Invitro Effect of Er:YAG laser on exposed dentinal tubules
(Scanning electron microscope and Stereomicroscope assessments)
This study was designed to evaluate the effects of Er:YAG laser exposure with different parameters on exposed dentin in human teeth in vitro, using scanning electron microscope and stereo- microscope examination.
40 impacted third molars were prepared and divided into 3 groups (A, B, and C).
Group A (control group) included 40 un-exposed lingual halves.
Group B and C (experimental groups) 20 buccal halves for each were irradiated with exactly the same exposure parameters (Energy = 200 mj , Frequency = 5 Hz, ,Pulse duration = 5 milliseconds, Mode = XLP ), with extreme long pulse and contact mode.
The time of exposure was 15 seconds for group B and 30 seconds for group C.
The specimens were studied by both scanning scanning electron microscope (SEM) and stereo-microscope.
Extension of the laser exposure irradiation time produced more melting effects on dentin surface with maintenance of pulp safety
Dr.Dina Mohamed Mohamed El-Said Mohamed Hassouna is a Lecturer assistant in Oral biology-Fayoum University.She has graduated from faculty of Oral and Dental Medecine-Cairo University,finished Master degree in oral biology-Faculty of Oral and Dental Medecine-Cairo University and Phd student-Faculty of Dentistry-Ain Shams University