TR Ministry of Health, Ankara, Turkey.
Department of Orthodontics, Gulhane Faculty of Dental Medicine, University of Health Sciences, Ankara, Turkey, 06010.
Clin Oral Investig. 2024 Feb 16;28(2):153. doi: 10.1007/s00784-024-05556-y.
Palatal rugae are frequently used in the evaluation of tooth movement after treatment in orthodontics and as a stable region in superimposition. It is important to note that the impression method and material used to record the rugae region affect the accuracy of the impression. The aim of this study is to compare the accuracy of palatal rugae, in three-dimensional (3D) by employing both conventional and digital impression methods.
In this study, 22 patients (12 females, 10 males) mean age of 13.5 ± 1.7 years old were selected with complete permanent dentition. Three different impressions were taken from the maxillae of the patients: conventional impression using silicone rubber impression material, conventional impression using alginate impression material, and optical impression using an intraoral scanner. The impressions' digital data were analyzed by the GOM Inspect (Version 2018, Braunschweig, Germany), a 3D analysis software. The Root Mean Square (RMS) values of the total ruga region were evaluated in this software. The data were statistically analyzed using the Jamovi program. The Kruskal-Wallis test and Mann-Whitney U test were performed due to the non-normal distribution of the data.
There is no statistically significant difference between the comparison points of the right and left rugae's medial and lateral points and total rugae regions' RMS values. Although there was no statistically significant difference, the total RMS values of alginate and digital scan measurements showed closer results than the RMS values of silicone and digital scan measurements.
The study found that there was no statistically significant difference in the total RMS values of the ruga region between traditional and digital impression methods.
The treatment period in orthodontics is long. Different impression materials and methods can be used for diagnostic, mid-treatment, and final impressions. For superimpositions and treatment and post-treatment palatal ruga evaluations, traditional and digital impression methods are clinically acceptable and can be used as alternatives to each other.
腭皱襞常用于评估正畸治疗后牙齿的移动，并作为重叠中的稳定区域。需要注意的是，用于记录皱襞区域的印模方法和材料会影响印模的准确性。本研究的目的是比较传统和数字印模方法在三维（3D）中腭皱襞的准确性。
本研究选择了 22 名患者（12 名女性，10 名男性），平均年龄为 13.5±1.7 岁，均具有完整的恒牙列。从患者的上颌制取三种不同的印模：硅橡胶印模材料的传统印模、藻酸盐印模材料的传统印模和口腔内扫描仪的光学印模。使用 3D 分析软件 GOM Inspect（版本 2018，德国不伦瑞克）对印模的数字数据进行分析。在该软件中评估总皱襞区域的均方根（RMS）值。使用 Jamovi 程序对数据进行统计分析。由于数据呈非正态分布，因此进行了 Kruskal-Wallis 检验和 Mann-Whitney U 检验。
右、左皱襞的内侧和外侧点以及总皱襞区域 RMS 值的比较点之间没有统计学上的显著差异。虽然没有统计学上的显著差异，但藻酸盐和数字扫描测量的总 RMS 值比硅橡胶和数字扫描测量的 RMS 值更接近。
本研究发现，传统和数字印模方法在皱襞区域的总 RMS 值方面没有统计学上的显著差异。
正畸治疗的周期较长。可以使用不同的印模材料和方法进行诊断、中期和最终印模。对于重叠和治疗前后腭皱襞评估，传统和数字印模方法在临床上均可接受，可以相互替代。
