Matrix Sensor for High-Resolution Occlusal Force Detection

The sensor sheet is divided into multiple independent sensing elements arranged in a matrix pattern. Each sensing element consists of a pair of electrodes (one on the upper surface, one on the lower surface) that can independently detect occlusal force at its location. This segmentation allows the system to achieve high resolution by combining signals from multiple discrete sensing points, rather than relying on a continuous resistance film with inherent resolution limitations.

The patent replaces the traditional resistance film mechanism with an electromagnetic field-based detection system. Instead of measuring resistance changes in a continuous film, the system uses capacitive coupling between electrode pairs to detect force-induced changes in the dielectric properties of the咬合 material. This substitution enables higher resolution measurements while reducing manufacturing complexity and cost.

The matrix sensor is segmented into multiple independently addressable sensing elements, each capable of detecting contact independently. The control unit processes signals from each element separately, allowing the system to identify and distinguish multiple distinct contact groups simultaneously across the sensor surface, rather than treating the sensor as a single integrated unit.

The patent implements scanning and detection capabilities that exceed the minimum requirements by monitoring all electrode pairs systematically. The control unit scans through multiple electrode combinations and can identify contact groups even when they occupy only partial areas of the sensor, providing comprehensive coverage and the ability to handle complex multi-contact scenarios.

The patent replaces the passive visual marking method with an active electronic sensing system. Instead of relying on carbon transfer to indicate contact, the system uses electrode pairs to detect and quantify the mechanical force at each contact point. This substitution enables the system to capture not only the location but also the magnitude and temporal sequence of occlusal forces, preserving information that would be lost in visual methods.

The patent introduces an intermediary layer of dielectric material between the electrode pairs that mediates the detection process. This intermediary enables capacitive coupling and allows the system to measure force-induced changes in the electrical field, providing a quantitative measure of occlusal strength while maintaining the simplicity of a sheet-based system.

The sensor sheet is designed as a universal tool that can capture occlusion data from the entire dentition in a single placement. The large-area matrix array of electrodes provides comprehensive coverage of the occlusal surfaces, eliminating the need for multiple separate measurements or the use of mirrors to access different regions. The system processes signals from all electrode pairs simultaneously, providing a complete view of occlusion across the entire dentition.

The sensor sheet performs self-positioning and self-measurement functions. Once placed in the patient's mouth, the sheet automatically detects occlusal forces at all contact points without requiring the operator to manually position individual sensors or use auxiliary tools like mirrors. The control unit automatically processes the signals from all electrodes, reducing the operator's workload to simple placement and data retrieval.