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My daughter's permanent teeth have come in.
Literal
Daughter [possessive-の] permanent-teeth [subject-が] have-sprouted-[come-てきました].
生える ('to grow, to sprout' — for teeth, hair, plants) with ~てくる marks the gradual coming-in of the teeth. The ~てくる here shows a change emerging into view/experience. A parent marking a developmental milestone.