Comparison of straight wire appliance versus edgewise appliance in orthodontic treatment outcome / 华西口腔医学杂志

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the difference between straight wire appliance and edgewise appliance treatment outcome.</p><p><b>METHODS</b>80 cases finished with two-arch straight wire or edgewise appliance between 1994 and 2001 were selected. The PAR index on pre- and post-treatment dental casts and PAR score was recorded respectively. According to the same pre-treatment PAR score and extraction pattern, the samples were divided into two groups, straight wire group and edgewise group, and each group had 40 cases. The data were analyzed statistically.</p><p><b>RESULTS</b>Estimated with the post-treatment PAR score of posterior teeth alignment, the treatment with straight wire appliance was lower than that with edgewise appliance (P < 0.01). There was no statistical difference in other recorded PAR score between two groups. For the mean treatment duration, straight wire appliance (3.95 months) was shorter than edgewise appliance.</p><p><b>CONCLUSION</b>As for the posterior teeth alignment, the straight wire appliance was more accurate, and the straight wire appliance was more efficient than edgewise appliance.</p>