Essix保持器和Hawley保持器固位特征的比较。
Comparison of retention characteristics of Essix and Hawley retainers.
作者信息
Demir Abdullah, Babacan Hasan, Nalcacı Ruhi, Topcuoglu Tolga
机构信息
Department of Orthodontics, Faculty of Dentistry, Selcuk University, Konya, Turkey.
出版信息
Korean J Orthod. 2012 Oct;42(5):255-62. doi: 10.4041/kjod.2012.42.5.255. Epub 2012 Oct 29.
OBJECTIVE
We aimed to compare the retention characteristics of Essix and Hawley retainers.
METHODS
Adolescents undergoing fixed appliance treatment at 2 centers were recruited for this study. Twenty-two patients (16 women and 6 men) wore Essix retainers (Essix group) while 20 (14 women and 6 men) wore Hawley retainers (Hawley group). The mean retention time was 1 year, and the mean follow-up recall time for both groups was 2 years. Two qualified dental examiners evaluated the blind patient data. Maxillary and mandibular dental casts and lateral cephalograms were analyzed at 4 stages: pretreatment (T1), post-treatment (T2), post-retention (T3), and follow-up (T4).
RESULTS
The results revealed that Essix appliances were more efficient in retaining the anterior teeth in the mandible during a 1-year retention period. The irregularity index increased in both arches in both groups after a 2-year post-retention period. The mandibular arch lengths increased during treatment and tended to return to their original value after retention in both groups; however, these changes were statistically significant only in the Hawley group. Cephalometric variables did not show any significant differences.
CONCLUSIONS
The retention characteristics of both Essix and Hawley retainers are similar.
目的
我们旨在比较Essix保持器和Hawley保持器的固位特征。
方法
本研究招募了在2个中心接受固定矫治器治疗的青少年。22例患者（16名女性和6名男性）佩戴Essix保持器（Essix组），而20例（14名女性和6名男性）佩戴Hawley保持器（Hawley组）。平均保持时间为1年，两组的平均随访召回时间为2年。两名合格的牙科检查人员对盲态的患者数据进行评估。在4个阶段分析上颌和下颌牙模型及头颅侧位片：治疗前（T1）、治疗后（T2）、保持后（T3）和随访（T4）。
结果
结果显示，在1年的保持期内，Essix矫治器在下颌保持前牙方面更有效。在保持后2年，两组的两个牙弓的不整齐指数均增加。两组在治疗期间下颌牙弓长度增加，保持后趋于恢复到原始值；然而，这些变化仅在Hawley组具有统计学意义。头影测量变量未显示任何显著差异。
结论
Essix保持器和Hawley保持器的固位特征相似。
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