Hodge T M, Dhopatkar A A, Rock W P, Spary D J
University of Birmingham Dental School, St Chad's Queensway, Birmingham, UK.
J Orthod. 2004 Jun;31(2):132-7. doi: 10.1179/146531204225020427.
To determine the accuracy of direct or indirect bracket placement.
A prospective, randomized comparison of 2 different methods of bracket placement.
Queens Hospital, Burton upon Trent, UK between February and May 2001.
Twenty-six consecutive patients requiring upper and lower MBT trade mark pre-adjusted Edgewise appliances had their labial segments bonded directly or indirectly according to a split mouth system of allocation. Before and after bond-up all brackets were photographed and measured from tracings to determine positional differences from the ideal.
Using ANOVA (General Linear Model), vertical errors were found to be greater than those in the horizontal plane, which in turn were greater than angular errors (p<0.05). Errors were greater in the maxillary arch than in the mandibular arch. There was no significant difference between the mean errors produced by the two methods of bracket placement.
Mean bracket placement errors were similar with both techniques.
确定直接或间接托槽放置的准确性。
对两种不同托槽放置方法进行前瞻性随机对照研究。
英国特伦特河畔伯顿皇后医院，2001年2月至5月。
26例连续患者需要上下颌MBT预成直丝弓矫治器，根据口内分侧对照系统，将唇弓段直接或间接粘结。粘结前后对所有托槽进行拍照，并通过描图测量，以确定与理想位置的差异。
采用方差分析（一般线性模型），发现垂直误差大于水平面误差，而水平面误差又大于角度误差（p<0.05）。上颌弓的误差大于下颌弓。两种托槽放置方法产生的平均误差之间无显著差异。
两种技术的平均托槽放置误差相似。
