Clinical Study Of Mini-implant Anchorage In Adult Orthodontics

Objective: Investigate the application of mini-implant anchorage to adult orthodontics, and obtain the experience to favor it further clinical use and the better treatment result.Methods: Mini-implant was used in ten cases as orthodontics anchorage. Three of the ten were adult denture crowded patients, the others were adults with bimaxillary protrusion. MAS mini-implant were implanted in 15, 16 and 25, 26 separately. The mini-plants were utilized with the rubber chain, ligature silk to move the cuspid to diatal and to adduct the anterior teeth. Through measureing the cephalometric films before and after treatment, the moving amount of the upper incisor and the upper first molar were observed, the anchorage lever which mini-implantant offered was judged, its clinical stability, success rate, cooperation degree and adaptability of patients were assessed, the influence factors that causes its rupture, loose and formulate solutions were analysed.Results: After 6~7 months the dentures in crowded patients were arranged neatly, the upper first molars were moved 0.31mm mesially evenly, and the upper incisors were moved 0.20mm labially evenly. After 4~8 months, in adult bimaxillary protrusion patients, cuspids were moved to distal, the upper first molars were moved 1.12mm mesially evenly, and the upper incisors were moved 7.91mm palatelly evenly. In all cases, soft tissue around the implants were well-being. Patients have good adaptability and comfortable.Conclusion: Miniimplant anchorage definitely can replace traditional strong anchorage, if infection can be controlled before and after operation. The patients have good adaptability and comfortable.