微创骨皮质切开术加速成人正畸牙移动的临床研究

目的:探讨微刨骨皮质切开术对成人正畸拔牙病例治疗时间及磨牙支抗的影响.方法:选择拔除4颗第一前磨牙的Angle Ⅰ牙列拥挤错(牙合)畸形的健康成人患者60例,分为微创骨皮质切开术辅助正畸治疗组(A组,20例)、经典改良骨皮质切开术辅助正畸治疗组(B组,20例)和单纯正畸治疗组(C组,20例).比较3组排齐整平、间隙关闭、精细调整等各阶段所用的时间和治疗的总时间;并比较3组支抗第一磨牙矢状向近中前移的量.结果:在排齐整平阶段,A、B、C组分别为(5.64±2.57)、(4.91±3.31)、(8.87±3.75)个月(A组与B或C组比较,P＜0.01);在间隙关闭阶段分别为(6.84 ±2.69)、(6.64±3.87)、(8.63±3.29)个月(A组与B或C组比较,P＜0.05);3组在精细调整阶段并无明显差异;总的治疗时间,A、B、C组分别为(16.07±6.21)、(15.77±5.11)、(21.94 ±5.74)个月(C组分别与A组和B组比较,P＜0.01);3组在支抗第一磨牙矢状向近中前移的量并无明显差异(P＞0.05).结论:微创骨皮质切开术能缩短矫治时间,不能减少前牙内收阻力.

Clinical study of accelerating orthodontic tooth movement by minimally invasive corticotomy

Objective:To evaluate the influence of minimally invasive corticotomy on the treatment time and molar anchorage of adult orthodontic extraction cases.Methods:60 adult cases of Angle Class Ⅰ crowding malocclusion were devided into 3 groups (n =20) and treated by orthodontic treatment wtih minimally invasive corticotomy(group A),orthodontic treatment with classic modified corticotomy(group B) and routine orthodontic treatment (group C) respectively.Time needed for leveling and alignment,space closure,delicate adjustment,total treatment time and mesial sagittal antedisplacement of first molar anchorage were compared among the 3 groups.Results:Time needed for leveling and alignment of orthodontic treatment of group A,B and C was (5.64 ± 2.57),(4.91 ± 3.31) and (8.87 ± 3.75) months respectively(C vs A or B,P ＜ 0.01).Time needed for space closure of group A,B and C was (6.84 ± 2.69),(6.64 ± 3.87) and (8.63 ± 3.29) months respectively(C vs A or B,P ＜0.01).Time needed for delicate adjustment showed no significant difference among the 3 groups(P ＞ 0.05).Total treatment time of group A,B and C was (16.07 ± 6.21),(15.77 ± 5.11)and (21.94 ± 5.74) months respectively (C vs A or B,P ＜ 0.01).There was on statistical difference of mesial sagittal antedisplacement of first molar anchorage among the 3 groups.Conclusion:Minimally invasive corticotomy can shorten the orthodontic treatment time,but can not decrease the retraction resistance of the anterior teeth.