Results and the complications showed in 10 patients treated with osteogenical distraction from 2002 to 2007.

Treatment is based on the following diagnosis:

• Hemifacial microsomia 3

• After effects of unilateral ankylosis 1

• After effects of bi-lateral ankylosis 2

• Anomalies in growth development 3

• After effects caused by neoplasias 1

Results were followed up at the occlusal level, in its inter-maxillary relationship and through orthopantomographies from 2 to 7 years.

Six cases were unilateral and four were bi-lateral. one of these patients was bone distracted two times because the defect re-appeared.

New bone formation of 7 to 20 mm, average, was confirmed.

Age range goes from 8 to 29 years old, 8 females and 2 males.

Two patients received complimentary treatment, one a transplant of TMJ due to ankylosis relapse and the other one orthognatic surgery.

The complications found in 18 bone distraction processes were of different origins. They were classified according to the degree of alteration they caused on the treatment.

• Low 16.6% appliances torn up 1

• Bone distractor device stucked 1

• Localized infections 1

• Moderate 5.5% TMJ dysfunction 1

• High 5.5% pseudoarthrosis 1

Conclusions: Results achieved show that bone distraction is an efficient procedure to treat poor mandibular growth in a wide range of ages.

New bone formation remains stable for a long time, but future growth depends on the viability of the centers of growth.

Bone distraction involves certain complications but if it is treated accordingly, final result is not altered.

Conflict of interest: None declared.