Corbin Duncan

Radian Station

Radian Station: an electric toothbrush, water flosser and water tank on a shared base Jump to final product

the brief

Design an oral hygiene ecosystem that integrates into a modern bathroom seamlessly.

research

  • 74% of Americans Brush Twice Daily Deltadental.com
  • 30% of Americans Floss Daily CDC.gov
  • 32% of Americans Never Floss. CDC.gov

meet jack

  • 56 years old
  • Has a house and a family
  • Doesn’t floss regularly but feels bad about it
  • His significant other values cleanliness in the home
  • Has disposable income
Jack, a man in his fifties in a green jacket, outdoors

How might we integrate flossing as a long-term habit?

The product should be an extension of the bathroom, existing in harmony with the space

Moodboard of clean, architectural, harmonious products and a warm green-tiled bathroom

What technology is best for Jack?

Brush Options

manual

  • 60% coverage
  • 45s brush time
  • low cost
  • no timer
  • no guidance

electric

  • 80% coverage
  • 60-90s brush time
  • moderate cost
  • timer built in
  • no guidance

smart

  • 100% coverage
  • 120s+ brush time
  • high cost
  • timer built in
  • guidance

Floss Options

string type

  • low upfront cost
  • low annual cost
  • very effective
  • requires skill
  • low waste

floss pick

  • low upfront cost
  • higher annual cost
  • less effective
  • low skill ceiling
  • high waste

water flosser

  • high upfront cost
  • low annual cost
  • effective
  • no skill required
  • medium waste

Electric Toothbrush Landscape

Lineup of current electric toothbrushes from several brands

Water Flosser Options

Lineup of current countertop and cordless water flossers

main pain points

  • Friction
  • Motor skills
  • Mess
  • Cohesion
  • Accountability

ideation

Sheet of green line sketches of brush, flosser and station concepts, with the strongest ideas circled
Shaded concept sketches of countertop stations with lids, drawers and a round base

prototyping

Minimum Dimensions for the 90th Percentile sink
Gray block showing the 10 by 8 by 4 inch footprint
Avg water flosser capacity: 600ml
Target: 650+20ml margin
Cylinders and cubes adding up to about 670ml of water volume

Volume studies with AR

AR volume blocks placed on a bathroom sink
Reaching for an AR station model on the sink edge
Using an AR station model mounted at the sink
AR station model sitting beside the faucet

Ergonomic Considerations

Five printed handle prototypes on a cutting mat, with their grip cross-sections below

Most Comfortable for Flossing

Hand holding the flosser handle prototype

Most Dexterous for Brushing

Hand holding the toothbrush handle prototype

refinement

Optimizing Layout

Seven top-down layouts of the station, with handwritten notes on sight lines, knob access and size; the rounded, compact one is marked most cohesive

Brush Refinement

Fifteen toothbrush handle iterations side by side, from a plain round head to the final design with a replaceable head, highlighted at the end

final product

Radian Station in four colorways: creme white, charcoal, baby blue and tea green
  • Creme White
  • Charcoal
  • Baby Blue
  • Tea Green
Close-up render of the toothbrush head, labeled: replaceable brush heads
Radian Station from the side: flosser, toothbrush and water tank on the base
Render of the underside of the base, labeled: replaceable cable and three cable routing options
Close-up render of the base with the toothbrush docked, labeled: flosser flow knob
Top-down render of the base with the tank lid, brush and flosser docks
Render of the water tank, labeled: lip contains stray water
Close-up render of the toothbrush handle, labeled: brush pressure indicator light and mode indicator
Radian Station on a marble bathroom counter beside the sink, in soft window light

Created with the help of Vizcom

A hand holding the Radian toothbrush against a gray wall

Created with the help of Vizcom

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