What can be done by an orthodontist to straighten just one tooth?

Options: You can get aligners (clear plastic trays that fit over teeth), appliances (activated clips that fit around teeth), or braces (brackets & wires glued to the teeth). Which is best depends on how significant the movement of the tooth will be. And fyi, rarely does straightening one tooth mean moving only one tooth. Go see a dentist or orthodontist to find out what she/he recommends.

Retainer or aligner: As long as there is space available and the opposing teeth are not in the way, it is very easy to tip or rotate a tooth with retainers or aligners without disturbing the other teeth.

Many possibilities. : Simple limited fixed, removable appliance, or aligner type invisalign or other options are reasonably used.

Many options: Depending upon the nature of the crooked tooth, a spring clip retainer works well, a limited invisalign type treatment works well, braces of course work the best. It is funny when we correct a "crooked tooth", the patient frequently will then say "what about this one(another tooth)" as when teeth align, other smaller issues become more prominent. Discuss your options with your orthodontist.

Many things: Simple retainer type appliances, invisible braces or removable appliances---and it deoends on which tooth!

Depends: You may need more treatment than you think . The "crooked" tooth may be affecting or be affected by others nearby. See an orthodontist for a complete evaluation.

Spring aligners: We have used these to address single tooth issues.

1 tooth?: Rarely is just 1 tooth out of position. Often adjacent teeth slide in to block space. See a specialist Orthodontist for an initial exam, usually free, and a frank discussion as to what can be done and the appropriate technique/appliance to resolve your problem to your satisfaction.

A tooth : is out of position usually because the teeth around it are also in the wrong places. Your orthodontist will explain what needs to be done.