Miniscrew biomechanics: Guidelines for the use of rigid indirect anchorage mechanics

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Indirect anchorage is an established form of anchorage provided by orthodontic miniscrews. Although there are different ways to set up the mechanics, rigid indirect anchorage offers the greatest biomechanical versatility but is more difficult to install than conventional, nonrigid indirect anchorage or direct anchorage. The purpose of this article was to introduce readers to the concept of rigid indirect anchorage and provide guidelines as to its use.HighlightsFor indirect anchorage, anchorage elements should be aligned with the line of action of the orthodontic force.Rigid anchorage allows for greater freedom of insertion site selection.Basic engineering concepts can aid in understanding the preferred setup of indirect anchorage.

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