Dental Assistant / Hygienist Practice Test

Diastema - a space between the upper central incisors

Vasoconstrictors act by constricting the blood vessels thereby decreasing blood flow in the area and lengthening the amount of time that the local anesthetic is active in that location.

Maxillary central incisors are the most frequently injured primary teeth.

Utility gloves should be worn during instrument sterilization.

2.75" is the appropriate and recommended size of x-ray beams that are to be targeted toward a patient's face during dental radiographs.

5.5 pH is the acidic level at which decalcification and demineralization of tooth enamel begins to occur.

Abfractions are the wedge-shaped lesion along the cervical margin of the teeth, usually due to fatigue or flexing of the tooth. The excess flexing causes enamel to chip off of the tooth in this area, exposing the dentin.

Periodontal pockets are the result of loss of junctional epithelium in an apical direction, indicative of bone loss.

Zinc oxide and eugenol cement is widely used in dentistry and has many purposes including impressions, temporary cement or fillings, bonding and even periodontal dressing.

60-80 degrees is ideal for calculus removal. This angulation is in regards to the face of the instrument to the tooth.