Clinical application of mini-screw implant as anchorage for extruded molar intrusion in dentition defect

Objective:To show the efficiency of mini-screw implants as anchorage for extruded molar intrusion in dentition defect.Methods:Eleven patients(5 males,6 females)with over-erupted first maxillary molars were selected,aging from 18 to 40 years old,the average age was 26 years old.9 patients missed one side mandibular first molar,2 patients missed bilateral mandibular first molar.All the extruded first maxillary molars were intruded in gingival direction with mini-screw implants anchorage.Lateral cephalograms and orthopantomography were taken at the beginning and the end of the treatment.The movement of molars in vertical dimension was analyzed.Results:The extruded first maxillary molars were average intruded 3.0 mm averagely in 5 month.All of the missing teeth were treated by implant teeth or fixed prosthetic treatment.Conclusion:Mini-srcew implant as anchorage is an effective method to intrude the extruded maxillary molars.