Im 22 years old. I just recently visited my orthodontist and for my case she recommended me to wear a palate expander for about 3 months as she says my only problem is in four my frontal upper teeth ( to see if it works) to gain some space to straightening my upper teeth, if it does not work the other option she gave me was to extract 4 premolars. Should I go for this? Is there another way to avoid extractions or another recommended treatment? Will this work at my age?