From time to time all xenos, whether a millennia old fungi or a brand new sapient synth, feel a little self-conscious about their looks.
And perhaps rightly so - studies have shown that a xeno’s appearance is the primary determining factor in who to purge in over 80% of cases.
So in a universe where your smile can mean the difference between life and death, it’s understandable why these xenos chose to fix their teeth with cosmetic nanobots - but OMG you won’t believe the result!