Robotic chewing simulator for dental materials testing on a sensor-equipped implant setup.

Area of Science:

• Biomaterials science
• Dental materials engineering
• Biomechanics

Background:

• Dental restorations must withstand masticatory forces.
• Accurate simulation of chewing forces is crucial for material testing.
• Existing methods may not fully replicate complex 3D mandibular movements.

Purpose of the Study:

• To describe and validate a novel 3D mechanical chewing simulator.
• To assess the device's ability to reproduce masticatory forces.
• To evaluate the simulator's utility in testing restorative materials.

Main Methods:

• A mechanical chewing robot was developed to simulate 3D mandibular movements.
• Three restorative materials (acrylic resin, composite resin, glass ceramic) were tested.
• Samples underwent simulated chewing; forces on peri-implant bone were measured.
• Two-way ANOVA was used for statistical analysis.

Main Results:

• Significant differences in stress transmission were observed between the tested restorative materials (P < .0001).
• The chewing simulator successfully identified these material-specific differences.
• Low variation in results confirmed the machine's precision and repeatability.

Conclusions:

• The elastic moduli of restorative materials significantly influence stress at the bone-implant interface.
• The validated masticatory robot reliably differentiates material responses to chewing forces.
• The simulator demonstrates high precision and repeatability for dental material testing.