A hemispherical contact model for simplifying 3D occlusal surfaces.

Area of Science:

• Dental Mechanics
• Biomechanical Engineering
• Virtual Articulation

Background:

• Dental articulators simulate mandibular movements and occlusal contacts.
• The ability of virtual articulators to provide comprehensive occlusal and condylar data remains unclear.

Purpose of the Study:

• To evaluate occluding surfaces on dental casts using a hemispherical contact model.
• To test both models by digitizing the Dentatus ARL dental articulator for in vitro analysis.

Main Methods:

• Photogrammetry and structure from motion were used to scan dental casts and a Dentatus ARL articulator.
• Computer-aided engineering and finite element analysis calculated contact points and action vectors.
• Kruskal-Wallis test analyzed differences across three condylar inclinations and model types.

Main Results:

• Action vectors were calculated for cast and hemispherical models to assess mechanical consequences and similarity.
• No significant differences were found in action vectors between the dental cast and hemispherical models across various condylar inclinations.
• Analysis included dental casts, hemispherical models, and right/left condylar locations.

Conclusions:

• The study provides graphical data to guide dental professionals in modifying occlusal contacts.
• This information assists in achieving condylar and balanced centric occlusion.
• Virtual articulation models show promise in replicating real-world occlusal dynamics.