###Human: Is it mandatory to remove the premolars for my orthodontic treatment? ###Assistant: Hello. I can tell you about treatment in the broader sense. In case of the shorter lower jaw, either a surgical and orthodontic treatment is done (in case of poor esthetics, both jaws and teeth are corrected) or orthodontic correction of only teeth. Since your question is about the second treatment plan and pertains to extractions I will answer that. Extractions are relatively common in orthodontic treatment to create space. In cases with smaller lower jaws with space requirement, upper arch extractions are mandatory. Lower arch extractions are also advised if there is space requirement or extractions needed for bite improvement or maintenance of normal bite. So it is reasonable to advise the extraction of four teeth. You can send pictures of your teeth and X-rays to confirm whether this fits your case.