Oral and Craniomaxillofacial Surgery, Eppendorf University Hospital, University of Hamburg, Martinistr. 52, 20246, Hamburg, Germany.
Section Mass Spectrometry and Proteomics, Center for Diagnostics, University Medical Center Hamburg-Eppendorf (UKE), Martinistr. 52, 20246, Hamburg, Germany.
Lasers Med Sci. 2024 Aug 29;39(1):227. doi: 10.1007/s10103-024-04173-1.
A nanosecond infrared laser (NIRL) was investigated in cutting dental roots. The focus of the investigation was defining the preparation accuracy and registration of thermal effects during laser application. Ten teeth were processed in the root area using a NIRL in several horizontal, parallel incisions to achieve tooth root ablation as in an apicoectomy. Temperature change was monitored during ablation and the quality of the cutting edges in the roots were studied by means of micro-CT, optical coherence tomography, and histology of decalcified and undecalcified specimens. NIRL produced clearly defined cut surfaces in dental hard tissues. The automated guidance of the laser beam created regular, narrow dentin defects that tapered in a V-shape towards the ablation plane. A biologically significant increase in the temperature of the object and its surroundings did not occur during the laser application. Thermal dentin damage was not detected in histological preparations of treated teeth. Defined areas of the tooth root may be ablated using a NIRL. For clinical translation of NIRL in apicoectomy, it would be necessary to increase energy delivered to hard tissue and develop beam application facilitating beam steering for oral treatment.
一种纳秒红外激光（NIRL）被用于切割牙根部。研究的重点是定义激光应用过程中准备精度和热效应的定位。使用 NIRL 在几个水平的平行切口中对 10 颗牙齿进行了根部处理，以实现类似于根尖切除术的牙齿根部消融。在消融过程中监测温度变化，并通过微 CT、光学相干断层扫描和脱钙和未脱钙标本的组织学研究来研究根部切割边缘的质量。NIRL 在牙科硬组织中产生了清晰定义的切割表面。激光束的自动引导创建了规则的、狭窄的牙本质缺陷，这些缺陷在向消融平面逐渐变细呈 V 形。在激光应用过程中，物体及其周围环境的温度没有出现显著的生物性升高。在处理过的牙齿的组织学准备中没有检测到热牙本质损伤。使用 NIRL 可以消融牙齿的特定区域。为了将 NIRL 应用于根尖切除术的临床转化，有必要增加对硬组织的能量传递，并开发便于口腔治疗的光束引导应用的光束应用。
