Preoperative CT-based intra- and peri-tumoral radiomic models for differentiating benign and malignant tumors of the parotid gland: a two-center study.

Objective: To investigate the ability of intra- and peritumoral radiomics based on three-phase computed tomography (CT) to distinguish between malignant and benign parotid tumors.

Methods: We conducted a retrospective analysis of data from 374 patients with parotid gland tumors, all confirmed by histopathology. A total of 321 patients from Center 1 (January 2014 to January 2023) were randomly divided into the training set and internal testing set at a ratio of 7:3, whereas 53 patients from Center 2 (January 2020 to June 2022) constituted the external testing set.

[Effect of calcium on proliferation, migration and osteogenic differentiation of human dental follicle cells].

Purpose: To determine the role of Ca in proliferation,migration and osteogenic differentiation of human dental follicle cells(hDFCs).

Methods: hDFCs were isolated and cultured. The source of hDFCs was detected by immunofluorescence staining.