Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session E68: Undergraduate Research V
8:00 AM–11:00 AM,
Tuesday, March 5, 2019
BCEC
Room: 051
Sponsoring
Unit:
APS/SPS
Chair: Brad Conrad, American Institute of Physics
Abstract: E68.00015 : Focused Ultrasound as a Replacement for Endodontic Therapy*
10:48 AM–11:00 AM
Presenter:
Talisi Meyer
(Chemistry and Physics, Simmons College)
Authors:
Talisi Meyer
(Chemistry and Physics, Simmons College)
Phillip Jason White
(Radiology, Brigham and Women)
Michael Jordan
(Chemistry and Physics, Simmons College)
To avoid thermal damage to adjacent healthy tissues, we considered using the mechanical effects created by ultrasound, specifically that of cavitation. To generate proof-of-concept data, we designed, constructed, and tested a series of ultrasound transducers that delivered sufficiently low frequencies operating below 300 kHz and pressures below -30MPa to induce cavitation in degassed water with less than 3ppm. Our initial experiments have shown that sufficient ultrasound energy can be transmitted through intact ex vivo human teeth to elicit nonlinear streaming in the root canal of intact ex vivo human teeth. We have also demonstrated the use of equivalent parameters to kill bacteria. We will further determine and refine the optimal ultrasound parameters for eliciting bactericide in the intact tooth.
*SCARP at Simmons College
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