Moritz A, Schoop U, Goharkhay K, Sperr W
Department of Conservative Dentistry, School of Dentistry, University of Vienna, Austria.
Lasers Surg Med. 1998;22(5):288-93. doi: 10.1002/(sici)1096-9101(1998)22:5<288::aid-lsm5>3.0.co;2-l.
A previous study [Moritz et al., Z Stomatol 1996; 93:451-454] had shown that favourable results in direct pulp capping could be achieved using a continuous wave CO2 laser in addition to the conventional calcium hydroxide dressing technique. In this study, these results are compared to those achieved using a CO2 laser working in superpulsed mode.
STUDY DESIGN/MATERIALS AND METHODS: A total of 260 direct pulp capping procedures were carried out; 130 were performed with a superpulsed CO2 laser, followed by a calcium hydroxide dressing, and 130 conventionally by applying only a calcium hydroxide preparation. Recall examinations were performed after 1 week and monthly for 18 months after treatment. A final examination was carried out 2 years after treatment. Thermal tests were used for vitality assessments and laser Doppler flowmetry for direct measurement of pulpal blood flow.
In the group of pulps treated with the superpulsed CO2 laser, the last recall examination at 2 years revealed that 93% of the teeth had remained vital. In the control group, the success rate was considerably lower (66.6%). Exposure site sizes and average patient age were nearly identical in both groups.
The CO2 laser seems to be a valuable aid in direct pulp capping; the efficiency of laser treatment can be increased by using a pulsed CO2 laser.
先前的一项研究[莫里茨等人，《口腔医学杂志》1996年；93:451 - 454]表明，除了传统的氢氧化钙敷料技术外，使用连续波二氧化碳激光进行直接盖髓术可取得良好效果。在本研究中，将这些结果与使用超脉冲模式工作的二氧化碳激光所取得的结果进行比较。
研究设计/材料与方法：共进行了260次直接盖髓术；130次使用超脉冲二氧化碳激光进行，随后进行氢氧化钙敷料，另外130次采用传统方法，仅应用氢氧化钙制剂。治疗后1周进行复查，之后每月复查1次，共复查18个月。治疗2年后进行最终检查。使用热测试评估牙髓活力，使用激光多普勒血流仪直接测量牙髓血流。
在接受超脉冲二氧化碳激光治疗的牙髓组中，2年时的最后一次复查显示，93%的牙齿仍保持活力。在对照组中，成功率显著较低（66.6%）。两组的暴露部位大小和患者平均年龄几乎相同。
二氧化碳激光似乎是直接盖髓术的一种有价值的辅助手段；使用脉冲二氧化碳激光可提高激光治疗的效率。
