Systematic review of mini-implant displacement under orthodontic loading

Abstract

Mini-implants provide stable anchorage for orthodontics, despite secondary movement over time, report dental researchers in Germany. When teeth are damaged due to misalignment, they must be rebuilt and carefully anchored to the jaw. Recently, developed mini-implants are useful for such anchorage, but they may move over time with use. Manuel Nienkemper and colleagues at Heinrich-Heine University in Düsseldorf reviewed 27 recent research studies about the displacement of mini-implants. They found that movement during the initial placement was insignificant, but secondary movement caused by dental forces over time could cause problems for the patient. The team emphasizes that mini-implants require a suitable bone site with a thin mucosal covering. They also suggest that implant failure could be avoided by inserting the implant slightly off-centre, leaving space in the opposite direction from the main orthodontic forces.

Keywords

displacement / migration / mini-implant / miniscrew / orthodontics / skeletal anchorage

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