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Two-dimensional versus three-dimensional Frӓnkel Manoeuvre: a reproducibility study.

二维与三维fr nnkel操作: 可重复性研究。

  • 影响因子:1.83
  • DOI:10.1093/ejo/cjz081
  • 作者列表:"Rongo R","Bucci R","Adaimo R","Amato M","Martina S","Valletta R","D'antò V
  • 发表时间:2020-04-01
Abstract

BACKGROUND/OBJECTIVES:To assess intra- and inter-observer reproducibility of the evaluation of the Frӓnkel Manoeuvre (FM) on three-dimensional (3D) scans and to compare it to the assessment on two-dimensional (2D) pictures. MATERIALS/METHODS:This study included 44 individuals with a skeletal Class II malocclusion [9-16-years old mean age ± standard deviation: 13.5 ± 2.01 years]. All patients had a full Class II molar relationship, overjet ≥6 mm and point A, Nasion, point B angle (ANB) ≥5 degrees. During the FM, each patient was invited to bite in centric occlusion and then to posture the mandible forward to reach a Class I molar relationship. The FM was recorded both by a normal camera and a 3D scanner (3dMD system). Six examiners divided into two groups according to their orthodontic clinical experience (<5 and >10 years), and one gold standard in the evaluation of FM, commented twice (every 15 days) on both 2D photographs (T0 and T2) and 3D scans (T1 and T3). The intra-observer agreement and the inter-observer agreement compared to the gold standard were evaluated by computing the Cohen's K. RESULTS:The agreement between observations for each examiner ranged from 0.36 to 1 on 2D pictures (T0 versus T2), and from 0.22 to 0.69 on 3D scans (T1 versus T3). The overall agreement was 0.63 (95 per cent CI = 0.35-0.91) in 2D analysis and 0.5 (95 per cent CI = 0.35-0.64) in 3D analysis. CONCLUSIONS/IMPLICATIONS:The FM was less reproducible when performed on 3D records than on 2D pictures.

摘要

背景/目的: 评估三维 (3D) 扫描上的fr ӓnkel操作 (FM) 评估的观察者内和观察者间再现性,并将其与二维 (2D) 图片评估进行比较。 材料/方法: 本研究包括44例骨性II类错 [9-16岁平均年龄 ± 标准差: 13.5 ± 2.01岁] 个体。所有患者均有完整的II类磨牙关系,overjet ≥ 6毫米 ° 和a点,Nasion,B点角 (ANB) ≥ 5 °。在FM期间,每个患者被邀请以中心咬合咬合,然后将下颌骨向前定位以达到I类磨牙关系。通过普通相机和3D扫描仪 (3dMD系统) 记录FM。根据其正畸临床经验 (<5年和> 10年) 将六名检查者分为两组,并且在FM的评估中有一个金标准,在2D照片 (T0和T2) 和3D扫描 (T1和T3) 上评论两次 (每15天)。通过计算Cohen's K来评估观察者内部协议和与黄金标准相比的观察者间协议。 结果: 每个检查者的观察结果之间的一致性在2D图片上从0.36到1 (T0对T2),以及在3D扫描上从0.22到0.69 (T1对T3)。2D分析的总体一致性为0.63 (95% CI = 0.35-0.91),3D分析的总体一致性为0.5 (95% CI = 0.35-0.64)。 结论/影响: 当在3D记录上比在2D图片上进行时,FM的可重复性较低。

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影响因子:2.98
发表时间:2020-01-01
DOI:10.1136/neurintsurg-2019-014962
作者列表:["Guo W","Liu H","Tan Z","Zhang X","Gao J","Zhang L","Guo H","Bai H","Cui W","Liu X","Wu X","Luo J","Qu Y"]

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