The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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Three-dimensional finite element analysis on the effects of maxillary protraction with an individual titanium plate at multiple directions and locations

  • Fan Wang (Department of Orthodontics, School of Stomatology, Capital Medical University) ;
  • Qiao Chang (Department of Orthodontics, School of Stomatology, Capital Medical University) ;
  • Shuran Liang (Department of Orthodontics, School of Stomatology, Capital Medical University) ;
  • Yuxing Bai (Department of Orthodontics, School of Stomatology, Capital Medical University)
  • Received : 2023.10.23
  • Accepted : 2024.02.01
  • Published : 2024.03.25
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Abstract

Objective: A three-dimensional-printed individual titanium plate was applied for maxillary protraction to eliminate side effects and obtain the maximum skeletal effect. This study aimed to explore the stress distribution characteristics of sutures during maxillary protraction using individual titanium plates in various directions and locations. Methods: A protraction force of 500 g per side was applied at forward and downward angles between 0° and 60° with respect to the Frankfort horizontal plane, after which the titanium plate was moved 2 and 4 mm upward and downward, respectively. Changes in sutures with multiple protraction directions and various miniplate heights were quantified to analyze their impact on the maxillofacial bone. Results: Protraction angle of 0-30° with respect to the Frankfort horizontal plane exhibited a tendency for counterclockwise rotation in the maxilla. At a 40° protraction angle, translational motion was observed in the maxilla, whereas protraction angles of 50-60° tended to induce clockwise rotation in the maxilla. Enhanced protraction efficiency at the lower edge of the pyriform aperture was associated with increased height of individual titanium plates. Conclusions: Various protraction directions are suitable for patients with different types of vertical bone surfaces. Furthermore, when the titanium plate was positioned lower, the protraction force exhibited an increase.

Keywords

Acknowledgement

This study was supported by Innovation Research Team Project of Beijing Stomatological Hospital, Capital Medical University (CXTD20223), Beijing Hospitals Authority Clinical Medicine Development of Special Funding Support (ZLRK202330).

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