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KANAL TEDAVİLERİNDE UYGULANABİLEN ÜÇ FARKLI LASER SİSTEMLERİNİN İN VİTRO OLARAK KARŞILAŞTIRILMALI ARAŞTIRILMASI

COMPARISONS OF THE EFFECT OF 3 DIFFERENT LASERS OF ROOT CANAL PREPARATION

Journal Name:

  • İstanbul Üniversitesi Diş Hekimliği Fakültesi Dergisi

Publication Year:

  • 1991

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
The effect of lasers on tooth structure have been studied by different authors. Nd: YAG and C02 Lasers are already well established in destistry and oral surgery, the Excimer-Laser entered only the medical field. The effect 0/rod: YAG and COZLasers on tissue is described as vaporisation, but the effect of Excimer Laser based on photoabtation. The Excimer-Laser is a gas laser and the laserlight is guidable through an optical quart fiber and has a sufficient transmission through water. In this in vitro investigation the temperature rises during laser irradiation in root canals were measured. It was observed high temperature rises by the radiation with infrared lasers (Nd: YAG and C02 Laser). Radiation from an Ex cimer-Laser caused only slight temperature differences. The averages of the temperature increases are: Nd: YAGXa ser, 11,66"C, C02 Loser 5,68 °C andExcimerLaser 0,3°C. According to the Mann - Whitney - U• Test the differences are significant (p<O.OS). The scanning electron microscopic study demonstrated that it was possible to prepare root canals with Excimer Laser. Only by the speciments of Excimer Laser group were the root canal walls free of smear layer or any other soiling. The dentin tubuli were open and free of clogging.
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Abstract (Original Language): 
Laserin diş dokulanna etkisi birçok araştırmacılar tarafından İncelenmiştir. Nd: YAG ve CO2 laserleri dental piyasada satışa çıkarılmış, Excimer-Laser ise henüz sadece tıp dallarında rutin olarak kullanılmaktadır. Bu üç farklı laser tipinin diş dokulanndaki etkileri farklıdır. Nd: YAG ve CO^laserleri dokuyu buharlaştırarak yok edebilirler. Excimer-Laser dokuda fotablasyon etkisiyle madde kaybına yol açar ki, bu olay diğerlerinin tersine termik bir reaksiyon değildir. Excimer-Laser bi r gaz laseri olup ışınlan kuvars fiberler (lifler) ile yönlendirilebilir. Işınlar sulu ortamda absor-be edilebildiğinden, bu tip laserle sulu ortamda çalışılabilir. Bu çalışmada Nd: YAG-CQ2 ve Excimer-Laser ile yapılan kanal genişletmelerinde meydana gelen temparatür ölçüldü ve değerlendirildi. Nd: YAG ve CO^Laserlerinin ışınları yüksek temparâtürlere neden olurken. Excimer-Laserin ışınlarının meydana getirdiği ısının önemsenmeyecek kadar az olduğu saptandı. Temparatür diferans ortalamaları; Nd: YAG-La-serde 11,66°C; C02-Laserde 5,68°C ve Excimer-Laserde 0,3°C'dir. Her üç grubun aralarındaki farklar anlamlıdır (p<0.05; Mann Whitney-U-Test). Scanning elektronmikroskopi k incelemelerde sadece Excimer-Laser ile gerçekleştirilen kanal genişletmelerinde pulpa dokusunun tüm olarak ortadan kaldırıldığı, dentin kanallarının açık olduğu, smear tabakasının görülmediği ve termik iritasyonlann meydana gelmediği izlendi.
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Bu çalışmanın gerçekleşebilmesi, için kürsülerinde çatışmama, izin veren;
Hocam Prof. Dr. Sayın G. K. Siebert'e,
Prof. Dr. Sayın J. Viohl'e,
Prof. Dr. Sayın G. Müller'e,
Prof. Dr. Sayın H. Lenz'e, aynca Bayan A. D. Kâhler'e ve Bay T. Ertt'e teşekkürü bir borç bilirim.

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