In vitro evaluation of Er:YAG laser scaling of subgingival calculus in comparison with ultrasonic scaling
In vitro evaluation of Er:YAG laser scaling of subgingival calculus in comparison with ultrasonic scaling
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DOI：
10.1034/j.1600-0765.2000.035005266.x
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发表时间：
2000-10-01
影响因子：
3.5
通讯作者：
Ishikawa, I
中科院分区：
文献类型：
--
作者：
Aoki, A;Miura, M;Ishikawa, I
本研究的目的是评价Er：YAG激光洁治的效果以及激光洁治后根面的形态和组织学变化，并与常规超声洁治的效果和根面的变化进行比较。使用53颗牙周受累的人拔除的牙齿，其中有一条龈下结石带。随机分为激光洁治组和超声洁治组。在喷水条件下进行激光照射，能量输出40mJ/脉冲，脉冲10脉冲/S，探头嘴唇倾斜接触根面。超声洁治器在临床标准功率设置下进行。使用两种处理方法确定结垢所需的时间、结垢面积和温度变化。用组织学和扫描电子显微镜(S.E.M.)观察了鳞片表面的特征。观察。Er：YAG激光可在与超声洁牙器相当的水平上去除龈下结石，而不会产生较大的热升。从大体上看，激光处理的牙根表面比超声刻度的牙根表面粗糙或相似。但激光除垢的效率低于超声除垢。此外，组织学检查显示，激光牙根表面有一层薄薄的深染色带。和S.E.M.分析表明，激光表面具有特征的微观粗糙度。激光刮石提供了与超声刮石相似的结石去除水平。然而，Er：YAG激光产生的表面很浅。牙根质牙骨质的结构和热显微变化。
The purpose of the present study was to evaluate the effectiveness of Er:YAG laser scaling and the morphological and histological changes of the laser-scaled root surface in comparison with the effectiveness and root surface changes produced by conventional ultrasonic scaling. Fifty-three periodontally involved human extracted teeth with a band of subgingival calculus were used. The teeth were divided randomly into 2 groups for laser scaling and ultrasonic scaling. Laser irradiation was performed at an energy output of 40 mJ/pulse and 10 pulses/s under water spray, with the probe lip contacted obliquely to the root surface. Ultrasonic scaling was performed at a clinically standard power setting. The time required for scaling, the scaled area and the temperature changes were determined using both methods of treatment. The features of the scaled surfaces were examined by histological and scanning electron microscope (s.e.m.) observations. The Er:YAG laser provided subgingival calculus removal on a level equivalent to that provided by the ultrasonic scaler, without major thermal elevation. Macroscopically, the laser-treated root surface was somewhat rougher than or similar to the ultrasonically scaled root. However, the efficiency of the laser scaling was lower than that of the ultrasonic scaling. In addition, histological examination revealed a thin deeply stained zone on the lased root surface. and s.e.m. analysis revealed a characteristic microroughness on the lased surface. The laser scaling provided a level of calculus removal that was similar to that provided by the ultrasonic scaling. However, the Er:YAG laser produced superficial. structural and thermal microchanges on the root cementum.