Smart Flexible 3D Sensor for Monitoring Orthodontics Forces: Prototype Design and Proof of Principle Experiment

Area of Science:

• Biomedical Engineering
• Orthodontics
• Materials Science

Background:

• Accurate measurement of orthodontic forces is crucial for effective treatment.
• Current methods lack precision in quantifying forces exerted by orthodontic brackets and aligners.
• Optimizing force application can improve treatment outcomes and reduce costs.

Purpose of the Study:

• To propose and validate a novel principle for orthodontic force measurement using an elastic semi-sphere sensor.
• To investigate the technical feasibility and sensor performance when integrated with orthodontic aligners or directly on teeth.
• To establish the relationship between applied force and sensor deformation for accurate readings.

Main Methods:

• Development of a finite element (FE) model to analyze the semi-sphere sensor's response to force.
• Manufacturing of a prototype semi-sphere sensor using thermoplastic polymer (3 mm diameter).
• Experimental verification of force detection by measuring changes in the sensor's contact area with a portable microscope.

Main Results:

• The finite element model established a correlation between force magnitude and contact area change.
• Experimental validation confirmed the prototype's ability to detect applied forces.
• The semi-sphere sensor demonstrates potential for accurate orthodontic force tracking.

Conclusions:

• The proposed elastic semi-sphere sensor offers a viable method for real-time orthodontic force measurement.
• This technology can inform critical decisions regarding aligner replacement timing.
• Future iterations may involve sensor arrays for directional force analysis, enhancing treatment precision.