A child has an anterior cleft, this happened when:
a. 4-6 weeks intrauterine ***
In GV Black classification, the angle is:
a. Third number ***
What causes tooth decay class 6?
Tooth decay is caused by bacteria and other things. It can happen when foods containing carbohydrates (sugars and starches) are left on the teeth. Such foods include milk, soda, raisins, candy, cake, fruit juices, cereals, and bread. Bacteria that normally live in the mouth change these foods, making acids.
What causes a Class 5 cavity?
Carious class V cervical lesions are the result of chronic plaque accumulation at the cervical third of the tooth in conjunction with a significant intake of fermentable carbohydrates. An additional risk factor is reduction in salivary flow and salivary quality due to xerostomia.
Where is the most common cavity?
Decay most often occurs in your back teeth (molars and premolars). These teeth have lots of grooves, pits and crannies, and multiple roots that can collect food particles. As a result, they're harder to keep clean than your smoother, easy-to-reach front teeth. Certain foods and drinks.
Who gave the Class 6 cavity classification?
Class VI cavities were described in W.J. Simon's 1956 operative dentistry textbook: “To Black's cavity classifications, a sixth category is occasionally added known as the Class VI cavities in the incisal edge or occlusal cusps due to either abrasion, erosion, or attrition.”
What is a Class 3 tooth?
Class III:
Class III is where the lower first molar is anterior (or more towards the front of the mouth) than the upper first molar. In this abnormal relationship, the lower teeth and jaw project further forward than the upper teeth and jaws.
How many types of caries are in Black's classification?
G.V. BLACK'S CLASSIFICATION OF DENTAL CARIES
Black's original classification consisted of five categories, with a sixth added later (Table 1). Today, much more is known about the caries disease process and how to most effectively treat it.
What is Class I classification of dental caries?
Class I: Caries affecting pits and fissures on occlusal third of molars and premolars, occlusal two-thirds of molars and premolars, and lingual part of anterior teeth. Class II: Caries affecting proximal surfaces of molars and premolars.
Where is Class 6 cavity?
Class VI. This decay is found on the top surfaces of the teeth, either the incisal edges of front teeth or the cusp tips of back teeth.
What is Class 6 of dental caries?
Class VI caries lesion of posterior teeth usually occurs on the cusp tips which are usually sites due to the absence of obvious patencies like pits and fissures that serve as areas for biofilm formation and plaque accumulation. Therefore the etiology remains unknown [5].
What is the GV Black classification?
G.V. Black (1836-1915) developed a system to categorize carious lesions based on the type of tooth affected (anterior or posterior tooth) and the location of the lesion (e.g. lingual, buccal, occlusal, etc.).
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