Energy Output Reduction and Surface Alteration of Quartz and Sapphire Tips Following Er:YAG Laser Contact Irradiation for Tooth Enamel Ablation

被引：7

作者：

Eguro, Toru ^{[1
]}

Aoki, Akira ^{[2
]}

Maeda, Toru ^{[3
]}

Takasaki, Aristeo Atsushi ^{[2
]}

Hasegawa, Mitsuru ^{[3
]}

Ogawa, Masaaki ^{[4
]}

Suzuki, Takanori

Yonemoto, Kazuaki

Ishikawa, Isao ^{[5
]}

Izumi, Yuichi ^{[2
,6
]}

Katsuumi, Ichiroh

机构：

[1] Tokyo Nippon Dent Univ, Dept Endodont & Operat Dent, Sch Life Dent Tokyo, Chiyoda Ku, Tokyo 1028159, Japan

[2] Tokyo Med & Dent Univ, Grad Sch, Dept Hard Tissue Engn, Sect Periodontol, Tokyo, Japan

[3] Nippon Dent Univ Tokyo, Dent Hosp, Div Gen Dent, Tokyo, Japan

[4] Nippon Dent Univ Tokyo, Res Ctr Odontol, Tokyo, Japan

[5] Tokyo Womens Med Univ, Inst Adv Biomed Engn & Sci, Tokyo, Japan

[6] Tokyo Med & Dent Univ, Global Ctr Excellence Program, Int Res Ctr Mol Sci Tooth & Bone Dis, Tokyo, Japan

来源：

LASERS IN SURGERY AND MEDICINE | 2009年 / 41卷 / 08期

关键词：

contact tip; EPMA analysis; Er:YAG laser; output energy; quartz; sapphire; ER-YAG LASER; DENTAL HARD SUBSTANCES; COMPOSITE RESINS; CARIES TREATMENT; STRENGTH; THERAPY; TEMPERATURE; ADHESION; PROBE;

D O I：

10.1002/lsm.20806

中图分类号：

R75 [皮肤病学与性病学];

学科分类号：

100206 ;

摘要：

Background: Despite the recent increase in application of Er:YAG laser for various dental treatments, limited information is available regarding the contact tips. This study examined the changes in energy output and surface condition of quartz and sapphire contact tips after Er:YAG laser contact irradiation for tooth enamel ablation. Materials and Methods: Ten sets of unused quartz or sapphire contact tips were employed for contact irradiation to sound enamel of extracted teeth. The teeth were irradiated with Er:YAG laser at approximately 75 J/cm(2)/pulse and 20 Hz under water spray for 60 minutes. The energy output was measured before and every 5 minutes after irradiation, and the changes in morphology and chemical composition of the contact surface were analyzed. Results: The energy output significantly decreased with time in both tips. The energy output from the sapphire tips was generally higher on average than that of the quartz. The contact surfaces of all the used quartz tips were concave and irregular. Most of the sapphire tips also appeared rough with crater formation and fractures, except for a few tips in which a high energy output and the original smooth surface were maintained. Spots of melted tooth substances were seen attached to the surface of both tips. Conclusion: In contact enamel ablation, the sapphire tip appeared to be more resistant than the quartz tip. The quartz tips showed similar patterns of energy reduction and surface alteration, whereas the sapphire tips revealed a wider and more characteristic variation among tips. Lasers Surg. Med. 41:595-604, 2009. (C) 2009 Wiley-Liss, Inc.

引用

页码：595 / 604

页数：10