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Abstract

A stable mini-implant provides a splendid orthodontic anchorage, which leads a profound influence to the treatment course. This study used finite element method, with a molar and premolar on the posterior mandible by computerized simulation, to investigate the biomechanical effects of the orthodontic mini-implant. Factorial analyses were performed including the cortical bone thickness, the diameter of the mini-implant and angle of the orthodontic force. The results showed that the diameter of the mini-implant affected the stress distribution on the cortical bone. All parameters had significantly effects on the cancellous bone stresses. The force angle and the diameter of the mini-implant altered the ability of the mini-implant which carries the orthodontic stresses.

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