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Types of Cementum


A. Acellular Cement. Acellular cement, primarily responsible for attaching the tooth alveolar ridge (Fig. 2-20).

1. Does not contain live cells within its mineralized tissues

2. The first will be created, and covers about cervical third or half of the root

3. No new acellular cement produced during the life of the tooth

4. Thickness varies from 30 to 60

5. Sharpey fibers make up the majority of the structure acellular cement

B. Cellular Cement

1. Contains cementoblasts and fibroblasts within its mineralized tissues (Fig. 2-20)

2. Formed after tooth erupted, and less sodium than acellular cement

3. Storage periods of time throughout the life of the tooth (thickness increases with age)

4. The thickness varies from 150 to 200

5. Sharpey fibers make up a smaller part of cellular cement.

Cementum tooth

4. Relations cement enamel in the FAC.

In cement covering root can have one of three relations with enamel of a tooth crown. In order of frequency, cement, can overlap enamel, responsible enamel, or there is a gap between the cement and enamel. This order of frequency is known as the OMG (overlapping, meet, gap) (Fig. 2-21).

And overlap in 60% of cases, cement blocks enamel over a short distance.

B. occur in 30% of cases, the cement meets the enamel.

C. the gap in 10% of all cases, there is a small gap between the cement and enamel (Baring dentin in this area). The patient may feel discomfort (dentinal sensitivity) for instrumentation. The use of local anesthesia can be useful when Toolkit, desensitization and sensitive areas must meet the following tools. Four types of cementum..

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