Asian couples in negotiation: a mixed-method observational study of cultural variations across five Asian regions.

The purpose of this study was to explore variations in how contemporary couples from five different Asian regions negotiate disagreements. Video recordings of 50 couples (10 each from Japan, Korea, Mainland China, Taiwan, and Hong Kong) discussing unresolved disagreements provided raw data for quantitative and qualitative analyses. First, teams of coders from each region used a common protocol to make quantitative ratings of content themes and interaction patterns for couples from their own region.

[Effect of different orthodontic interproximal reduction methods on the enamel].

Purpose: To find a suitable interproximal enamel (IER) reduction method for clinical use by pH cycles in vitro.

Methods: 50 human premolars extracted for orthodontic reasons were collected for the experiment. After removal of the roots, the crowns were split vertically into two halves with wafer-thin wheel blade.