Abstract

Lingual Straight Wire System by Using Square Slot Bracket

by Takemoto Kyoto

The mushroom arch-wire is mainly used in conventional lingual orthodontic treatment but the complicated wire bending it requires affects both the treatment results and the time spent in the chair. Since the inter bracket distance is short, it becomes difficult to control the teeth and there is a tendency that the correction force becomes too strong. In order to control teeth with a proper orthodontic force, we have developed ALIAS with a square slot bracket for precise teeth control with light orthodontic force. With ALIAS there are 3 new concepts. 1. Square slot – less vertical and horizontal play between bracket and wire, allows for precise tooth movement. this allows orthodontists to predict treatment outcomes more accurately. In addition by setting the slot size to .018×.018, treatment can be performed with optimal orthodontic force. 2. Straight wire – treatment employs a plane arch-wire. With brackets bonded accurately and a full size wire the amount of wire bending is very significantly reduced. also, treatment with simple mechanics increases patient comfort 3. Passive self-ligation system – employing a passive ligation system reduces friction and light orthodontic force can be employed. These concepts make for simplified handing from the lingual side, and achieve better treatment. The key areas to which attention must be paid for the best possible treatment using the ALIAS system are: 1. Realistic treatment goal using 3D CT imaging – check the root position and bone thickness to determine the limits of tooth movement. 3D diagnosis enables safer treatment 2. Accurate and realistic set up – based on the 3D diagnosis, a set-up model is created that considers the root position. 3. Accurate bonding system and bonding position – Brackets can be bonded to precise positions by using individual tooth trays. 4. ALIAS 3 concept accurate appliance. 5. Employment of suitable mechanics and orthodontic forces 6. Full size wire control – Square slot allows easy use of full size wire. Torque control can be performed accurately by using full size wire. In this presentation, I will explain in detail of the theory and difficult cases using the ALIAS Lingual straight wire system.

Learning Objectives

After this lecture, you will be able to know Lingual straight wire system
After this lecture, you will be able to know the advantage of square slot
After this lecture, you will be able to know how to treat difficult cases with lingual appliance