【摘要】：目的:基于數(shù)字化正畸診斷設(shè)計(jì)流程進(jìn)行間接粘接轉(zhuǎn)移托盤模型的設(shè)計(jì)和3D打印,對(duì)關(guān)鍵性的托槽打印精度進(jìn)行檢驗(yàn),以期對(duì)數(shù)字化正畸的臨床應(yīng)用有所幫助。方法:從2014年至2015年于北京大學(xué)口腔醫(yī)院正畸科就診的錯(cuò)牙合畸形患者中選取14例為研究對(duì)象,其中拔牙8例,不拔牙6例。所有患者牙周潔治后進(jìn)行口內(nèi)牙列掃描和錐形束CT(cone-beam computed tomography,CBCT)拍攝,所得STL數(shù)據(jù)與DICOM數(shù)據(jù)在自編軟件中進(jìn)行數(shù)據(jù)分割融合和配準(zhǔn)、數(shù)字化矯治設(shè)計(jì)和計(jì)算機(jī)軟件自動(dòng)排牙、托槽虛擬定位、錯(cuò)牙合模型坐標(biāo)還原,最終輸出3D打印模型數(shù)據(jù)用于間接粘接轉(zhuǎn)移定位托盤的制作。3D打印輸出模型,經(jīng)過后處理由水槍及超聲震蕩去除周圍支撐材料,使用數(shù)字游標(biāo)卡尺對(duì)所有樣本牙頜模型上的左側(cè)上下頜托槽及頰面管進(jìn)行長度和寬度的測量,檢驗(yàn)測量結(jié)果。測量值比較采用獨(dú)立樣本t檢驗(yàn),與托槽及頰面管設(shè)計(jì)尺寸進(jìn)行比較。結(jié)果:在19個(gè)測量分析項(xiàng)目中有13個(gè)項(xiàng)目的測量均值與檢驗(yàn)標(biāo)準(zhǔn)值間的差異有統(tǒng)計(jì)學(xué)意義,差異范圍在0.04~0.17 mm,且除左下第二前磨牙的托槽長度外均大于檢驗(yàn)值。結(jié)論:雖然托槽的寬度和頰面管的長度和寬度上大多稍大于檢驗(yàn)值,但這不一定對(duì)臨床上間接粘接轉(zhuǎn)移托盤的制作造成影響,0.04~0.17 mm的差異是否會(huì)影響托槽實(shí)際的固位和定位有待進(jìn)一步的研究證實(shí)。
[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，

本文編號(hào)：2494575