Common types of dysgnathia

Narrow upper and lower jaw

Surgical palatal expansion (SPE) for the widening of the upper jaw Mandibular split osteotomy (lower jaw distraction) for expansion of the lower jaw

Characteristics and complaints

People with a smaller lower jaw often have very crooked teeth. This makes oral hygiene more challenging and strains your jaw. Jaw, head and neck pain are common consequences of this.

Lower jaw appliances

The corrective surgery

Expansion allows the lower jaw to widen. This procedure is largely pain-free and is carried out with the help of an appliance that sits firmly in your mouth. Before we do this, the jawbone is slightly weakened through a small incision in the oral vestibule.

Advantages of our surgical procedure

  • correction of crowding without losing natural teeth
  • short orthodontic treatment
  • quick recovery = short sick leave
  • genuine creation of space through bone growth
  • no exterior skin incisions
  • no jaw wiring
  • short surgery and short hospitalization
  • no blood products
  • no repeat surgery

Targeted expansion of the lower jaw Mandibular split osteotomy
(lower jaw distraction)

Mandibular split osteotomy is a good solution for crowding as it creates more room in the lower jaw without removing healthy teeth.

The orthodontist inserts the expansion appliance before surgery. The procedure is carried out while the patient is under general anesthesia. The surgeon performs the procedure exclusively via the oral cavity to avoid external scars. The mandibular symphysis, which lies directly in the middle of the chin, is weakened in order to allow expansion (distraction) of the bone. This procedure enables the build-up of bones and creates more room in the lower jaw. Directly after this procedure, you will notice a small gap between you lower front teeth. This gap will continue widening during the expansion phase until an orthodontist closes it.

The inpatient stay in our clinic is limited to two days. The first follow-up examination usually occurs after one week. From then on, the patient is required to turn the appliance by 0.01 inch each day (depending on the extent of crowding) in order to complete the distraction within 2-3 weeks. The expansion appliance stays in place for approx. 3-4 months until the bone has completely healed.


During the expansion process (1 week post-op) you will have to turn the expansion appliance (1x night). This procedure is pain-free. The orthodontist will carry out regular check-ups in consultation with our team. Sick leave is limited to approx. one week.

Please do not hesitate to contact our team if you have any questions.

What should I pay attention to?

  • Cool the area often and well during the first three days
  • Good oral hygiene (children’s toothbrush)
  • Smoking can compromise the distraction result - smoking is prohibited!
  • Do not use arnica before the surgery, and no aspirin before or after the surgery!
  • Only eat soft foods for approx. one week post-surgery
  • Physical exercise is allowed after approx. two weeks, only after prior consultation

Possible post-op complaints

  • Mild and reversible numbness in the upper lip
  • Mildly loose front teeth
  • The loose jaw can cause slight cracking sounds during the first week

Gallery patient stories