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-  2017 

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

DOI: doi:10.7507/1001-5515.201604014

Keywords: 口腔正畸, 三维牙齿模型, 配准, 融合, 重构

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Abstract:

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

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