Orthodontic treatment is often required to create ideal spaces for the missing teeth, whether the missing teeth are developmentally (congenitally) absent or whether they were lost.
Often there is a lack of space between the teeth vertically and horizontally to accommodate an ideal size and shape prosthetic (false) tooth. In cases where an implant tooth is planned, enough space between the roots of the teeth needs to be created to accommodate an implant screw safely.
In patients where there are missing teeth over a prolonged period, the opposing teeth often drift down or up, and this leaves reduced space to accommodate full height prosthetic teeth. Fixed appliances are used to pull the teeth back into original position/back into the bone intending to give enough vertical space for the ideal size prosthetic teeth in the opposing arch.