正畸微种植体稳定性的临床共振频率分析

发布时间：2018-08-17 18:26

【摘要】：目的:用共振频率分析法评价正畸微种植体稳定性的临床变化规律,探讨合适的加载时机及加载对微种植体稳定性的影响。方法:选择上颌第一前磨牙减数并需要强支抗的正畸患者14例,分为延期加载组和择期加载组各7例。每例患者在上颌后牙左右颊侧牙槽骨区植入分体式微种植体各1颗,用Osstell种植体稳定性测量仪作共振频率分析,植入后即刻及每周记录微种植体的种植体稳定性系数(implant stability quotients,ISQ值)。延期加载组在第12周加载150 g水平牵引力之前,选出ISQ值稳定的时间点,以此作为择期加载组的加载时机,施加同样大小的正畸力。2组患者均随访至16周,采用SPSS 19.0软件包对数据进行方差分析和t检验。结果:28颗微种植体中,5颗在4周内发生松动而取出,剩余23颗在16周内保持稳定,其中12颗延期加载组微种植体的共振频率分析显示,ISQ值在植入即刻及第1周最高(21.48±5.25),第2周到第5周逐渐下降,第6周后维持平稳(11.26±3.36)。11颗择期加载组微种植体在第6周加载牵引力。从第6周至16周,2组微种植体无论加载与否,ISQ值均无显著变化,2组间也无显著差异(P0.05)。松动微种植体的初始ISQ值显著小于非松动组。结论:微种植体植入1周后稳定性下降,6周后趋于稳定。6周后加载正畸力对稳定性无影响,而初始稳定性差是微种植体失败的重要原因。
[Abstract]:Objective: to evaluate the clinical changes of orthodontic microimplant stability by resonance frequency analysis (RFA), and to explore the appropriate loading time and its effect on the stability of orthodontic microimplants. Methods: fourteen patients with maxillary first premolar who needed strong Anchorage were divided into delayed loading group (n = 7) and selective loading group (n = 7). One split-type microimplant was implanted into the alveolar area of the right and left cheek of maxillary posterior teeth in each case. The stability coefficient of the implants (implant stability quotients ISQ) was recorded immediately and weekly after implantation by Osstell implant stability meter. In the delayed loading group, before the 150g horizontal traction was loaded at the 12th week, the stable time point of ISQ value was selected as the loading time of the selected loading group. The patients of the same size orthodontic force group were followed up to 16 weeks. SPSS 19.0 software package was used to analyze the variance and t test of the data. Results five of the 28 microimplants were loosened within 4 weeks and the remaining 23 remained stable within 16 weeks. The resonance frequency analysis of 12 microimplants in delayed loading group showed that ISQ was highest at the first week of implantation (21.48 卤5.25), decreased gradually from the 2nd week to the 5th week, and remained stable at the 6th week (11.26 卤3.36) .11 microimplants in the selective loading group were subjected to tractive force at the 6th week. From week 6 to week 16, there was no significant change in ISQ between the two groups (P0.05). The initial ISQ of loose microimplant was significantly lower than that of non-loosening group. Conclusion: the stability of microimplants decreased after 1 week and tended to stabilize after 6 weeks. After 6 weeks loading orthodontic force had no effect on the stability, but poor initial stability was the main reason for the failure of microimplants.
【作者单位】：上海交通大学医学院附属第九人民医院.口腔医学院口腔正畸科上海市口腔医学重点实验室;
【分类号】：R783.5

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