Sazak H, Türkmen C, Günday M
Marmara Universitesi, Dishekimligi Fakültesi, Nisantasi-Istanbul/Türkiye.
Oper Dent. 2001 Sep-Oct;26(5):476-81.
The effects of the Nd:YAG laser, air-abrasion and acid-etching systems on mineral content and surface morphology of cut dentin and enamel were examined in 10 extracted human teeth. Enamel specimens were lased for two seconds at a fluence of 0.75 J and a frequency of 15 Hz, air-abraded for two seconds with 50 micron Al-oxide and etched for 60 seconds with 37% ortho-phosphoric acid. Dentinal specimens were subjected to the same procedure for half the time. Untreated areas of the same specimens served as the control. Morphologically, the lased dentin showed an apparently melted surface with partial obstruction of the dentin tubules, as well as cracks along the lased surface. Air-abrasion created very irregular surfaces on enamel and dentin. Dentin tubules were observed on the acid-etched dentin samples but not the air-abraded surfaces. The Nd:YAG laser created the most surface irregularity on both enamel and dentin. Laser treatment appeared to alter the chemical structure and surface morphology of the dentin and enamel.
在10颗拔除的人类牙齿上，研究了钕钇铝石榴石（Nd:YAG）激光、空气喷砂和酸蚀系统对切割牙本质和牙釉质矿物质含量及表面形态的影响。牙釉质标本以0.75 J的能量密度和15 Hz的频率照射2秒，用50微米的氧化铝进行2秒的空气喷砂处理，并用37%的正磷酸蚀刻60秒。牙本质标本进行相同的操作，但时间减半。同一样本的未处理区域作为对照。形态学上，激光照射后的牙本质表面明显熔化，牙本质小管部分堵塞，激光照射表面出现裂纹。空气喷砂在牙釉质和牙本质上产生了非常不规则 的表面。在酸蚀后的牙本质样本上观察到了牙本质小管，但在空气喷砂处理的表面未观察到。Nd:YAG激光在牙釉质和牙本质上造成的表面不规则性最大。激光处理似乎改变了牙本质和牙釉质的化学结构和表面形态。
