The aim of this study was to develop a laser-sinterable and radiopaque glass powder as a potential sealer in endodontic therapy. The hypothesis was that it is possible to dope an SiO₂-Na₂O-CaO-P₂O₅–based glass with barium (Ba) and tantalum (Ta) in such a way that the prepared glass powder can be sintered using a dental Er:YAG laser, with different parameters at different intensities. A reference glass (G1), a barium-doped glass (G2), and a tantalum-doped glass (G3) were investigated. Their chemistry, particle size distribution, structure, radiopacity, and sintering behavior were investigated using X-ray fluorescence (XRF), laser granulometry, X-ray diffractometry (XRD), X-ray imaging, and laser scanning microscopy (LSM). Sintering behavior was statistically analyzed using the Kruskall–Wallis and post-hoc test (α = 0.05). XRF analysis revealed that all of the glasses produced were within the calculated chemistry. The laser granulometry results confirmed that all glass powders had a similar grain size distribution before sintering, and the XRD investigation showed that all glasses had a characteristic amorphous structure without noticeable devitrification. G3 exhibited the best radiopacity result in compliance with ISO 6876, with a mean value of 4.06 ± 0.10 mm aluminum equivalent. G3 also showed the best sintering behavior among all of the laser parameters tested, without any statistical differences from the reference glass G1 (P > 0.05). Particularly in view of its bonding behavior to dental hard tissues, further research on the use of G3 as an endodontic laser-sinterable sealing material can therefore be strongly recommended.

这项研究的目的是开发一种激光可烧结且不透射线的玻璃粉，作为牙髓治疗中潜在的封闭剂。假设是可以掺杂SiO ₂ -Na ₂ O-CaO-P ₂ O _5。钡（Ba）和钽（Ta）的基于玻璃的玻璃，可以使用牙科Er：YAG激光烧结制备的玻璃粉末，并在不同强度下使用不同的参数。研究了参考玻璃（G1），掺钡玻璃（G2）和掺钽玻璃（G3）。使用X射线荧光（XRF），激光粒度分析，X射线衍射（XRD），X射线成像和激光扫描显微镜（LSM）研究了它们的化学性质，粒度分布，结构，射线不透性和烧结行为。使用Kruskall–Wallis和事后检验对烧结行为进行统计分析（α= 0.05）。XRF分析表明，所生产的所有玻璃均在计算的化学范围内。激光粒度分析结果证实，所有玻璃粉在烧结前都具有相似的粒度分布，XRD研究表明，所有玻璃都具有特征性的非晶结构，并且没有明显的失透现象。G3表现出最佳的不透射线结果，符合ISO 6876，铝当量平均值为4.06±0.10 mm。在所有测试的激光参数中，G3还显示出最佳的烧结性能，与参考玻璃G1（P  > 0.05）。特别是考虑到其与牙齿硬组织的粘结性能，因此强烈建议进一步研究将G3用作牙髓可激光烧结的密封材料。