背景:压电切开术是一种旨在加速牙齿移动的微创手术方法。然而,它的作用被发现是短暂的,与区域加速现象(RAP)有关。因此,该研究的目的是评估单个和多个压电切开术对正畸牙齿移动率(OTM)的影响。此外,已经评估了两种方案对犬倾倒和正畸诱导的炎性牙根吸收(OIIRR)的影响。
方法:本开口研究招募了30名上颌第一前磨牙治疗性拔除患者,他们被随机分成两组,每个包括15个科目。在单一应用程序组(SAG)中,在犬退缩开始之前,上颌弓的一侧任意接受了一次压迫,而在多应用组(MAG)中,在一侧随机进行了压电手术,每月三次,在12周的研究期间。两组的对侧作为对照。使用镍钛封闭螺旋弹簧对犬进行双侧收缩,提供150克的力,和牙齿移动的速度,以及每月对犬类小费进行评估,在3个月的时间里。锥豆计算机断层扫描也进行了前后犬牙收缩,OIIRR使用Malmgren指数进行评估。
结果:报告的结果显示犬类收缩量显著增加,犬类小费,以及两组SAG和MAG回缩后的实验侧牙根吸收评分(p<0.001)。然而,通过比较两组的实验双方,在所有评估结局方面,两组间均无显著性差异(p>0.05).
结论:与传统正畸治疗相比,单胎和多胎切术可有效加速OTM,两种干预频率报告的相对结果。因此,建议使用单压电切开术作为OTM的辅助手段。此外,与OTM结合使用的单次和多次压电切开术都伴随着明显的牙齿倾斜以及明显更高的牙根吸收风险。
■Clinicaltrials.gov审判注册编号:NCT05782088注册日期:23/03/2023\“回顾性注册”。URL:https://clinicaltrials.gov/ct2/show/NCT05782088。
BACKGROUND: Piezocision is a minimally invasive surgical method aiming to accelerate tooth movement. However, its effect was found to be transient, appertaining to the regional acceleratory phenomenon (RAP). Hence, the aim of the
study was to evaluate the effect of single and multiple piezocisions on the rate of orthodontic tooth movement (OTM). Moreover, the impact of both protocols on canine tipping and orthodontically induced inflammatory root resorption (OIIRR) has been assessed.
METHODS: Thirty indicated patients for the therapeutic extraction of maxillary first premolars were enlisted in this split-mouth
study, and they were randomly split into two equal groups, each including 15 subjects. In the Single Application Group (SAG), one side of the maxillary arch arbitrarily received a single piezocision before the onset of canine retraction, whereas in the Multiple Application Group (MAG), piezocisions were randomly performed on one side, three times on a monthly basis, over the 12-week
study period. The contralateral sides of both groups served as the controls. Canine retraction was carried out bilaterally using nickel-titanium closed-coil springs, delivering 150 g of force, and the rate of tooth movement, as well as canine tipping were evaluated on a monthly basis, over a 3-month period. Cone-bean computed tomography scans were also conducted pre- and post- canine retraction, and OIIRR was assessed using Malmgren Index.
RESULTS: The reported outcomes revealed a significant increase in the amount of canine retraction, canine tipping, as well as root resorption scores on the experimental sides in both groups SAG and MAG post-retraction (p < 0.001). However, upon comparing the experimental sides in both groups, non-significant differences have been observed between them regarding all the assessed outcomes (p > 0.05).
CONCLUSIONS: Single and multiple piezocisions effectively accelerate OTM in comparison to conventional orthodontic treatment, with relative outcomes reported by both intervention frequencies. Accordingly, single piezocision is recommended as an adjunct to OTM. Furthermore, significant tooth tipping as well as a significantly higher root resorption risk accompanies both single and multiple piezocision applications in conjunction with OTM.
UNASSIGNED: Clinicaltrials.gov
TRIAL REGISTRATION NUMBER: NCT05782088 DATE OF REGISTRATION: 23/03/2023 \"Retrospectively registered\". URL: https://clinicaltrials.gov/ct2/show/NCT05782088.