Tseng Y C, Lin F H, Lin C P, Lan W H, Liao J D
Institute of Biomedical Engineering, College of Medicine, National Taiwan University, Taipei, Taiwan.
Biomed Sci Instrum. 1999;35:285-90.
Fractured teeth are difficult to treat effectively. Currently, such as root fractures are usually treated by full-coverage restoration, root amputation, or tooth extraction. If the fusion of tooth fracture by laser were possible, it could offer a different therapy to repair fracture teeth. We tried to use a developed DP-bioactive glass paste to fuse or bridge the tooth crack line by a medium energy continuous-wave CO2 laser. The present report was focused on the phase transformation and rescrystallization of DP-bioactive paste during expose to the CO2 laser. The materials will examine by means of XRD, FTIR, DTA/TGA, and SEM. From the study, we could expect that the temperature increase due to laser irradiation must be over than 900 degrees C and the DP-bioactive glass paste could be melted in a short period of time after irradiation. In the study, we successfully developed a DP-bioactive glass paste which could form a melting glass within minutes after exposed to a medium energy density continuous-wave CO2 laser. The paste will be used to bridge the enamel or dentine surface crack by the continuous-wave CO2 laser in the near future.
折断的牙齿难以得到有效治疗。目前，诸如牙根折断通常通过全冠修复、牙根切除术或拔牙来治疗。如果能用激光实现牙齿折断处的融合，那么就能为修复折断牙齿提供一种不同的治疗方法。我们尝试使用一种研制出的DP生物活性玻璃糊剂，通过中能量连续波二氧化碳激光来融合或桥接牙齿裂纹线。本报告聚焦于DP生物活性糊剂在暴露于二氧化碳激光过程中的相变和再结晶。这些材料将通过X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、差示热分析/热重分析（DTA/TGA）和扫描电子显微镜（SEM）进行检测。从该研究中，我们可以预期激光照射导致的温度升高必须超过900摄氏度，并且DP生物活性玻璃糊剂在照射后能在短时间内熔化。在该研究中，我们成功研制出一种DP生物活性玻璃糊剂，其在暴露于中能量密度连续波二氧化碳激光后几分钟内就能形成熔融玻璃。这种糊剂在不久的将来将用于通过连续波二氧化碳激光桥接牙釉质或牙本质表面的裂纹。
