RESUMEN
Objective To study the application of micro -screw implant anchorage combined with segmental arch technique on posterior teeth in elongated jaw to depress edentulous area.Methods 29 adult patients with 31 posterior teeth were depressed with micro -screw implant as skeletal anchorage combined with segmental arch tech-nique in order to help restoration.Results 31 posterior teeth in the experimental group were successfully depressed to the occlusal plane with micro -screw implant anchorage combined with segmental arch technique in order to create restoration space in edentulous area with an average course of treatment of 10 months.29 posterior teeth in the control group were grinded and given root canal therapy to create restoration space in edentulous area.Conclusion The ap-plication of micro -screw implant anchorage combined with segmental arch technique on posterior teeth in elongated jaw to depress edentulous area is an effective straightening method, whereas grinding is the last resort in creating res-toration space in edentulous area.Because patients in primary hospitals have relatively low oral health awareness, some hope for faster and easier solutions and find it difficult to accept traumatic micro -screw implant.