TITLE:
Dentoalveolar changes following maxillary distraction osteogenesis
AUTHORS:
Lili Yang, Eduardo Yugo Suzuki, Boonsiva Suzuki
KEYWORDS:
Maxillary Distraction; Non-Down-Fracture; Down-Fracture; 3-D Model Analysis
JOURNAL NAME:
Open Journal of Stomatology,
Vol.3 No.8,
November
15,
2013
ABSTRACT:
The purpose of this study was to compare the dentoalveolar
changes produced when using two different intraoperative surgical procedures
for maxillary distraction osteogenesis. Eight patients were assigned into two
groups according to the surgical procedure: down-fracture (DF, n = 6) vs
non-down-fracture (NDF, n = 2). Lateral cephalograms and 3-D models before and
after maxillary distraction were analyzed. The Mann-Whitney U test was used to compare the differences in the amounts of advancement and dento-alveolar
changes between the DF and NDF groups. The significance level was established
at 0.05. Although a significantly greater amount of maxillary movement was
observed in the DF group (10.0 mm ± 2.2) than in the NDF group (5.9 mm ± 2.3),
significantly greater arch length (8.7 mm ± 5.2) and arch width changes (6.0
mm ± 1.0) were observed in the NDF group than in the DF group, (arch lengths
3.0 mm ± 1.1 and arch width changes 3.2 mm ± 2.0). A significantly greater
amount of dental anchorage loss was observed in the NDF group. The use of the
NDF procedure resulted in greater amounts of dental anchorage loss than
resulted from the DF procedures when tooth-borne devices were used during
maxillary distraction osteogenesis. The type of surgical procedure might play
an important role in the amount and direction of the dental changes.