Zhang Manjin, Hattori Mariko, Akiyama Masako, Elbashti Mahmoud E, Liu Rongguang, Sumita Yuka I
Stomatological Hospital, Southern Medical University, Guangzhou, China.
Department of Maxillofacial Prosthetics, Tokyo Medical and Dental University, Tokyo, Japan.
J Prosthodont Res. 2023 Jan 6;67(1):87-92. doi: 10.2186/jpr.JPR_D_21_00033. Epub 2022 Apr 5.
This study aimed to evaluate the stability of the surface of the maxillary teeth and mucosa in cleft lip and palate (CLP) patients with a maxilla defect or tissue deficiency according to the duration of observation and cleft type.
Pairs of maxillary casts taken from 18 patients at different time points after prosthodontic treatment were investigated in this study. All 36 casts were scanned with an intraoral scanner, and the acquired images were saved in standard tesselation language (STL) files. The two STL files for each patient were then superimposed using three-dimensional (3D) evaluation software, with 3D deviations shown as a color map. Areas with a 3D deviation within ±0.100 mm were defined as stable. The influence of cleft type and duration of observation on the ratio of stable areas to the entire maxillary surface comprising the teeth and mucosa was investigated using multiple regression analysis. Statistical significance was set at p <0.05.
Multiple regression analysis showed that the duration of observation was significantly associated with the stable area ratio (B = -23.463, P<.001), whereas cleft type was not (β = 0.13, P = 0.301).
The maxillary teeth and mucosa of CLP patients changed over time, with stable areas showing a negative correlation with the observation period. However, the stability of the dental arch was not significantly affected by the cleft type. 3D analysis of the casts of CLP patients allowed for measurements and to accurately assess relapse of the maxillary arch after prosthetic treatment.
本研究旨在根据观察时间和腭裂类型，评估患有上颌骨缺损或组织缺失的唇腭裂（CLP）患者上颌牙齿和黏膜表面的稳定性。
本研究调查了18例患者在义齿修复治疗后不同时间点获取的上颌模型。使用口腔内扫描仪对所有36个模型进行扫描，并将获取的图像保存为标准三角形语言（STL）文件。然后，使用三维（3D）评估软件将每位患者的两个STL文件进行叠加，3D偏差以彩色地图显示。3D偏差在±0.100 mm以内的区域定义为稳定区域。使用多元回归分析研究腭裂类型和观察时间对稳定区域与包括牙齿和黏膜在内的整个上颌表面面积之比的影响。统计学显著性设定为p<0.05。
多元回归分析表明，观察时间与稳定面积比显著相关（B = -23.463，P<0.001），而腭裂类型则不然（β = 0.13，P = 0.301）。
唇腭裂患者的上颌牙齿和黏膜随时间变化，稳定区域与观察期呈负相关。然而，牙弓的稳定性不受腭裂类型的显著影响。对唇腭裂患者模型进行3D分析有助于测量并准确评估义齿修复治疗后上颌牙弓的复发情况。
