Invitro Effect of Er:YAG laser on exposed dentinal tubules

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(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

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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

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