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首页> 外文会议>Conference on Lasers in Dentistry Ⅶ Jan 21-22, 2001, San Jose, USA >Laser treatment of first degree carious lesions
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Laser treatment of first degree carious lesions

机译：激光治疗一级龋病

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The therapy of initial carious lesions aims in a minimal invasive removal of infected dental hard tissues. Typically standard preparation instruments bear the risk of removing a big amount of sound structures as a result of access. On the other hand the competence of Er:YAG lasers for caries removal has been repeatedly proven.Aim of this study was to compare cavity preparations at simulated clinical conditions performed by two different Er:YAG laser systems, one working in non-contact mode (KaVo Key Laser; Biberach, Germany) the other working in contact mode (Continuum Biomedical DELight Er:YAG Laser System, Santa Clara, CA).The sample material consisted of 15 randomized selected extracted human molars clinically presenting initial carious lesions located in the occlusal fissure area. In the first part of the study each lesion passed standard clinical examinations. Visual examination, probing, x-rays and Fluorescence measurements (DIAGNOdent 2095; KaVo, Biberach, Germany) were performed. A clinical diagnosis for each lesion was given. Finally, the percentage of correct caries diagnosis obtained from the different diagnostic aids was calculated. The fluorescence measurement tool showed an extremely high success rate in the diagnosis of depth of caries.In the second part of the study the sample material was split into two groups showing equivalent clinical extension of the assumed first degree caries in horizontal direction. Each group was randomized assigned to a single laser system and laser caries removal was performed until no residual caries was clinically detectable. Afterwards a blinded evaluation on the treated samples was performed. They were judged by the quality and completeness of caries removal, the quality and extension of the cavity outline, quality of cavity walls, bevels and surface of the cavity floor. Additionally macroscopical and histological evaluations were performed.The results support initial caries therapy with Er:YAG lasers. Differences between the use of a contact mode or a non contact Er:YAG laser delivery mode came to light. In case of tiny carious fissures the contact mode delivered Er:YAG laser seems to have advantages over the non contact mode laser. The overall rating for the quality of the cavity preparation is better using the contact mode delivered Er:YAG laser than engaging the non contact mode laser at the same parameter settings.
机译：初始龋齿病变的治疗旨在以微创方式去除感染的牙齿硬组织。通常，标准的准备乐器具有因接近而去除大量声音结构的风险。另一方面，Er：YAG激光去除龋齿的能力已得到反复证明。本研究的目的是比较由两种不同的Er：YAG激光系统在一个模拟的临床条件下进行的腔准备，其中一种以非接触模式工作（ KaVo Key Laser；位于德国比伯拉赫（Biberach，德国）；另一种以接触模式工作（Continuum Biomedical DELight Er：YAG Laser System，加利福尼亚州圣克拉拉）。样本材料由15个随机选择的人工磨牙组成，临床表现出位于咬合区内的初期龋齿病变。裂隙区域。在研究的第一部分，每个病变均通过了标准的临床检查。进行了目测，探测，X射线和荧光测量（DIAGNOdent 2095； KaVo，Biberach，德国）。给出了每个病变的临床诊断。最后，计算了从不同诊断辅助工具获得的正确龋齿诊断的百分比。荧光测量工具在龋齿深度的诊断中显示出极高的成功率。在研究的第二部分中，将样品材料分为两组，显示了假定的一级龋在水平方向上的等效临床扩展。将每组随机分配至单个激光系统，并进行激光龋齿清除，直到临床上无法检测到残留的龋齿为止。之后，对处理后的样品进行盲法评估。他们通过龋齿清除的质量和完整性，腔轮廓的质量和延伸，腔壁，斜面和腔底表面的质量来判断。另外还进行了宏观和组织学评估。结果支持使用Er：YAG激光进行龋齿治疗。接触模式或非接触式Er：YAG激光传输模式之间的区别逐渐显现出来。如果出现微小的龋齿，Er：YAG激光发射的接触模式似乎比非接触模式的激光具有优势。使用接触模式提供的Er：YAG激光比使用非接触模式激光在相同的参数设置下，腔制备质量的总体评价要好。

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