Comparison of palatal volume and surface changes between bone-borne and tooth-tissue-borne maxillary expansion on cone beam computed tomography digital cast models.

IF 3 2区 医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Angle Orthodontist Pub Date : 2023-01-31 DOI:10.2319/040922-278.1
Reham Abdelsalam, Ludovica Nucci, Rossella Carrino, Shereef Shahen, Fatma Abdelaziz, Fady Fahim, Letizia Perillo
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Abstract

Objectives: To compare the changes of palatal volume and area in patients treated with tooth-tissue-borne palatal expanders (conventional Haas) and miniscrew-supported palatal expanders (modified Haas).

Materials and methods: The sample included casts of 22 patients treated as part of a clinical study at the Department of Orthodontics, Al-Azhar University, to correct their crossbite malocclusion. Patients were divided equally into two groups upon arrival. The first group, with a mean age of 12 years and 6 months, received the miniscrew-supported palatal expander. The second group, with a mean age of 12 years and 2 months, received the Haas design-palatal expansion appliance. Pre- and post-expansion dental casts were cone beam computed tomography scanned and the slices were constructed into 3D volumes. Fully automated superimposition was done for pre- and post-expansion 3D models. Palatal volume and area were determined, and all measurements were carried out blindly. Paired t-test was used to assess the mean differences within each group and Welch's t-test was applied to assess the mean changes between the two groups. Shapiro-Wilk test was used to test for the normality of the data.

Results: There were no statistical differences in volume changes either within each group or between the groups. Although area changes were statistically significant within each group, the difference between the groups was not significant.

Conclusions: Changes that result from the use of either method to expand the upper arch occur primarily in the shape of the palate, but not in its size.

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在锥形束计算机断层扫描数字铸模上比较骨载和牙组织载上颌骨扩张时腭部体积和表面的变化。
目的比较使用牙组织承托腭部扩张器(传统哈斯)和微型螺钉支撑腭部扩张器(改良哈斯)治疗的患者腭部体积和面积的变化:样本包括在爱资哈尔大学正畸学系进行的一项临床研究中接受治疗的 22 名患者的模型,以矫正他们的交叉咬合畸形。患者到达后被平均分为两组。第一组平均年龄为 12 岁零 6 个月,接受微型螺钉支撑式腭侧扩张器。第二组平均年龄为12岁零2个月,使用哈斯设计的腭部扩张器。对扩张前和扩张后的牙模进行锥形束计算机断层扫描,并将切片构建成三维体积。扩张前和扩张后的三维模型进行了全自动叠加。测定腭部体积和面积,所有测量均在盲法下进行。采用配对 t 检验评估各组内的平均差异,采用韦尔奇 t 检验评估两组间的平均变化。Shapiro-Wilk 检验用于检验数据的正态性:各组内或组间的体积变化均无统计学差异。尽管各组内的面积变化具有统计学意义,但组间差异并不显著:结论:使用这两种方法扩大上牙弓所产生的变化主要发生在上腭的形状上,而不是其大小上。
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来源期刊
Angle Orthodontist
Angle Orthodontist 医学-牙科与口腔外科
CiteScore
6.40
自引率
5.90%
发文量
95
审稿时长
3 months
期刊介绍: The Angle Orthodontist is the official publication of the Edward H. Angle Society of Orthodontists and is published bimonthly in January, March, May, July, September and November by The EH Angle Education and Research Foundation Inc. The Angle Orthodontist is the only major journal in orthodontics with a non-commercial, non-profit publisher -- The E. H. Angle Education and Research Foundation. We value our freedom to operate exclusively in the best interests of our readers and authors. Our website www.angle.org is completely free and open to all visitors.
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