This study aims to elucidate the biomechanical effects of combined loading of maxillary anterior and posterior implants using the sliding method on en-masse retraction of the anterior teeth and to quantify the loading ratio (LR) of anterior and posterior implants to achieve controlled retraction of the maxillary anterior teeth. A three-dimensional finite element model of the maxilla-upper dentition appliance was constructed. Implants were placed on the distal (A) and mesial (B) sides of the lateral incisors as well as on the mesial (C) side of the first molar and different amounts of force were loaded between the implants using 2- or 5-mm traction hooks. The labiolingual movement of the anterior teeth was recorded and the relationship between the LR of the implants and the movement of the central incisors was evaluated. With 2-mm traction hooks, the central incisors exhibited a translation tendency during retraction at lower A/C and B/C LR and labial or lingual crown inclination at higher values. With 5-mm traction hooks, the central incisors, lateral incisors, and canine teeth exhibited a labial crown inclination. The results of this study suggest that 2-mm traction hooks can cause labial crown inclination, translation tendency during retraction, or lingual crown inclination of the central incisors due to alterations in the LR of the anterior and posterior implants. The central incisors only exhibited labial crown inclination during combined loading of the anterior and posterior implants when 5-mm traction hooks were used.
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June 2020
Research Article|
February 18 2020
Three-Dimensional Finite Element Analysis on En-Masse Retraction of the Maxillary Anterior Teeth With Quantitative Combined Loading Control
Hui Qie, MDS
;
Hui Qie, MDS
1Department of Orthodontics, The Second Hospital of Hebei Medical University, Shijiazhuang, China.
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Lingliang Kong, MDS
;
Lingliang Kong, MDS
2Department of Orthodontics, The Jining Hospital of Stomatology, Jining, China.
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Fan Zhang, MDS
;
Fan Zhang, MDS
1Department of Orthodontics, The Second Hospital of Hebei Medical University, Shijiazhuang, China.
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Chenxi Li, MDS
;
Chenxi Li, MDS
1Department of Orthodontics, The Second Hospital of Hebei Medical University, Shijiazhuang, China.
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Lin Lu, MDS
;
Lin Lu, MDS
1Department of Orthodontics, The Second Hospital of Hebei Medical University, Shijiazhuang, China.
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Chenlei Dou, MDS
;
Chenlei Dou, MDS
1Department of Orthodontics, The Second Hospital of Hebei Medical University, Shijiazhuang, China.
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Lihua Shan, DDS
Lihua Shan, DDS
*
1Department of Orthodontics, The Second Hospital of Hebei Medical University, Shijiazhuang, China.
* Corresponding author, e-mail: selindashan@163.com
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J Oral Implantol (2020) 46 (3): 214–220.
Citation
Hui Qie, Lingliang Kong, Fan Zhang, Chenxi Li, Lin Lu, Chenlei Dou, Lihua Shan; Three-Dimensional Finite Element Analysis on En-Masse Retraction of the Maxillary Anterior Teeth With Quantitative Combined Loading Control. J Oral Implantol 1 June 2020; 46 (3): 214–220. doi: https://doi.org/10.1563/aaid-joi-D-19-00340
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