Cephalometrically predicted occlusal plane: implications in removable prosthodontics

Area of Science:

• Dentistry
• Prosthodontics
• Dental Anatomy

Background:

• Accurate occlusal plane determination is essential for successful removable prosthodontics.
• Current methods lack sufficient guidelines for establishing the occlusal plane.
• The relationship between the occlusal plane and the skeletal base requires further investigation.

Purpose of the Study:

• To test the hypothesis that occlusal plane angulation correlates with the maxillary skeletal base.
• To evaluate the reliability of existing methods for occlusal plane determination in prosthodontics.

Main Methods:

• Statistical analysis of angles between various dental planes (Cook's plane, maxillary plane, occlusal plane, HIP plane, occlusal Frankfort plane).
• Measurement of specific cephalometric points (e.g., ANS, Po, Na).
• Comparison of predicted occlusal planes with clinically determined ones.

Main Results:

• No significant linear correlation was found between occlusal plane angulation and maxillary skeletal base measurements (p > 0.05).
• The occlusal plane and the HIP plane were not parallel, with a mean angular difference of 4.57 degrees.
• No significant correlation existed between predicted and clinically determined occlusal planes (r=0.267, p > 0.05).

Conclusions:

• The angulation of the occlusal plane is not strongly related to the maxillary skeletal base.
• Existing methods for determining the occlusal plane in prosthodontics may lack predictive accuracy.
• Further research is needed to develop reliable guidelines for occlusal plane determination.