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Portable toothbrush: the presentable prototype (phase 2)

A second, more realistic version to convince investors and users on video and during fundraising — while keeping a working rotary mechanism.

  • Health / Hygiene
  • Aesthetic prototyping
  • FDM
  • June 2025
Portable toothbrush: the presentable prototype (phase 2)
// ClientSmyleeth
// SectorHealth / Innovation
// TechnologyFDM 3D printing
// CompletedJune 2025

Client's need

1

The request – An aesthetic, handleable prototype for customer research

The client wanted a second version of the prototype, more visually realistic, to win over investors and users. Objectives:

  • Convey a pen format, with a harmonious design
  • Keep the lipstick-style rotary mechanism
  • Integrate a real toothbrush head for greater realism
  • Allow smooth handling during demonstrations
The request – An aesthetic, handleable prototype for customer research
2

The need – A realistic prototype for sales pitches and fundraising

The prototype was intended for:

  • Video presentations and demonstrations
  • A fundraising round
  • Feedback from potential customers
The need – A realistic prototype for sales pitches and fundraising
3

Our objective – Striking a balance between aesthetics and technical feasibility

Our priorities:

  • Honour the intended design despite the limits of 3D printing
  • Keep the mechanism functional
  • Produce a smooth, coherent shape
Our objective – Striking a balance between aesthetics and technical feasibility

Our response

1

Reworking the model for an attractive finish

  • Full rework of the model from the existing mechanism
  • Integration of a real toothbrush head
  • Choice of an appealing colour
  • Multiple iterations to refine the final fit
Reworking the model for an attractive finish
2

Iterations and adjustments for an aesthetic FDM prototype

  • Technology: FDM, for its simplicity and low cost
  • Challenges: precise fit, fragility of the parts during assembly
  • Solutions: numerous iterations
  • Printing several copies of the final parts to anticipate breakage
  • Close attention to surface quality
Iterations and adjustments for an aesthetic FDM prototype
3

An inspiring prototype to prepare the next stage of the project

  • Delivered with photos and handling videos
  • Prototype seen by the client as an inspiring starting point
  • Currently under joint consideration to: optimise the final design
  • Design a refill system
  • Create a handleable version intended for future small-batch production
An inspiring prototype to prepare the next stage of the project
Conclusion

Convincing with a credible prototype

A second, more realistic version, ready for video and fundraising, without losing its working mechanism. 3D prototyping supports the route to market too.

In pictures

The project in pictures

Portable toothbrush: the presentable prototype (phase 2) — photo 1
Portable toothbrush: the presentable prototype (phase 2) — photo 2
Portable toothbrush: the presentable prototype (phase 2) — photo 3
Portable toothbrush: the presentable prototype (phase 2) — photo 4
“
I'm very pleased with the work done so far, and grateful for the energy you have put into the Smyleeth project.
Michel Tesanfounder · Smyleeth

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