MUMBAI, India, June 30 -- Intellectual Property India has published a patent application (202641073094 A) filed by Saveetha Institute Of Medical And Technical Sciences on June 12, 2026, for Canal-Hue: Ph Sensitive Colour Changing Paper Point For Detection Of Real Time Intracanal Infection.
Inventors include Dr K Ranjima; Dr. Harish Selvaraj; and Dr. Deepak Nallaswamy Veeraiyan.
The application for the patent was published on June 26, 2026, under issue no. 26/2026.
Abstract: ABSTRACT The present invention discloses a pH-sensitive colour-changing paper point impregnated with bromothymol blue for rapid chairside detection of residual microbial activity within the root canal system. The device operates on the principle that bacterial metabolism produces acidic by-products, leading to a decrease in intracanal pH. Bromothymol blue pH indicator undergoes a visible colour transition from blue to yellow within a pH range of 7.6 to 6.0, enabling real-time assessment of infection status. The invention provides a simple, costeffective, and non-culture-based diagnostic adjunct that aids clinicians in determining the adequacy of canal disinfection and improving treatment outcomes in endodontic therap
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