无牙颌两种印模方法的数字化模型偏差分析

doi:10.13701/j.cnki.kqyxyj.2022.03.012

口腔医学研究 ›› 2022, Vol. 38 ›› Issue (3): 252-255.DOI: 10.13701/j.cnki.kqyxyj.2022.03.012

无牙颌两种印模方法的数字化模型偏差分析

余念, 曹阳, 俞青^*

南京大学医学院附属口腔医院,南京市口腔医院修复科江苏南京 210008

收稿日期:2021-11-04 出版日期:2022-03-28 发布日期:2022-03-25
通讯作者: * 俞青,E-mail:kqmike@163.com
作者简介:余念(1992~ ),女,湖北宜城人,硕士,医师,研究方向:全口义齿的数字化修复。

Deviation Analysis of Digital Model of Edentulous Jaw with Two Impression Methods

YU Nian, CAO Yang, YU Qing^*

Department of Prosthodontics, Nangjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, China

Received:2021-11-04 Online:2022-03-28 Published:2022-03-25

摘要/Abstract

摘要： 目的: 利用数字化扫描技术和逆向工程软件探索上颌无牙颌的黏膜变化,比较不同取模方法下无牙颌模型的差异。方法: 随机抽取20名上颌无牙颌患者,通过两种不同的方法获取其上颌印模:使用有孔托盘和藻酸盐材料取传统解剖式印模,以及使用无孔托盘和硅橡胶材料取压力式印模。然后使用口外扫描仪对所有印模进行扫描并转化为数字模型。对同一患者的一对模型使用“最佳匹配法”进行配准。所得结果采用单因素方差分析进行统计分析。结果: 最佳拟合对齐方法配准后显示无牙颌解剖式模型及压力式模型整体模型、上颌硬区及后堤区黏膜偏差具有统计学差异。偏差最小的区域分布在牙槽嵴区,偏差最大的区域为后堤区。结论: 压力式印模的黏膜变形量明显高于解剖式印模,在模型整体、上颌硬区及后堤区处最为显著。

关键词: 无牙颌, 印模, 偏差, 功能区域, 最佳拟合

Abstract: Objective: To explore the mucosal changes of maxillary edentulous jaw by using digital scanning technology and reverse engineering software, and to compare the differences of edentulous jaw models under different mold taking methods. Methods: Twenty patients with edentulous maxillary were randomly selected. The maxillary impression was obtained by two different methods. The traditional anatomical impression was obtained by using a perforated tray and alginate material, and the pressure impression was obtained by using a nonporous tray and silica material. Then, all impressions were scanned with an extraoral scanner (D810, 3shape) and converted into a digital model. A pair of models of the same patient was registered using the "best matching method". Results: The best fitting alignment method showed that there was significant difference in mucosal deviation between edentulous anatomical model and pressure model. The area with the smallest deviation was located in the alveolar ridge area, and the area with the largest deviation was the postdam area. Conclusion: The mucosal deformation of pressure impression was significantly higher than anatomical impression. There are differences in the deformation of the whole model, maxillary hard area, and postdam area.

Key words: edentulous jaw, impression, deviation, functional area, best fit

余念, 曹阳, 俞青. 无牙颌两种印模方法的数字化模型偏差分析[J]. 口腔医学研究, 2022, 38(3): 252-255.

YU Nian, CAO Yang, YU Qing. Deviation Analysis of Digital Model of Edentulous Jaw with Two Impression Methods[J]. Journal of Oral Science Research, 2022, 38(3): 252-255.

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无牙颌两种印模方法的数字化模型偏差分析

Deviation Analysis of Digital Model of Edentulous Jaw with Two Impression Methods

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