INTRODUCTION: The inclination of the occlusal plane is one of the determining factors in the success of a prosthetic rehabilitation, making it aesthetically pleasing. PURPOSE: The aim of this study is to measure the differences in perception between Laypeople, Dental Students and Dentists according to discrepancies in anterior and/or posterior occlusal plane inclination regarding to the corresponding facial landmarks, as well as gender and age. METHODS: Observational Cross-Sectional study with a survey applied to 3 different populations: Dentists, Dental Students and Laypeople. Two groups of symmetrical facial images were created for female and male gender. In the first group the posterior occlusal plane (POP) was modified in 1degree incremental tilts and the position of maxillary central incisors was also changed to follow the inclination of the occlusal plane. In the second group, the POP was modified in the same way and the anterior occlusal plane (POA) remained unchanged. The position of the dental midline was not manipulated. RESULTS: Statistically significant differences were found between the three study populations (p < 0.05). The group of Dentists was the one that stood out the most, showing a higher rate of success identifying changes in the occlusal plane. Gender did not prove to be a variable that caused statistically significant changes, about differences between the evaluations assigned. In the age analysis, there were statistically significant results, especially in the elderly age group, which demonstrated a lower rate of perception for changes. CONCLUSION: The level of knowledge and the age of the viewer proved to be statistically significant in the perception of the different tilts. The gender of the observer and the gender of the model did not influence the aesthetic perception. It is essential that doctors have the necessary tools that allow them to evaluate which approach is the most suitable for an appropriate treatment.
- Occlusal plane
- Mestrado em Medicina Dentária