 min.

Enhancing societal security: a multimodal deep learning approach for a public person identification and tracking system.

In public spaces, threats to societal security are a major concern, and emerging technologies offer potential countermeasures. The proposed intelligent person identification system monitors and identifies individuals in public spaces using gait, face, and iris recognition. The system employs a multimodal approach for secure identification and utilises deep convolutional neural networks (DCNNs) that have been pretrained to predict individuals.

[Aerosol therapy in asthma].

Today there is a general use of aerosols in the treatment of asthma. To understand their importance it is necessary to know the make-up of an aerosol, physical and chemical factors as well as anatomical factors that influence its deposition and clearance in the tracheo-bronchial tree. In the therapy of asthma, small, easy-to-handle and reliable inhalers are prescribed.