den burcu lujvo

b₁ is a toothbrush with bristles b₃.

In notes:

brulu'i: l₁ (agent) sweeps/brushes l₂, removing soil/contaminant l₃ with brush l₄=b₁.
denjisygau: g₁ (agent) brushes/cleans the teeth of d₂.
denke'a: x₁=k₁ is a tooth cavity/dental caries [demineralized site] of tooth x₂=k₂=d₁
denpesxu: p₁ is a quantity of tooth-paste, of composition p₂.