摘要
目的对传统高速牙钻法、Er,Cr:YSGG激光法去腐后牙本质表面玷污层情况,牙本质小管栓塞率及去腐时间进行评估。方法收集新近拔除伴中度龋坏、龋洞大小相近的20颗根面龋患牙,随机分为2组,每组10颗牙,分别采用传统高速牙钻法和Er,Cr:YSGG激光法去腐。去龋过程中计时,去龋后肉眼观察窝洞洞底表面,并用扫描电镜对牙本质表面玷污层进行观察。结果传统高速牙钻组去腐所需时间为(6.81±1.23)min,Er,Cr:YSGG激光组为(7.11±0.89)min,2组去腐时间比较差异无统计学意义(P>0.05);扫描电镜下观察,传统高速牙钻组牙本质小管清晰度较差,玷污层大量分布,牙本质栓塞率为91.1%。Er,Cr:YSGG激光组牙本质小管清晰可见,有极少量玷污层存在,牙本质小管栓塞率为13.3%,2种疗法栓塞率比较,差异有统计学意义(P<0.05),Er,Cr:YSGG激光组栓塞率低,治疗较为有效。结论 Er,Cr:YSGG激光去腐法更能高效去龋,清除牙本质玷污层。
Objective To observe the morphological changes in dental tissues of root caries and dentin embolism rate by scanning electron microscope（SEM） after using two different methods for caries removal. Methods Twenty ex- tracted elderly people teeth with similar size of moderate carious lesions were enrolled in the study. They were divided into two groups： high speed drill group and Er, Cr：YSGG laser group. After treatment, the teeth samples were investigated by SEM at different magnification, the morphological changes in the tissues and the working time were registered and com- pared. Results The time of traditional high-speed drill group was of no significant difference compared with Er, Cr： YS- GG laser group （P〉0. 05）.By using SEM, the surface of smear layer was thicker and only a little dentinal tubules orifices were open by high-speed drill, the dentin embolization rate was 91.1%. The teeth surfaces prepared with Er, Cr： YSGG la- ser remained little smear layer and dentinal tubules orifices were clearly exposed. The surfaces were highly retentive and dentin tubule embolism rate was 13.3%. The difference between two groups was statistically significant（P〈0. 05）. Con- clusions The teeth surfaces prepared with Er, Cr： YSGG laser remained little smear layer and dentinal tubules orifices could be clearly exposed. The surfaces are highly retentive. Er, Cr： YSGG laser is an effective treatment.
出处
《实用老年医学》
CAS
2014年第4期299-301,共3页
Practical Geriatrics
基金
新疆医科大学2012年支撑学科建设项目资助(XYDXK50780323)
关键词
ER
CR
YSGG激光
玷污层
扫描电镜
Er, Cr： YSGG laser
tainted layer
scanning electron microscopy
