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Solutions in Endontonics
Simulation of a cavitating bubble inside a single root canal filled with water

Simulation of Laser induced cavitation with Ansys Fluent

Sector: HealthSpecialist field: Fluid mechanics

Lumendo AG is an innovative company researching injectable filler and endodontic debridement solutions. With the simulation technology of Ansys and the help of CADFEM, new methods were tested and further developed. In certain endodontic treatments, dentist use a 3000 nm pulsed laser, which can create a cavitating bubble that emits a powerful shockwave.



To better understand the fluid dynamic effects generated by this phenomenon, a cavitating bubble inside a single root canal filled with water is simulated with Ansys fluent. The aim of the project was to create a proof of concept for root canal cleaning using laser induced cavitation, using Ansys simulation tools.


A pragmatic simulation model was developed in Ansys Fluent using moving wall to simulate free surface expansion and shrinkage of the bubble.

Customer benefits

The Proof of concept developed helped to have a better understanding of the influence of the geometrical dimensions for system tuning and find the most critical locations. This POC was developed with fewer prototypes than it would with previous methods.

Project Details


To assess the efficiency of root canal cleaning using laser induced cavitation, CFD simulation with Ansys Fluent were performed. The goal of the simulation is to give insight into the pressure peaks and temporal evolution though the root canal down to the apex.

Customer Benefit

  • Prove of concept of simulation method for laser induced cavitation
  • Increased knowledge of the design including an identification of the most critical locations.
  • Useful information to start experimental validation and production without extensive iterative prototyping.
  • Increased knowledge about the influence of geometrical dimensions for system tuning.
  • Local information not accessible with experimental measurements.


The simulation model consists of a moving wall, representing the free surface of the bubble, which is based on experimental data. In a first phase, the bubble is expanding induced through the laser. In the second phase the cavitation of the bubble occurs. The pressure waves are then tracked and analyzed.

Images: © Lumendo AG

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