Deblock L, Petitpas L
Orthod Fr. 1997;68(1):253-64.
During orthodontic displacement, integrity of root and periodontis needs the knowledge of forces systems developed by orthodontic appliances. Analyses of different tooth movement require some biomechanic rules especially to choose magnitude and direction of forces, with respect to the center of resistance and the C/F ratio. Forces systems developed by the Burstone segmented arch technique have to be shown biologic because they produce light and variable pressures according to patient age and rate of periodontal disease.
在正畸移动过程中，牙根和牙周组织的完整性需要了解正畸矫治器产生的力系统。不同牙齿移动的分析需要一些生物力学规则，特别是要根据抗力中心和C/F比来选择力的大小和方向。Burstone分段弓技术产生的力系统必须证明是生物学的，因为它们会根据患者年龄和牙周疾病发生率产生轻微且可变的压力。
