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Physiology
The neck of the sperm cell is a small structure that connects the head, which contains the nucleus with the chromosomes, to the tail, which is responsible for the sperm's movement.
Pedodontics
A diastema, or space between teeth, can be a normal finding in children, especially during the mixed dentition phase. The presence of a 2 mm diastema between the maxillary central incisors in a 7-year-old is often due to the normal eruption pattern o
Oral Medicine
Amoxicillin, clindamycin, and cephalexin are all commonly recommended as premedications for patients with valvular heart disease or congenital cardiac defects before dental procedures. The choice of antibiotic may depend on the patient's allergies