Abstract
Our aim was to evaluate the feasibility of a minimally-invasive surgical technique
for anterior maxillary distraction osteogenesis to correct maxillary hypoplasia in
patients with clefts. A modified Y distractor was placed intraorally in 106 patients
with cleft- associated maxillary deficiency to facilitate protraction of the maxilla.
Subsequently the patients had an anterior maxillary osteotomy through a minimally
invasive incision, followed by activation of the appliance at the rate of 0.8 mm/day until positive overjet was achieved. The patient’s lateral cephalograms were
evaluated preoperatively (T1), after activation (T2), and one year postoperatively
(T3). Collected data were assessed with the paired t test, and probabilities of < 0.001 were accepted as significant. A mean (SD) of 10.4
(2.58) mm anterior maxillary advancement was obtained in all patients after 10-13
days of distraction. The sella–nasion-point A (SNA) angle increased from 75.37° to
83.01°. When we compared the cephalometric variables at T1 and T2, the mean maxillary
length and overjet at T2 were significantly higher (p < 0.001). The comparison of mean values at T2 and T3 was not significant. Minimally
invasive anterior maxillary distraction with the modified Y distractor resulted in
changes after activation that were consistent one year postoperatively, making it
a conservative, less traumatic, and effective treatment of cleft-related maxillary
deficiency.
Keywords
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Article info
Publication history
Published online: June 04, 2020
Accepted:
March 31,
2020
Identification
Copyright
© 2020 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.
