3D打印间接粘接托槽精度
发布时间：2019-06-06 20:27
【摘要】：目的:基于数字化正畸诊断设计流程进行间接粘接转移托盘模型的设计和3D打印,对关键性的托槽打印精度进行检验,以期对数字化正畸的临床应用有所帮助。方法:从2014年至2015年于北京大学口腔医院正畸科就诊的错牙合畸形患者中选取14例为研究对象,其中拔牙8例,不拔牙6例。所有患者牙周洁治后进行口内牙列扫描和锥形束CT(cone-beam computed tomography,CBCT)拍摄,所得STL数据与DICOM数据在自编软件中进行数据分割融合和配准、数字化矫治设计和计算机软件自动排牙、托槽虚拟定位、错牙合模型坐标还原,最终输出3D打印模型数据用于间接粘接转移定位托盘的制作。3D打印输出模型,经过后处理由水枪及超声震荡去除周围支撑材料,使用数字游标卡尺对所有样本牙颌模型上的左侧上下颌托槽及颊面管进行长度和宽度的测量,检验测量结果。测量值比较采用独立样本t检验,与托槽及颊面管设计尺寸进行比较。结果:在19个测量分析项目中有13个项目的测量均值与检验标准值间的差异有统计学意义,差异范围在0.04~0.17 mm,且除左下第二前磨牙的托槽长度外均大于检验值。结论:虽然托槽的宽度和颊面管的长度和宽度上大多稍大于检验值,但这不一定对临床上间接粘接转移托盘的制作造成影响,0.04~0.17 mm的差异是否会影响托槽实际的固位和定位有待进一步的研究证实。
[Abstract]:Objective: based on the digital orthodontic diagnosis design flow, the indirect bonding transfer tray model design and 3D printing are carried out, and the key bracket printing accuracy is tested in order to be helpful to the clinical application of digital orthodontic. Methods: from 2014 to 2015, 14 patients with malocclusion were selected from the Orthodontic Department of Peking University Stomatological Hospital, including 8 cases of tooth extraction and 6 cases of non-extraction. After periodontal cleaning, intraoral dentition scanning and conical beam CT (cone-beam computed tomography,CBCT) were performed. The obtained STL data and DICOM data were segmented, fusion and registered in the self-designed software. Digital correction design and computer software automatic tooth arrangement, bracket virtual positioning, malocclusion model coordinate reduction, and finally output 3D printing model data for indirect bonding transfer positioning tray making. 3D print output model, After post-treatment, the surrounding supporting materials were removed by water gun and ultrasonic concussion. the length and width of the left maxillary bracket and buccal tube on all the sample maxillary models were measured by digital Vernier caliper, and the measured results were tested. The measured values were compared with the design dimensions of bracket and buccal tube by independent sample t test. Results: there was significant difference between the measured mean value and the test standard value in 13 of the 19 items of measurement and analysis, the difference range was 0.04 鈮，
本文编号：2494575
[Abstract]:Objective: based on the digital orthodontic diagnosis design flow, the indirect bonding transfer tray model design and 3D printing are carried out, and the key bracket printing accuracy is tested in order to be helpful to the clinical application of digital orthodontic. Methods: from 2014 to 2015, 14 patients with malocclusion were selected from the Orthodontic Department of Peking University Stomatological Hospital, including 8 cases of tooth extraction and 6 cases of non-extraction. After periodontal cleaning, intraoral dentition scanning and conical beam CT (cone-beam computed tomography,CBCT) were performed. The obtained STL data and DICOM data were segmented, fusion and registered in the self-designed software. Digital correction design and computer software automatic tooth arrangement, bracket virtual positioning, malocclusion model coordinate reduction, and finally output 3D printing model data for indirect bonding transfer positioning tray making. 3D print output model, After post-treatment, the surrounding supporting materials were removed by water gun and ultrasonic concussion. the length and width of the left maxillary bracket and buccal tube on all the sample maxillary models were measured by digital Vernier caliper, and the measured results were tested. The measured values were compared with the design dimensions of bracket and buccal tube by independent sample t test. Results: there was significant difference between the measured mean value and the test standard value in 13 of the 19 items of measurement and analysis, the difference range was 0.04 鈮，
本文编号：2494575
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