There are quite a few options for her.
Options are - removable partial denture (RPD), bridge and implants and which is the best can be decided after careful examination.
Implants, can be a best option as it is provides fixed tooth unlike RPD and does not damage the adjacent teeth which is the case in bridge option.
Implants require time to settle in the jaw and it requires a minor surgical procedure where it is to be fixed.
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