Is it permissible for a woman to work in a mixed-gender environment to earn the money necessary for her dental treatment, provided she adheres to the legitimate hijab and chooses a workplace where mixing is minimized?

Allah Almighty commanded believing women to remain in their homes, but it is permissible for a woman to go out for her needs, observing proper covering and lawful hijab. It is also permissible for a woman to go out to work if she is in need of it, provided she is careful to cover herself and avoid unlawful mixing and seclusion (khalwa), and soft speech with men. The criterion for choosing work must be that it does not lead to forbidden acts.