| 摘要 |
A ligation device for use with an orthodontic appliance having individual brackets attached to a patient's teeth and an arch wire received within a slot of each of the brackets. The ligator is formed of an elastomeric material and includes an O-ring portion surrounding a central area and an integral membrane covering the central area. The O-ring portion is adapted to stretch over hook shaped projections on the bracket for producing a continually acting tractive force that urges the arch wire against the bracket. The membrane has a diameter equal to or less than the outermost diameter of the O-ring portion so that, when the ligator is attached to the bracket, the membrane is pulled tight and the prongs and slot are concealed from view. An ornamental design or indicia on the outer face of the membrane is visibly exposed to provide an aesthetically appealing and fashionable appearance. The ligator is provided in multiple colors, with any of a variety of ornamental designs, symbols and/or indicia on the outer membrane face, for selective arrangement and exchange according to patient preference.
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