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Three-dimensional finite element analysis of the craniomaxillary complex during maxillary protraction with bone anchorage vs conventional dental anchorage
ارتودنسی
Orthodontics
پژوهشي
Research
<p> <strong>Introduction</strong></p><p> The aim of this study was to explore the biomechanical effects on the craniomaxillary complex of bone anchorage and dental anchorage during maxillary protraction.</p><p> <strong> Methods</strong></p><p> We established 2 finite element models. One simulated maxillary protraction with dental anchorage in the maxillary first molars and the other with bone anchorage in the infrazygomatic buttresses of the maxilla. The magnitude of the applied forces was 500 g per side, and the force directions were 0°, 10°, 20°, and 30° forward and downward relative to the occlusal plane. </p><p> <strong>Results</strong></p><p> The finite element model of the craniomaxillary complex could displace in an almost translatory manner when the force direction was about 20° in the bone anchorage model and about 30° in the dental anchorage model. The nodes representing the sutures at the back of the maxilla showed greater stress in the bone anchorage model than in the dental anchorage model in the same force direction. It is the opposite at the front of the maxilla. </p><p> <strong>Conclusions</strong></p><p> We should determine the direction of applied force according to the anchorage location and skeletal characteristics of patients before maxillary protraction. The dramatic effects of maxillary protraction with bone anchorage can be based on the advantages of bone anchorage, not on the changes in the region of the applied force. </p><hr><p></p><p> <strong>Source: </strong>American Journal of Orthodontics & Dentofacial Orthopedics </p><p> <a href="http://www.ajodo.org/article/S0889-5406(12)01085-2/abstract" target="_blank"><font color="#0000ff">Full Text</font></a></p>
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http://idai.ir/browse.php?a_code=A-10-32-1737&slc_lang=fa&sid=1
Xiulin
Yan
10031947532846008176
10031947532846008176
No
Department of Orthodontics, School of Stomatology, China Medical University, Shenyang, Liaoning, China
Weijun
He
10031947532846008177
10031947532846008177
No
Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning, China
Tao
Lin
10031947532846008178
10031947532846008178
No
Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning, China
Jun
Liu
10031947532846008179
10031947532846008179
No
School of Science, Northeastern University, Shenyang, Liaoning, China
Xiaofeng
Bai
10031947532846008180
10031947532846008180
No
Department of Oral and Maxillofacial Surgery, School of Stomatology, China Medical University, Shenyang, Liaoning, China
Guanggi
Yan
10031947532846008181
10031947532846008181
No
Department of Oral and Maxillofacial Surgery, School of Stomatology, China Medical University, Shenyang, Liaoning, China
Li
Lu
10031947532846008182
10031947532846008182
Yes
Department of Oral and Maxillofacial Surgery, School of Stomatology, China Medical University, Shenyang, Liaoning, China