| dc.description.abstract | Background: Distraction Osteogenesis is popular for long bones. And nowadays it has found its
role in facial bone deficiency treatments. Purpose: We used our special designed Distractor for
advancement of Maxillary deficiencies in cleft lip and palate patients. The purpose of this paper is
to compare the treatment of hypoplastic, posteriorly retruded maxillary of cleft palate patients
using distraction osteogenesis vs. Le fort I orthognathic surgery for length of advancement, stability
and relapse, growth after distraction and soft tissue expansion and soft tissue profile changes.
Meterial & Methods: In group A only Le fort I and surgical maxillary advancement sometimes with
bone graft were done. In group B we used our special Distractor for Distraction Osteogenesis and
advancement of the Maxillary bone. Demographic data, length of retrusion of maxilla, time length
of treatment, length of advancement and relapse, SNA and SNB angles were measured and included
in the study. The results were compared in each group before and after advancement and
between both groups. The rate of distraction was 0.5 mm twice per day to achieve normal occlusion
with 2 mm overcorrection more than calculated measures. The devices removed after 10
weeks as latency period. Results: The SNA increased at the end of distraction (p < 0.001), with no
significant relapse indicating stability at 1 year after treatment. The total length of advancement
in group A was 17 ± 4 mm and in group B was 20 ± 3 mm. The difference between before and after
measurements in each group was significant (p = 0.002, p = 0.003 respectively). The mean length
of relapse in group A was 3 ± 1 mm and in group B was 1 mm. Discussion: For the deformities and
retrusions less than 7 - 8 mm, the Orthognatic surgery is the treatment of choice, however for more retrusions (>10 mm) we recommend Distraction Osteogenesis, and it preferred to start it soon in younger ages. | en_US |
