National Dental Hygiene Board Exam + Local Anesthesial Dental Hygiene Board Exams Review Online Courses
National Dental Hygiene Board Exam + Local Anesthesial Dental Hygiene Board Exams Review Online Courses
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Claire J
Claire J

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Q: Which bacteria are mainly involved in caries formation?
(A).Streptococcussalivarius(B).Streptococcusmutans(C).Streptococcussanguis(D).PorphyromonasgingivalisKeyword: cariesThe mouth is colonized by 200 to 300 bacterial species, but only a limited number of these species participate in dental decay (caries) or periodontal disease. ...  Read More
Q: The image highlights which type of caries?
(A). Recurrent caries(B). Class Icaries(C). Class Vcaries(D). Class IVcariesThe magnifier points at a dark area “under” the restoration. Thosecariesthat come back after the tooth has been treated with restorations are calledrecurrentcaries. This is not uncommon, and therefore it is...  Read More
According to the G.V. Black classification, a class III lesion is on:
(A). The cusp tip of a molar(B). The lingual surface of a molar(C). The occlusal surface of a premolar(D). The mesial surface of an incisorThe following is the G.V. Black classification of carious lesions for dental charting: Class I: occlusal surfaces of molars and premolars, facial and lingual...  Read More
The critical pH for tooth demineralization is?
The critical pH for tooth demineralization is?a. pH 5.5b. pH 6c. pH 6.7d. pH 7Answer: a. pH 5.5CRITICAL PH is the pH at which demineralization occur. Critical pH for enamel and cementum are as below:- enamel: pH 5.5- cementum: pH 6The pH of the tooth surface remains below the critical pH of 5.5 for...  Read More

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