Accuracy evaluation of bracket repositioning by indirect bonding: hard acrylic CAD/CAM versus soft one-layer silicone trays, an in vitro study.

Objectives: Rapid development of digital technologies and 3D printing provide new tools for orthodontic indirect bonding. The purpose of this in vitro study is to evaluate the clinical acceptability of hard CAD/CAM indirect bonding tray.

Material And Methods: Ten soft silicone transfer trays and ten hard CAD/CAM trays were produced, and 200 brackets were placed on them.

A fast and versatile method for spectral emissivity measurement at high temperatures.

In this paper, the development of a new device for high temperature emissivity measurement is described. This device aims at measuring both spectral and total emissivity for a thermal range of 600-1000 °C. The main targeted properties of this device are versatility and simplicity.