Chinese Journal of Tissue Engineering Research ›› 2010, Vol. 14 ›› Issue (13): 2307-2310.doi: 10.3969/j.issn.1673-8225.2010.13.008

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Three-dimensional forces of Buccal multiloop appliance in the mouth opening and closing movement

Miao Nan1, Hou Lu1, Xu Shi-qian2   

  1. 1 Department of Orthodontics, Harbin Medical University, Harbin   150086, Heilongjiang Province, China; 2 Harbin Institute of Technology, Harbin   150001, Heilongjiang Province, China
  • Online:2010-03-26 Published:2010-03-26
  • Contact: Hou Lu, Chief physician, Department of Orthodontics, Harbin Medical University, Harbin 150086, Heilongjiang Province, China houlu@hotmail.com
  • About author:Miao Nan★, Studying for master’s degree, Department of Orthodontics, Harbin Medical University, Harbin 150086, Heilongjiang Province, China nannanonly@hotmail.com

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Abstract:

BACKGROUND: Buccal multiloop removable appliance is a novel appliance. It is primarily used to treat Angle Ⅲ malocclusion at milk teeth and mixed dentition periods. In addition, it can promote maxilla development and inhibit mandible excessively forward development.
OBJECTIVE: To observe the three-dimensional forces of Buccal multiloop appliance in the mouth opening and closing movement and analyze the changing regularity
METHODS: Buccal Multiloop Resistance Tester was used to imitate and calculate the Buccal multiloop removable appliance three-dimensional forces in the mouth opening and closing movement and analyze the changing regularity.
RESULTS AND CONCLUSION: The min force in the mouth opening movement was (64.96±48.47) g when 2 mm sagittal afterburner and 5 mm opening degree. The max force in the mouth opening movement was (285.47±14.44) g when 3 mm sagittal afterburner and 0 mm opening degree. The min force in the mouth closing movement was (79.31±19.94) g when 3 mm sagittal afterburner and 5 mm opening degree. The max force in the mouth closing movement was (285.47±14.44) g when 3 mm sagittal afterburner and 0 mm opening degree. The dimensional linear regression equation in the mouth opening movement was = -0.415 44 + 0.529 42 X1+0.803 64 X2 -0.004 17 X3. The dimensional linear regression equation in the mouth closing movement was = -0.426 5+ 0.559 4 X1+0.777 51 X2+0.005 16 X3 . The results showed the levels of the mouth opening and closing had significant effects on Buccal multiloop removable appliance forces, but the mandibular lateral movement had no effects. There was linear relationship among sagittal saw forces, the levels of the mouth opening and closing and the Buccal multiloop removable appliance forces.

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