OH-IS Meeting
Dr. Giorgio Fiorelli
Limits and Inconsistencies of Standard Orthodontic Mechanics and Strategies to Overcome Them.
Standard appliances, including the use of conventional twin or self-ligating brackets and continuous archwires, are used in the great majority of orthodontic therapies. The reason for the large diffusion of such approaches is related to the ease of learning of these techniques: in fact, they are based on what can be considered a recipe system. Cases are divided into categories and subcategories (i.e. class II, crowding, high angle) and a sequence of materials and actions is prescribed for each of these. The idea is that the bracket prescription, where all the supposedly needed information is included in the bracket, will lead in any case to the ideal final position of the teeth.
Unfortunately, the standard approach to the orthodontic treatment has several shortcomings, mainly due to the great variability of orthodontic problems, that makes every case different from another. Therefore, the recipe approach has to be considered a reasonable compromise in many cases, where also growth and function contribute to the success of the therapy, whereas in many other cases, with a higher level of complexity, the standard approach may lead to unpredictable and undesired results. In these cases, a more individualized therapy should be used where a specific and detailed analysis of problems and individualized treatment planning and mechanics design are performed.
In this presentation, we will show some failures in the use of standard techniques and we will discuss how it is possible to avoid side effects and make the therapy outcomes more predictable, with the use of a rational and individualized mechanics.
This different approach, based on the deep knowledge of orthodontic biomechanics, ultimately raises the limits of orthodontic therapy and allows for the controlled treatment of very complex cases.
You will learn.
- The basic concepts of statically indeterminate mechanics
- Burstone’s 6 geometries.
- The role of friction in dental movement determination
- How inconsistencies are generated using a continuous archwire
- The “Force Driven” mechanics as an alternative to “Shape Driven”
- Force System and Dental Movement
- Anchorage Analysis
- Mechanics Design Examples for Statically determinate Appliances with Clinical Cases.