The Biobloc technique was developed by Dr. John Mew of London , England in the 1950's. Simply stated, the Biobloc technique is effective for children in the 6-10 age range and is based on first placing the upper front teeth ideally in the face and then bringing the lower jaw forward.

The upper front teeth are positioned ideally by having the child wear a removable upper appliance which widens the upper arch and moves the upper front teeth upward and forward. This appliance is worn full time, except for tooth brushing, for approximately six months. Depending on the situation, this creates from a mild to a very pronounced discrepancy between the upper and lower teeth.