不同功率超声龈下工作尖对牙根表面结构的影响及工作效率:扫描电镜观察(英文)  

Effects and efficiency of various powers of ultrasonic subgingival work tip on dental root surface A scanning electron microscopic study

作　　者：于晓斐[1] 邓婧[1] 

机构地区：[1]青岛大学医学院附属医院口腔科,山东省青岛市266003

出　　处：《中国组织工程研究与临床康复》2009年第51期10185-10188,共4页Journal of Clinical Rehabilitative Tissue Engineering Research

摘　　要：背景:牙石及菌斑的过多残留及器械在牙根面留下的划痕都会造成根面粗糙,而这种粗糙的牙根面反过来又会加速菌斑、牙石的堆积,以完善的刮治术操作可解决这一问题,但目前部分临床医生对超声龈下刮治术的操作尚不规范。目的:观察不同功率超声龈下工作尖的不同工作端对牙根表面结构的影响及其工作效率。设计、时间及地点:对比观察实验,于2009-03/05在青岛大学医学院实验室完成。材料:选取10颗因牙周病拔除的离体牙的20个牙根面,各牙根面的牙石量基本相等。离体牙来自2个患者口内,患者均为男性,年龄40～50岁。方法:根据功率将20个牙根面分成大功率组及小功率组,每组又分为2个亚组。大功率组将超声工作仪功率设定为3档,小功率组设定为1档,两组分别使用H3工作尖的侧面及尖端对牙根面进行刮治。分别记录去净牙石的操作时间,并对刮治后的牙根面进行扫描电镜观察。主要观察指标:观察牙根表面结构的变化。结果:扫描电镜观察,大功率工作尖侧面组及小功率工作尖侧面组牙根表面划痕均较少,而大功率工作尖尖端组、小功率工作尖尖端组组牙根表面的划痕较多。大功率组牙根表面残留牙石和菌斑较少,但有牙骨质剥脱,小功率组残留牙石和菌斑较多。在操作时间方面,大功率组明显短于小功率组(P<0.01),大功率工作尖侧面组和尖端组,小功率工作尖侧面组和尖端组之间差异无显著性意义(P>0.05)。结论:超声工作尖的侧面能准确而有效地去净牙石和菌斑,且对牙根面损伤小;较大功率可快速去净牙石,但对根面的损伤较大。BACKGROUND：Excessive residue of dental calculus and dental plaque and scratch of instruments on dental root surface will cause rough root surface,which will accelerate accumulation of dental calculus and dental plaque.Improved scaling can solve this problem,but the operation of ultrasonic subgingival scaling is not regular by some clinical physicians.OBJECTIVE：To study the effect on the root surfaces and the work efficacy following ultrasonic subgingival scaling with different output power and different parts of work tip.DESIGN,TIME AND SETTING：The comparison observational study was performed at the Laboratory of Medical College of Qingdao University from March to May 2009.MATERIALS：Twenty root surfaces from ten teeth extracted for severe periodontal diseases were selected,and the volume of dental calculus was basically equal.Ex vivo teeth were obtained from two male patients aged 40-50 years.METHODS：Twenty root surfaces were randomly divided into group A or group B,the high power was set as ＂3＂ gear （group A）,and the low power was set as ＂1＂ gear （group B）,using the side （group A1 and B1） and the top （group A2 and B2） of work tip.The time for scaling was recorded and the surface feature of all the specimens was observed under scanning electron microscope （SEM）.MAIN OUTCOME MEASURES：Changes in root surface structure were observed.RESULTS：The damage of root surfaces in groups A1 and B1 was less severe,while more in groups A2 and B2.There were less calculus and plaque residual on root surfaces in group A than in group B.Cementum exfoliation was observed in group A but not in group B.The operating time of group A was significantly shorter than that of group B （P 0.01）.However,there was no significant difference between groups A1 and A2 or groups B1 and B2 （P 0.05）.CONCLUSION：Calculus and plaque can be cleaned more effectively and the damage is less severe by using the side of work tip.Although the calculus can be cleaned more rapidly by using higher power set,the d

关 键 词：龈下刮治术 超声 根面损伤 扫描电镜 

分 类 号：R318[医药卫生—生物医学工程]