Advantages of Lingual Treatment with Incognito™
Appliance system fabricated to deliver individually defined treatment objectives
To begin an Incognito therapy it is necessary to take a two-phase impression. High quality impressions are extremely important to ensure a high quality appliance. The plaster models produced from this impression are used to prepare an individualized therapeutic setup that is created by cutting the teeth and setting them up in to the target position in wax.
An articulator and a wax bite are used to simulate the correct jaw relationship.
A high-resolution optical 3D scanner permits non-contact scanning of the therapeutic setup. The result of the scan is a 3D digital representation of the teeth consisting of many thousands of minute triangles that can be documented and processed in the computer
.Model made out of virtual triangles
Creating Individualized Bracket Bases
Specialized CAD/CAM software is used to design and build customized brackets. The fabrication process begins with the creation of individualized bases being customized to the lingual surfaces of the patient’s teeth. Because of the extreme accuracy of the scan, the bases mold precisely to the teeth. Large pad surfaces provide greater bond strength and make them easy to place on the teeth for bonding and re-bonding.
Positioning the Bracket Bodies
After the design of the bracket bases, the appropriate bracket bodies are selected from the digital archive and arranged by the software. The vertical height, angulations and torque are preset into each bracket. In this way the patient’s individual prescription is designed into the brackets.
Each wing is adjusted to make the bracket profile as low as possible while allowing room for elastics to be attached to the bracket.
The individualized brackets conform to the dental anatomy.
Complete set of brackets on the virtual malocclusion model
Complete set of brackets with archwire progression
Wax patterns of the customized brackets are created using rapid prototyping machines. The patterns are then placed in an investment cast, burned out and a dental gold alloy is poured into the cast to create the brackets. After casting the brackets are tumbled and polished until they are smooth to ensure high patient comfort.
Indirect bonding trays are made from the model
The wire geometry is calculated by the CAD/CAM program and then sent to a machine for fabrication. Each wire in the sequence has the same geometry targeted to the final position of the teeth.
Computer designed wire
Wire bending robot
The result of using these technologies, the Incognito™ Lingual Bracket System, is a highly precise and 100% customized set of braces designed for high patient comfort and optimal results.