An in vitro study of digital impressions and three-dimensional printed models of orbital defects using mobile devices and monoscopic photogrammetry.

Purpose: The purpose of this study was to perform an in vitro evaluation of digital impressions using a mobile device and monoscopic photogrammetry in cases of orbital defects with undercuts.

Methods: Three 10-mm-square cubes were attached to a diagnostic cast of a patient with a right orbital defect. Still images acquired with a mobile device were used to generate facial three-dimensional (3D) data.

Influence of dental abrasives on surface roughness, gloss, and color of titanium.

Purpose: The influence of three dental abrasives on the surface roughness, glossiness, and color of titanium (Ti) after mechanical polishing was investigated.

Methods: The specimens were divided into groups, referred to as SM, SR, and TP, to distinguish the different polishing processes. SM: rubber polishing using a rubber point containing SiC abrasive particles at 20,000 rpm, followed by gloss polishing; SR: rubber polishing using a rubber point containing AlO abrasive particles at 20,000 rpm, followed by gloss polishing; TP: rubber polishing using a rubber point containing TiO abrasive particles at 6,000 rpm, followed by gloss polishing.

Usefulness of personalized three-dimensional printed model on the satisfaction of preoperative education for patients undergoing robot-assisted partial nephrectomy and their families.

Objective: To clarify the usefulness of a personalized three-dimensional (3D) printed model of the kidney for preoperative education among patients who underwent robot-assisted partial nephrectomy (RAPN).

Methods: Twenty-nine cases of patients who planned to undergo RAPN and 19 of their families participated in this study. A three-dimensional model consisting of the kidney, tumors, ureter, inferior vena cava, and abdominal aorta in each case was generated using a Z Printer 450 based on the findings of preoperative enhanced CT.

Human odontogenic epithelial cells derived from epithelial rests of Malassez possess stem cell properties.

Epithelial cell rests of Malassez (ERM) are quiescent epithelial remnants of the Hertwig's epithelial root sheath (HERS) that are involved in the formation of tooth roots. ERM cells are unique epithelial cells that remain in periodontal tissues throughout adult life. They have a functional role in the repair/regeneration of cement or enamel.