Photothermal and luminescence-based dental plaque detection pen
Innovative pen-like device using photothermal radiometry and luminescence for rapid, non-invasive dental plaque detection, compatible with smartphones. Clinically validated and FDA approved, it differentiates plaque from other dental issues, enhancing oral health monitoring.
Overview
Introducing an advanced, compact device designed for rapid detection of dental plaque using photothermal radiometry (PTR) and modulated luminescence (LUM). This pen-like solution integrates with a smartphone app, offering a non-invasive, dye-free alternative to traditional methods. The device is FDA approved and capable of distinguishing plaque from caries, cracks, and fillings, providing an effective tool for both consumers and oral care professionals to monitor oral hygiene and health.
Technical specifications
- Dual-modality detection: Utilizes PTR to enhance contrast through localized heat from absorbed light, and LUM to detect plaque-specific fluorescence.
- Real-time data processing: Equipped with a photodiode and IR sensor, the device performs point scans, extracting amplitude and phase values in real time.
- Smartphone integration: Displays results via an app, including voice feedback and scan images, allowing users to track oral hygiene over time.
- Design features: Handheld, pen-like form factor suitable for home use, with reliable performance under varying lighting and saliva conditions.
Technology readiness level
Currently at TRL 6, the technology has been clinically validated and is undergoing further refinement and prototyping. The next steps include developing prototypes, app connectivity, and conducting home-use trials to ensure usability and accuracy in everyday settings.
About University of Toronto
The University of Toronto is a comprehensive public research university with three campuses in the Toronto region and a globally scaled research enterprise. Its downtown footprint is embedded within a major academic health network and an adjacent innovation district, enabling co-located labs, clinical trials, and rapid testing with end users. Companies connect through co-op and long-duration internships, sponsored research, and access to shared core facilities and prototyping resources. Research is supported by Canada’s Tri‑Agency (NSERC, CIHR, SSHRC) and the Canada Foundation for Innovation, alongside provincial programs and industry partnerships. A dedicated technology transfer office provides IP management, licensing, and startup support through a coordinated entrepreneurship network.
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