一种基于曲率连续算法的冠、根三维数据融合方法

发布时间：2018-02-01 20:13

本文关键词： 牙冠牙根三维图像融合锥形束CT 牙颌模型　出处：《北京大学学报(医学版)》2017年04期 　论文类型：期刊论文

【摘要】：目的:探索一种光学扫描牙冠三维模型和锥形束CT(cone beam CT,CBCT)重建牙根三维模型的数据融合方法,实现不同来源冠、根模型的自然过渡融合。方法:选取临床口腔正畸下颌牙列轻度拥挤患者1例,应用Mimics 17.0软件对患者CBCT数据重建带有牙根的牙列三维模型,并在Geomagic Stuido 2012软件中与患者高精度解剖形态的光学扫描牙列模型进行模型配准。对配准后的三维模型进行精确冠、龈边界线提取,边界线根向偏置及投影,冠、根边界线生成及模型剪裁等操作,并通过曲率连续算法实现不同来源冠、根模型的自然过渡缝合,完成冠、根三维融合模型的构建。结果:本研究基于商业化的软件平台,初步实现了针对光学扫描三维牙冠数据与CBCT三维牙根数据的曲率移形过渡融合方法,应用该方法完成了正畸临床10例牙列轻度拥挤患者冠、根三维融合模型的构建,融合模型由高年资医师主观打分评价,平均满意度8.6分(0~10分),初步验证了该方法的可行性和有效性。结论:本研究的冠、根三维数据融合方法可获得逼近真实生理解剖形态的完整牙齿及牙列三维模型,其对复杂牙列拥挤及错颌畸形患者的适应性有待进一步研究。
[Abstract]:Objective: to explore a data fusion method for the reconstruction of tooth root by optical scanning and conical beam CT(cone beam CT. Methods: one patient with mild crowding of mandibular dentition during orthodontic treatment was selected. The three-dimensional model of dentition with root was reconstructed by Mimics 17.0 software on CBCT data of patients. And in Geomagic Stuido 2012 software, the model was registered with the optical scanning dentition model of the patient with high precision anatomical morphology, and the accurate crown of the three dimensional model after registration was carried out. Gingival boundary line extraction, edge root bias and projection, crown, root boundary generation and model cutting operations, and through continuous curvature algorithm to achieve different source crown, root model of natural transition suture, complete crown. Results: based on the commercial software platform, we have preliminarily realized the curvature transition fusion method for optical scanning 3D crown data and CBCT 3D root data. This method was used to construct a three-dimensional fusion model of crown and root in 10 patients with mild dentition crowding. The fusion model was evaluated by the subjective score of the senior physician, and the average satisfaction was 8.6 ~ 10). The feasibility and effectiveness of this method were preliminarily verified. Conclusion: the crown and root 3D data fusion method in this study can obtain the complete tooth and dentition 3D model which approximates the true physiological anatomical shape. Its adaptability to complex dentition and malocclusion needs further study.
【作者单位】：北京大学口腔医学院·口腔医院口腔医学数字化研究中心口腔修复教研室口腔数字化医疗技术和材料国家工程实验室卫生部口腔医学计算机应用工程技术研究中心口腔数字医学北京市重点实验室;
【基金】：国家高技术研究发展计划(863计划,2013AA040801) 国家自然科学基金(81300921)资助~~
【分类号】：R783.5
【正文快照】： 随着口腔医学数字化技术的发展,数字印模技术和医学影像技术被越来越广泛地应用于口腔疾病的诊断与分析,其中以锥形束CT(cone beam CT,CBCT)技术、牙颌模型扫描技术、口内扫描技术应用报道较多。CT/CBCT类医学影像断层扫描技术可以获取患者口颌面部软、硬组织的三维体数据,是

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