Patent ID: 6935858

Claim:
An orthodontic force module made of an elastomeric material and having a longitudinal axis, the force module comprising: an eyelet segment having an opening, a first section and a second section, wherein the first section and the second section extend along respective paths located on opposite sides of the opening, each of the first section and the second section having a certain cross-sectional area in directions perpendicular to its respective path; and a connector segment coupled to the eyelet segment and having a certain cross-sectional area in directions perpendicular to the longitudinal axis of the force module, wherein the total area of the certain cross-sectional areas of the first section and the second section is in the range of about 80% to about 120% of the cross-sectional area of the connector segment when the force module is relaxed, wherein the opening has a generally parallelogram-shaped configuration, and wherein the opening has at least one rounded interior corner.