Vaida Luminita Ligia, Bud Eugen Silviu, Halitchi Liliana Gabriela, Cavalu Simona, Todor Bianca Ioana, Negrutiu Bianca Maria, Moca Abel Emanuel, Bodog Florian Dorel
Department of Dentistry, Faculty of Medicine and Pharmacy, University of Oradea, 1 Universitatii Str., 410087 Oradea, Romania.
Department of Orthodontics, University of Medicine and Pharmacy Science and Technology G.E Palade, 38 Gh. Marinescu Str., 540139 Targu Mures, Romania.
Children (Basel). 2020 Dec 16;7(12):295. doi: 10.3390/children7120295.
The Hawley retainer (HR) and the vacuum-formed retainer (VFR) are the most common removable retainers in orthodontic treatments. The aim of this retrospective study was to comparatively analyze the behavior of two types of removable retainers-HRs and VFRs-in terms of retainer damage, loss, and the rate of installation of mild or severe relapse that required recourse to certain therapeutic interventions. The study was performed on 618 orthodontic patients aged 11-17 years, average age 13.98 ± 1.51, out of which 57% were patients having VFRs and the remaining 43% having HRs in the upper arch. We performed an analysis of the two groups of patients-HRs group and VFRs group-at 6 months (T1) and at 12 months (T2) after the application of the retainer. The results showed that 6% of all the retainers were damaged, mostly at T2 (54.1%). Seven percent of all the retainers were lost, mostly at T1 (58.1%). Of all the patients, 9.1% presented mild relapse, mostly at T1 (58.9%), while 2.6% presented severe relapse. The VFRs were significantly more frequently associated with the occurrence of damage than the HRs ( < 0.001). Severe relapse was more frequently associated with the HRs rather than with VFRs ( < 0.05).
霍利保持器（HR）和真空压膜保持器（VFR）是正畸治疗中最常见的可摘保持器。这项回顾性研究的目的是比较分析两种可摘保持器——HR和VFR——在保持器损坏、丢失以及需要采取某些治疗干预措施的轻度或重度复发发生率方面的表现。该研究针对618名年龄在11至17岁之间的正畸患者进行，平均年龄为13.98±1.51岁，其中57%的患者上颌使用VFR，其余43%的患者上颌使用HR。我们在佩戴保持器后的6个月（T1）和12个月（T2）对两组患者——HR组和VFR组——进行了分析。结果显示，所有保持器中有6%损坏，大部分发生在T2（54.1%）。所有保持器中有7%丢失，大部分发生在T1（58.1%）。在所有患者中，9.1%出现轻度复发，大部分发生在T1（58.9%），而2.6%出现重度复发。VFR与损坏发生的关联明显比HR更频繁（<0.001）。重度复发与HR的关联比与VFR更频繁（<0.05）。
