基于口腔计算机断层扫描图像与激光扫描图像融合的牙齿三维模型重构

发布时间：2018-02-13 13:25

本文关键词： 口腔正畸三维牙齿模型配准融合重构　出处：《生物医学工程学杂志》2017年01期 　论文类型：期刊论文

【摘要】：完整牙齿三维模型为正畸医师进行错颌畸形诊断、治疗方案规划提供了必要的辅助信息。目前,牙齿三维模型主要通过口腔计算机断层扫描(CT)图像分割与重构得到。然而,利用CT图像重构的模型精度较低,不适用于无托槽隐形矫治器的辅助设计;另一方面,在正畸治疗的不同周期对患者进行重复口腔CT扫描会给患者带来辐射伤害。为此,本文提出基于口腔CT图像与激光扫描图像融合重构牙齿三维模型的方法。该方法利用口腔CT图像重构的牙根与激光扫描图像重构的牙冠经配准融合后建立完整的牙齿三维模型,所建立的模型牙冠部位精度更高。同时,该方法只需在正畸治疗前对患者进行一次口腔CT扫描,在治疗过程中进行激光扫描即可得到患者各治疗周期完整的牙列模型,从而通过减少CT扫描次数降低给患者带来的辐射伤害。
[Abstract]:The complete 3D model of teeth provides necessary information for orthodontists to diagnose malocclusion and plan treatment plans. At present, the 3D model of teeth is mainly obtained by CT image segmentation and reconstruction. However, The model reconstructed by CT image is not suitable for the aid design of the invisible orthodontic appliance without brackets. On the other hand, repeated oral CT scanning in different cycles of orthodontic treatment can cause radiation injury to the patient. In this paper, a method of reconstruction of tooth model based on the fusion of dental CT image and laser scanning image is presented, which uses the root of dental CT image reconstruction and the crown reconstructed by laser scanning image to establish a complete three-dimensional model of tooth after registration and fusion. At the same time, the method only need to do one oral CT scan before orthodontic treatment, and the complete dentition model can be obtained by laser scanning during the course of treatment. By reducing the number of CT scans to reduce the radiation injury to patients.
【作者单位】：中国科学院深圳先进技术研究院;中国科学院深圳先进技术研究院人机智能协同系统重点实验室;
【基金】：国家自然科学基金(61601452,61403368) 广东省杰出青年科学基金(2015A030306020) “广东特支计划”科技青年拔尖人才项目(2015TQ01X306) 中国科学院青年创新促进会项目(2015301) 中国博士后科学基金(2016M600693) 深圳市孔雀计划技术创新项目(KQJSCX20160301144248) 深圳市科技计划项目(GJHS20160331185913023)
【分类号】：R816.98;R783.5

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