Characteristics of subgingival calculus detection by multiphoton fluorescence microscopy

Area of Science:

• Oral Biology
• Biomedical Imaging
• Periodontology

Background:

• Subgingival calculus is a primary cause of periodontitis and tooth loss.
• Current detection methods (X-rays, probes) struggle with calculus in periodontal pockets.
• Complete calculus removal is challenging, impacting periodontal therapy success.

Purpose of the Study:

• To evaluate multiphoton autofluorescence imaging for subgingival calculus detection.
• To compare its efficacy against one-photon confocal fluorescence imaging.
• To assess the feasibility of this system for clinical application.

Main Methods:

• Utilized multiphoton autofluorescence imaging and one-photon confocal fluorescence imaging.
• Examined fluorescence responses of gingiva, healthy teeth, and calculus.
• Assessed imaging performance with and without gingival coverage.

Main Results:

• Multiphoton imaging successfully detected tissue-covered subgingival calculus.
• One-photon imaging failed to visualize calculus hidden by gingiva.
• Demonstrated the superior ability of multiphoton fluorescence to penetrate tissue.

Conclusions:

• Multiphoton autofluorescence imaging is a promising tool for detecting otherwise hidden subgingival calculus.
• This technique can improve diagnosis and treatment planning for periodontitis.
• Offers enhanced visualization for more effective periodontal therapy.