The moment
The mirror after fitting. Not a reaction to teeth, but to a face that looks the way the patient remembers or hoped. It is quiet more often than dramatic.
What makes it possible
The design shown first, so that the moment is a confirmation rather than a surprise; and the restraint that keeps the result recognisable.
Why it lasts
The fulfilment is in the follow-up, when the smile is still right years later and the patient has stopped thinking about it. Transformation is the event; fulfilment is the decade after.
