Comparison of palatal movement of maxillary second molar with two methods

Objective To evaluate characters of micro-implant anchorage and intraoral anchorage during maxillary second molars mesialization in Class I malocclusal patients.Methods 24 patients were divided into two groups equally.Measuring movement speed and position changes of maxillary second molars from buccopalata and vertical position.Results In implant anchorage group:the velocity of maxillary second molar was 0.86 mm per month,palatal movement 3.8mm,intrusive movement 0.45mm.In intraoral anchorage group: the velocity of maxillary second molar was 0.65 mm per month,palatal movement 4.0 mm,extrusive movement 1.86 mm.Conclusion Two methods successfully palatalize maxillary molars to appropriate positions.But implant anchorage is stronger and faster than another.Then move mode of maxillary molar differenciate from each other.