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Image guided laser ablation of demineralization from root surfaces

机译：图像引导的激光烧蚀根部表面的脱矿质

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摘要

It is challenging to identify demineralized areas of root lesions due to cervical erosion, calculus formation, andheavy staining of dentin. We have found that root caries can be imaged with extremely high contrast at shortwavelength IR (SWIR) wavelengths beyond 1500-nm. Lasers are well suited for the selective removal of carieslesions from tooth surfaces. A CO_2 laser operating at a wavelength of 9.3-μm was combined with a thuliumdopedfiber laser operating at 1880-nm for the selective removal of root caries lesions from extracted teeth.Serial SWIR reflectance images at 1880-nm were used to guide the CO_2 laser for image-guided laser ablation.Cross polarization optical coherence tomography (CP-OCT) was used to assess the initial depth of the lesionsbefore removal and assess the volume of sound and demineralized tissue removed by the CO_2 laser. With thisimage-guided approach, we believe we can achieve highly selective lesion removal and minimal damage tosurrounding sound tissues.
机译：由于宫颈糜烂，牙结石形成和牙本质染色较重，很难确定根部病变的脱矿质区域。我们发现，可以在超过1500 nm的短波长红外（SWIR）波长下以极高的对比度对根龋进行成像。激光非常适合从牙齿表面选择性去除龋齿。将波长为9.3μm的CO_2激光器与掺1的\ r \ n光纤激光器在1880nm处工作，以选择性地去除拔牙后的龋齿病变。\ r \ n在1880nm处的串行SWIR反射图像是\ r \ n使用交叉偏振光学相干断层扫描（CP-OCT）评估病变的初始深度\ r \ n在去除病变之前并评估声音和脱矿质组织的体积被CO_2激光去除。通过这种\ r \ n图像引导的方法，我们相信我们可以实现高度选择性的病变清除，并且对声组织的破坏最小。

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  • 来源
    《Lasers in Dentistry XXV》|2019年|108570N.1-108570N.5|共5页
  • 会议地点 1605-7422;2410-9045
  • 作者

    Navitinder Dhillon; Kenneth H. Chan; Vincent B. Yang; Daniel Fried;

  • 作者单位

    University of California, San Francisco, San Francisco, CA 94143-0758;

    University of California, San Francisco, San Francisco, CA 94143-0758;

    University of California, San Francisco, San Francisco, CA 94143-0758;

    University of California, San Francisco, San Francisco, CA 94143-0758;

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