1. DENTAL PLAQUE AND CALCULUS BY
2. DENTAL PLAQUE OUTLINE
FORMATION OF DENTAL PLAQUE
TYPES OF DENTAL PLAQUE
CLINICAL SIGNIFICICANCE OF ENTAL PLAQUE
THE CARIOGENECICIY OF PLAQUE
3. INTRODUTION Dental plaque are adherent deposits that are formed on the surface of the tooth .it consists of an organic matrix containing a dense concentration of bacterial. It is formed rapidly and abundantly in the presence of a high sucrose diet.
It is found on the lingual or labial surface of the anterior teeth OR on the buccal or lingual surface of the posterior teeth especially around the maxillary and mandibular 1st molars.
Dental plaque resists the friction of food during mastication.it can only be detected clinically after it has reached a certain thickness but small amount can be made obvious when stained with disclosing agents (disclosing tablets).
In stagnation areas, the bacterial in dental plaque can form acids from sugar in the mouth over a period of time which attack tooth surface
4. DEFINITON CLINIALLY, dental plaque is a tenaciously adherent deposit that form on the tooth surface which is made up of an organic matrix containing a dense concentration of bacterial if not removed regularly can mineralize leading to dental calculus and then to periodontal problems.
5. The bacterial in dental plaque The early colonizers;
S. denticola. etc
6. Late colonizers P. gingivalis
Prevotella inter media
Motile gram-ve rods. etc
7. Specific plaque hypothesis states that, not all plaque is pathogenic and its pathogenicity depends on the presence of certain specific microbial pathogens in the plaque.
8. Formation of dental plaque Pellicle deposition on the tooth surface.
The bacteria must adhere to the pellicle
They must grow and adhere to each other.
9. Pellicle deposition Following tooth eruption or dental prophylaxis, salivary proteins rapidly and selectively adsorb onto the enamel surface to form an acquired enamel pellicle.
E.gs of salivary proteins are;
10. Bacteria adherence During initial adherence, interactions occur mainly between specific bacterial and the pellicle.
The lectins in the bacteria surfaces recognize specific carbohydrate structure in the pellicle and become linked.