OCTA concept: Occlusal architecture to secure orthodontic or prosthodontic adults treatments (part 1)

Prosthetic failure is often occlusal, orthodontic recurrence is often dysfunctional; the prognosis improvement of the treatments, is related to the optimization of the occlusal functions (stabilizing, centering, guiding). The occlusal requirement of the implant-supported prosthesis is greater than traditional fixed prosthesis. Optimal occlusion control does not necessarily always imply the use of a complex set of instruments. On the contrary, the methodology must be simple, but rigorous and fair; fair means to adapt the tool to the objectives. Therefore it is essential, prior to the therapeutic action, to precisely define objectives and occlusal architectural criteria. The principles must be very clear. The difficulty lies more in the decision process than in the action. Once the therapeutic decision is made, the choice of the protocols of realization becomes obvious: it falls under simple rules, intangible, reproducible. Using the same decision making process for both simple cases and complex situations can greatly increase the reliability and success.

Introduction
Determinants of the reconstructions and necessity of an architectural guideline
Height occluso-architectural criteria of construction
1. Choose and record the reference plane
2. Choose and record the reference position
3. Choose and record the therapeutic position including vertical dimension of occlusion
4. Choose the situation (position and inclination) of the mandibular anterior teeth
5. Choose the situation (position and inclination) of the maxillary anterior teeth
6. Choose the radius of the curve of Spee and then the inclination of the occlusal plane
7. Choose the inclination of the cusp guiding slopes
8. Choose the guidance concept and radius of curves of Wilson
Transfer wax-up into a second generation provisional reconstruction
Conclusion