Menini Anna, Cozzani Mauro, Sfondrini Maria Francesca, Scribante Andrea, Cozzani Paolo, Gandini Paola
Unit of Orthodontics and Paediatric Dentistry, Department of Clinical, Diagnostic and Paediatric Sciences, School of Dentistry, University of Pavia, Pavia, Italy.
Prog Orthod. 2014 Dec 30;15(1):70. doi: 10.1186/s40510-014-0070-9.
The purpose of this clinical longitudinal study was to investigate the effectiveness of indirect bonding technique evaluating the number of bond failures which occurred during treatment.
Fifty-two patients were selected and divided into two groups: group A (33 patients) bonded with the direct technique and group B (19 patients) bonded with the indirect technique. The number and date of bracket failure were recorded for over 15 months. Moreover, also the effect of crowding level on bracket failures was calculated. Statistical analysis was performed by means of t-test, Kaplan-Meier survival estimates and chi-squared test.
No statistically significant differences were found in the total bond failure rate between direct and indirect techniques, also when comparing the upper and lower arches. The only significant difference was found comparing the posterior segment of the lower arches, in which a higher percentage of detachments were recorded in group B, bonded with the indirect technique. Moreover, no significant differences between direct and indirect bonding were found when evaluating crowding level.
Orthodontic practitioners can safely use the indirect bonding technique, even in patients with severe crowding, because it does not influence the adhesive quality and the bracket survival rate.
本临床纵向研究的目的是通过评估治疗期间发生的粘结失败数量来研究间接粘结技术的有效性。
选取52例患者并分为两组：A组（33例患者）采用直接技术粘结，B组（19例患者）采用间接技术粘结。记录托槽失败的数量和日期，为期超过15个月。此外，还计算了拥挤程度对托槽失败的影响。采用t检验、Kaplan-Meier生存估计和卡方检验进行统计分析。
直接技术和间接技术之间的总粘结失败率没有统计学上的显著差异，比较上下牙弓时也是如此。唯一显著的差异是在比较下牙弓的后段时发现的，采用间接技术粘结的B组记录到更高比例的托槽脱落。此外，在评估拥挤程度时，直接粘结和间接粘结之间没有显著差异。
正畸医生可以安全地使用间接粘结技术，即使是在严重拥挤的患者中，因为它不会影响粘结质量和托槽存活率。
