[Clinical management of calcified root canal with Mtwo NiTi files].

Purpose: To evaluate the effect of Mtwo NiTi files in the management of calcified root canals.

Methods: Thirty-five calcified root canals from 21 cases unsuccessfully prepared with C-Pilot files and EDTA were treated with Mtwo NiTi files and EDTA. The data was analyzed with SAS 9.

Effects of deferoxamine on the repair ability of dental pulp cells in vitro.

Introduction: In previous studies, we found that hypoxia promoted the mineralization of dental pulp cells (DPCs). However, the clinical application of hypoxia as a therapy is questionable or unfeasible. Deferoxamine (DFO), a medication for iron overload, has also been shown to induce hypoxia.

[Clinical study on the effects of single visit root canal treatment of chronic periapical periodontitis by two kinds of root canal preparation instruments system].

Purpose: To investigate the different incidence of postoperative pain and long-term follow-up curative effects in patients with chronic periapical periodontitis undergoing single visit root canal treatment by two kinds of canal preparation instruments system.

Methods: Ninety-eight permanent teeth with chronic periapical periodontitis were divided into two groups randomly. One group was prepared with nickel-titanium instruments, the other group was prepared with K files.