I'm a dental student and i want to train in my vacation with an expert dentist to have an experience and knowledge any help please?

Contact local dentis: Contact local dentists in your area, interns and assistants are always welcome.

Local Dental Society: Give them a call... I'm sure they have a list of practitioners who could help you.

AEGD Program: provides dental students with the training in comprehensive multidisciplinary oral health care and complexity beyond that accomplished in predoctoral training. Most AEGD programs do provide a stipend during the program. Good luck!