[Biomechanical study on 3-dimensional finite element model of maxillary protraction and the palate expansion].
OBJECTIVE
To determine the rule of simulated protraction and palate expansion on shift of maxillary bone,and to supply the scientific data for treating maxilla in patients with cleft lip and palate.


METHODS
Based on the establishment of 3-dimensional finite element model of maxilla with cleft lip and palate, we used ANSYS 10.0 software to simulate protraction and expand fissures of palate, and analyzed the changes of maxillary shift.


RESULTS
After the simulated protraction and pa-late expansion,an upward, forward, and outward growth occurred on maxilla, and the normal lateral bow had no internal shrinkage as well as the abnormal one.


CONCLUSIONS
Combined palate expansion with maxillary protraction treatment in patients with cleft lip and palate tend to improve the development of maxillary bone.
Lei
Yonghua
Y
Department of Stomatology, Xiangya Hospital, Central South University, Changsha 410008, China. lyh8484123@126.com
Jian
Xinchun
X
Ren
Biqiao
B
D001696:Biomechanical Phenomena; D002971:Cleft Lip / Q000628:therapy*; D002972:Cleft Palate / Q000628:therapy*; D005115:Extraoral Traction Appliances; D020342:Finite Element Analysis; D006801:Humans; D021621:Imaging, Three-Dimensional; D008310:Malocclusion / Q000628:therapy*; D008437:Maxilla / Q000502:physiology; D010155:Palatal Expansion Technique; D063173:Retrognathia / Q000628:therapy