Clinical analysis of different implant anchorage with headgear anchorage in treatment of maxillary dentoalveolar protrusion / 重庆医学

ABSTRACT

Objective To compare clinical effect and complications of micro-implant anchorage(MIA ) or self -driven titanium implant(SDIA) with headgear anchorage in treatment of maxillary dentoalveolar protrusion .Methods 50 patients with maxillary dentoalveolar protrusion were selected and divided into observation group and control group .Each group contained 25 patients .14 patients in observation group received MIA treatment while 11 patients received SDIA treatment .All patients in control group re-ceived headgear anchorage treatment .Comparison was made in respects of course of treatment ,clinical effect and complications .Re-sults The course of treatment in observation group was (19 .85 ± 2 .01) months while in control group was(23 .58 ± 1 .79) months . The treatment time in control group were longer than observation group (P < 0 .05) .U1-SN angle in observation group were de-creased(16 .8 ± 1 .9)° while the control group decreased(20 .2 ± 2 .1)° .In the vertical direction ,the observation group maxillary inci-sor and first molars were shorten (2 .0 ± 0 .8)mm and(1 .6 ± 1 .0)mm respectively ,while the control group were shorten (0 .7 ± 0 .5) mm and(0 .3 ± 0 .7)mm .In the sagittal direction ,the observation group maxillary first molars were moved (0 .6 ± 1 .1)mm while the control group were moved (1 .7 ± 0 .8)mm .The difference of U1-SN ,U1-X ,U6-Y ,U6-X between two group were statistically sig-nificant .The comparison of expulsion rate between MIA and SDIA had no statistical significance .But the rate inflammation symp-tom and hyperplasia of the gum in SDIA patients were higher than MIA patients .Conclusion MIA and SDIA had better ability in treatment of maxillary dentoalveolar protrusion in vertical direction than headgear and improve the curative effect of maxillary den -toalveolar protrusion and both of them had same fell off rate ,but SDIA had higher rate of inflammation .