Ribbond widths usages: 2mm: Periodontal splints. Bridges. Orthodontic retainers. Composite restorations. Trauma stabilization. 2mm & 3mm: Periodontal splints. Bridges. Composite restorations. 3mm & 4mm: Bridges. Composite restorations. Acrylic applications. -- Orthodontic (1mm): Only for post-orthodontic fixed retainers with ½ mobility or less. This is not used like a wire and must be bonded into contacts. Please call 800-624-4554 to order Orthodontic size. -- Ribbond starter kits include three 22cm lengths of Ribbond (66cm total) and the special scissors for cutting the Ribbond. Ribbond kits include enough material to make approximately 25-30 single pontic, three-unit, lingual bonded anterior bridges, 18-20 canine-to-canine periodontal splints, or 50-80 composite restorations. Ribbond starter kits and refills do not include the Ribbond Wetting Resin or the Ribbond Securing Composite. Those materials are sold separately. The Ribbond-Ultra was introduced in 2013 and is 0.12mm thick. The Ribbond-THM was introduced in 2000 and is 0.18mm thick. Counter intuitively, the Ultra is slightly more fracture tough that the THM. Most dentists prefer the Ribbond-Ultra. Note: Ribbond is made from the same super tough ultra-high molecular weight polyethene fibers used to make bullet proof vests and normal scissors cannot cut Ribbond. We recommend getting a starter kit with the special scissors for a first time order.