In 1960s, Br?nemark et al noticed the biocompatibility of titanium screws in bone tissue. Light microscopic examinations showed bone-to-implant contact; thus, the concept of "osseointegration" developed . Mini implant are introduced which produce desired tooth movement in any direction without any anchor loss.To no longer depend on patients' compliance, several devices and techniques have been introduced as alternative means of skeletal anchorage: conventional dental implants , special intraoral implants, onplants, zygoma wires , intentionally ankylosed teeth , miniscrews, miniplates