Fluorescent Nanoparticles for Caries Detection
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Solution Overview
Problem
Current methods for diagnosing dental caries, especially early carious lesions, are challenging due to their variable presentation, difficulty in differentiation between active and inactive lesions, and the need for expensive and radiation-based diagnostics, which can be harmful and invasive.
Innovation Solution
A composition comprising nanoparticles with a biocompatible and biodegradable polymer bearing a cationic moiety or net positive charge, capable of associating with carious lesions, and optionally bonded with an imaging agent, for both detection and treatment of carious lesions, using a standard dental curing lamp for illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If X-ray imaging is used to detect carious lesions, then detection capability is improved, but radiation exposure and cost increase
Solution Approach 1:
The patent replaces the X-ray imaging system (radiation-based detection) with a fluorescent nanoparticle-based optical detection system. The nanoparticles are applied topically to the tooth surface and emit fluorescent signals when they bind to carious lesions, allowing detection without radiation exposure while maintaining diagnostic capability.
Solution Approach 2:
The patent introduces fluorescent nanoparticles as an intermediary substance that binds to carious lesions and provides detectable optical signals. These nanoparticles serve as a mediator between the lesion and the detection system, enabling visualization of early caries through fluorescence microscopy or imaging without requiring ionizing radiation.
2Measurement precision
If tactile probing is used to detect carious lesions, then detection capability is improved, but tooth damage risk increases
Solution Approach 1:
The patent replaces tactile probing (mechanical contact with explorers) with optical detection using fluorescent nanoparticles. The nanoparticles are applied as a topical solution and visualized through fluorescence imaging, eliminating the need for mechanical contact that could accelerate cavitation or cause permanent damage to weakened tooth structure.
3Reliability
If early carious lesions are treated with invasive procedures, then treatment effectiveness is improved, but patient harm and cost increase
Solution Approach 1:
The patent enables preliminary detection and diagnosis of early carious lesions before they progress to require invasive treatment. By identifying lesions at the white spot stage through fluorescent nanoparticle binding, clinicians can implement conservative remineralization therapies first, reserving invasive procedures like drilling and fillings for cases that progress despite conservative management.
Solution Approach 2:
The patent provides localized delivery of diagnostic and therapeutic agents through nanoparticles that bind specifically to carious lesions. The fluorescent nanoparticles concentrate at the lesion site, providing targeted detection and enabling localized application of remineralizing agents such as fluoride, calcium, or phosphopeptides directly to the affected area without requiring invasive access.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables non-invasive, cost-effective, and biocompatible detection and treatment of carious lesions, reducing the need for invasive procedures and radiation exposure, while differentiating between active and inactive lesions to guide conservative treatment strategies.
Implementation Method 1
The component or nanoparticle comprises a biocompatible, bio-based, and/or biodegradable polymer bearing at least one cationic region or having a net positive charge that is capable of associating with one or more caries or carious lesions on a tooth
Implementation Method 2
The component or nanoparticle also comprises an imaging agent that enables detection of the particle after being administered and after the nanoparticle associates with the one or more carious regions on the tooth
Data Source
AI summary
Components, for example, nanoparticles for detecting and/or treating one or more active carious lesions or microcavities in teeth of a subject are provided. The component or nanoparticle may comprise a biocompatible and biodegradable polymer (e.g., a starch) bearing at least one cationic region and/or having a net positive charge and thereby capable of associating with one or more active and/or early carious lesions on a tooth in an oral cavity of a subject. The components or nanoparticles are optionally water soluble or dispersible. The components or nanoparticle also comprises an imaging agent (e.g., a fluorophore or dye) bonded to the biocompatible and biodegradable polymer. The component or nanoparticle is thus capable of indicating the presence of one or more active carious lesions when the component or nanoparticle is associated therewith. Oral care compositions comprising such compounds/nanoparticles and methods of making and using the same are also provided.