Department of Oral and Maxillofacial Sciences, School of Dentistry, "Sapienza" University of Rome, Via Caserta, 6, 00161 Rome, Italy.
Department of Oral and Maxillofacial Sciences, School of Dentistry, "Sapienza" University of Rome, Via Caserta, 6, 00161 Rome, Italy.
J Stomatol Oral Maxillofac Surg. 2022 Apr;123(2):128-135. doi: 10.1016/j.jormas.2021.03.005. Epub 2021 Mar 24.
The mounting of the plaster casts on articulator procedure is routinely performed in orthognathic surgery to assess canting of the maxillary occlusal plane, but the currently used protocols and reference plane could be source of errors which affect reliability. Nowadays the assessment of canting of the maxillary occlusal plane could be also performed with an entirely digital protocol. Aim of the study was to propose a method to evaluate canting in patients affected by Unilateral Condylar Hyperplasia, comparing the measurements performed on digital models matched on CBCT with those made on traditional articulator.
A retrospective cross-sectional study was designed on 20 patients affected by vertical Unilateral Condylar Hyperplasia treated in the Units of Orthodontics and Maxillo-Facial Surgery. The canting of the maxillary occlusal plane was measured on plaster casts mounted on the conventional articulator and the measures were compared with those made on digital models matched on CBCT, according the protocol developed in our Unit. Molar, canine and basal difference were measured. To compare the two protocols and to test the agreement, we performed descriptive statistics, comparison between means and Bland Altman analysis. P value was set at 0.05.
Statistic comparison demonstrated agreement between measurements performed with the digital protocol and conventional physical method.
Measurements of canting with digital protocol are comparable to the physical standard method. A total digital protocol allows faster availability and storage of patient's data and better communication between orthodontist and maxillo-facial surgeon, especially in patients affected by three-dimensional malocclusions.
在正颌手术中，常规将石膏模型安装在牙颌架上，以评估上颌咬合平面的倾斜度，但目前使用的方案和参考平面可能是影响可靠性的误差源。如今，上颌咬合平面倾斜度的评估也可以通过完全数字化的方案来进行。本研究的目的是提出一种方法来评估单侧髁突肥大患者的倾斜度，比较在 CBCT 上匹配的数字模型上进行的测量与在传统牙颌架上进行的测量。
设计了一项回顾性的横断面研究，纳入了 20 名接受垂直型单侧髁突肥大治疗的正畸和颌面外科患者。在常规牙颌架上安装石膏模型后，测量上颌咬合平面的倾斜度，并根据我们科室制定的方案，将这些测量值与 CBCT 上匹配的数字模型上的测量值进行比较。测量了磨牙、尖牙和基骨的差异。为了比较两种方案并测试一致性，我们进行了描述性统计、均值比较和 Bland-Altman 分析。P 值设定为 0.05。
统计比较表明，数字方案和传统物理方法的测量结果具有一致性。
数字方案的倾斜测量与物理标准方法具有可比性。完全数字化的方案可以更快地获得和存储患者的数据，并加强正畸医生和颌面外科医生之间的沟通，特别是在三维错颌患者中。
