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This book represent a new challenge in the Laser therapy field. It takes the effect of diode laser on the healing of wound from a molecular level by using immunohistochemical staining technique which represent one of the most advanced method used in histology and pathology. Low Level Laser effect on the biological tissue still need for further studies and by using immunohistochemistry the answers of many questions could be found.

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Dr.Warkaa Mahmood Al-Wettar is dentist and Lecturer in Oral Histology and Pathology Department. College of Dentistry ,Al-Mustansiriya University,Baghdad ,Iraq. She had an experience in tissue sectioning and staining in addition to her clinical and dental experience.

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