Temporary Anchorage Device Stability: Monocortical Versus Bicortical Anchorage Technique

Abstract

<p class="AbstractContent"><strong>Objective:</strong> To compare the stability of splinted and non-splinted miniscrew between monocortical and bicortical anchorage techniques.</p><p class="AbstractContent"><strong>Methods:</strong> Thirty-Six AbsoAnchor orthodontic miniscrews (10mm x 1.5mm) were divided into four groups; non-splinted monocortical, non-splinted bicortical, splinted monocortical and splinted bicortical anchorage techniques. The miniscrews were inserted into sectioned bovine bone blocks and the pull-out strength for each group of miniscrews was measured using Instron 8874; a crosshead speed of 2mm/minute was applied. Six readings were taken for each group and the mean reading for each group was obtained. The data was analyzed using one-way ANOVA test with 95% confidence interval (P<0.05).</p><p class="AbstractContent"><strong>Results:</strong> The pull-out strength mean of splinted group was observed to be statistically higher than non-splinted. The mean of the pull-out strength of bicortical was higher than monocortical in both splinted and non-splinted groups, however it is not significant.</p><p class="AbstractContent"><strong>Conclusion</strong>: Both splinted monocortical and bicortical anchorage miniscrews were significantly stable than non-splinted counterpart. However, in monocortical and bicortical anchorage, there was no significant difference of the pull-out strength between splinted and non-splinted miniscrews.</p>