激光联用洁治改善固定正畸患者牙周状况的临床研究

The curative effects of Nd:YAG laser therapy cooperates with ultrasonic scaling on ameliorating periodontal status of the patients with fixed orthodontic appliances

目的:评价Nd:YAG激光辅助改善固定正畸患者牙周状况的效果。方法:选择60例接受固定正畸治疗的男性患者,以右下颌第一磨牙为实验牙,左下颌第一磨牙为对照牙,分别比较它们在正畸治疗开始前、激光、超声洁牙和两者联用治疗前以及3种治疗1周和6个月后的龈沟液(GCF)量、天门冬氨酸氨基转移酶(AST)与碱性磷酸酶(ALP)水平的变化。结果:激光治疗、超声洁治术以及两者联用均能在短期内降低GCF量、ALP及AST水平(P<0.05),但激光治疗和两者联用后局部GCF量、AST及ALP水平较超声洁牙后降幅更大(P<0.05);3组6个月后GCF量、ALP及AST水平均有所提高(P<0.05),但联用组提高较少(P<0.05)。结论:Nd:YAG激光可应用于固定正畸患者以改善其牙周状况,若能配合超声洁治,效果更理想。

Objective：To evaluate the curative effects of Nd：YAG laser combined with ultrasonic scaling on the periodontal status of patients with fixed orthodontic appliances. Methods： 60 male fixed orthodontic patients were selected. The right mandibular first molar was used as experimental tooth and left one as control tooth respectively. The quantities of gingval crevicular fluid（GCF） and the levels of alkaline phosphatase（ALP） and aspartate amino transferase（AST） were compared among Nd：YAG laser group, ultrasonic scaling group and two treatments combined group. The observing time points were 1 week and 6 months after laser, scaling and cooperating therapies. Results： Laser, uhrasonic scaling and laser cooperated with ultrasonic scaling therapies reduced the quantities of GCF and degraded the levels of ALP and AST（ P 〈 0.05 ）. However, the reduced amplitude of GCF, ALP and AST after laser and cooperating treatments were more obviously than ultrasonic scaling ones （P 〈 O. 05 ）. The GCF, ALP and AST of the cooperating therapy were less than the other two groups（ P 〈 0.05 ） after 6 months though these of the three therapies were in- creased （ P 〈 0.05 ）. Conclusion： Nd： YAG laser therapy may be used in ameliorating the periodontal status of fixed orthodontic patients. Nd：YAG laser therapy combined with ultrasonic scaling have a better clinical effects.