Pandis N, Vlachopoulos K, Polychronopoulou A, Madianos P, Eliades T
Department of Preventive and Community Dentistry, School of Dentistry, University of Athens, Athens, Greece.
Orthod Craniofac Res. 2008 Nov;11(4):211-5. doi: 10.1111/j.1601-6343.2008.00432.x.
To explore whether the use of self-ligating brackets is associated with better values for periodontal indices because of the lack of elastomeric modules and concomitantly, reduced availability of retentive sites for microbial colonization and plaque accumulation.
Private practice of the first author. Patients were selected using the following inclusion criteria: age range 12-17 years, fixed appliances on both arches, aligned mandibular arch, and absence of oral habits and anterior crossbites.
Prospective cohort investigation. Participants were grouped for bracket type, thus 50 patients formed the conventional bracket cohort and 50 patients the self-ligating bracket cohort. Both cohorts were followed with the purpose to examine periodontal status. Average length of follow-up was 18 months. This time period was considered adequate for a proportion of study participants to experience the outcome of interest. Outcome variables were plaque index, gingival index, calculus index, and probing depth for the two bracket cohorts.
No difference was found in the indices recorded between the two bracket cohorts studied.
Under the conditions as applied in this study, the self-ligating brackets do not have an advantage over conventional brackets with respect to the periodontal status of the mandibular anterior teeth.
由于自锁托槽缺少弹性模块，从而减少了微生物定植和菌斑积聚的固位位点，探讨使用自锁托槽是否与更好的牙周指数值相关。
第一作者的私人诊所。采用以下纳入标准选择患者：年龄范围12 - 17岁，双侧牙弓均有固定矫治器，下颌牙弓排列整齐，无口腔不良习惯和前牙反牙合。
前瞻性队列研究。根据托槽类型对参与者进行分组，因此50名患者组成传统托槽队列，50名患者组成自锁托槽队列。对两个队列进行随访以检查牙周状况。平均随访时间为18个月。这段时间被认为足以让一部分研究参与者经历感兴趣的结果。结果变量为两个托槽队列的菌斑指数、牙龈指数、牙石指数和探诊深度。
在所研究的两个托槽队列之间记录的指数中未发现差异。
在本研究应用的条件下，就下颌前牙的牙周状况而言，自锁托槽并不比传统托槽具有优势。
