Introduction

  The purpose of this study was to examine the overall success of miniscrews inserted in the paramedian palatal region for support of various appliances during orthodontic treatment.

 Methods

 The patients received 1 or 2 miniscrews in the paramedian anterior palate of 8.0-mm length and 1.6-mm diameter placed during orthodontic treatment by the same experienced orthodontist.

 Results

  In total, 196 patients (121 girls, 75 boys median age, 11.7 interquartile range, 3.7) who received 384 miniscrews were evaluated. Two hundred four miniscrews were used with rapid palatal expansion appliances, 136 with appliances for distalization of posterior teeth, and 44 with other appliances, such as transpalatal arches for tooth stabilization. The overall survival of the miniscrews was excellent (97.9%) in the cases examined. Cox regression analysis showed no difference in the overall survival rates of miniscrews loaded with different appliances for sex (hazard ratio, 0.95 95% confidence interval, 0.71-1.27 P = 0.73) after adjusting for appliance and age.

 Conclusions

  This study shows that miniscrews placed in the paramedian anterior palate for supporting various orthodontic appliances have excellent survival.

 Source: American Journal of Orthodontics & Dentofacial Orthopedics

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