One of the factors that determine the survival of the miniscrews used as orthodontic anchorage is the primary stability. The objective of this review is to study what factors about the technique, the patient and the miniscrews are related to the primary stability, and if the primary stability is associated with success or secondary stability. Method. A strategy of electronic search for several data bases is developed, using a combination of controlled vocabulary and free-text terms, and it’s complemented by a manual search. Conclusions. Tapered forms, selfdrilling miniscrews and those of greater length and diameter show more primary stability. Greater depth and diameter of drill showed lower primary stability. To further increased cortical thickness primary stability. There is no relationship between the primary and secondary stability. It seems that there is relationship between certain range of primary stability and survival of the miniscrew.
(Rev Esp Ortod. 2011;41(3):159-163)