Viscoelastic properties of elastomeric chains: an investigation of pigment and manufacturing effects.

Introduction: Orthodontic elastomeric chains are commercially available in various colors from many manufacturers. In this study, we investigated the viscoelastic properties of elastomeric chains using dynamic mechanical analysis to perform color and brand comparisons.

Methods: Ten colors of Sunburst chains (GAC International, Bohemia, NY) were selected for the color study.

The Americleft study: an inter-center study of treatment outcomes for patients with unilateral cleft lip and palate part 4. Nasolabial aesthetics.

Objective: To compare the nasolabial aesthetics for individuals with nonsyndromic complete unilateral cleft lip and palate between the ages of 5 and 12 years.

Design: Retrospective cross-sectional study.

Setting: Four cleft centers in North America.