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DEN111- Chapter 5
Question | Answer |
---|---|
75% of the population has what kind of yeast? | candida albicans |
Dental caries: | infectious disease that is caused by a demineralization of a tooth surface |
4 factors that are necessary for dental caries to occur: | susceptible host, microorganisms, substrate (sucrose), and time |
Dental plaque: | composed of bacterial cells embedded in intercellular mix, reforms seconds after cleaning |
Most common caries-conductive bacteria in mouth: | mutans streptococci |
Periodontal disease: | caused by normal oral microbiotathat have been allowed to accumulate in plaque |
Ways periodontal disease produces disease: | damage of tissues, inflammation, interference with host mechanisms |
Types of periodontal disease: | chronic, rapidly progressive, juvenile, prepubertal |
What are some non cleansing areas of dentition? | pits and fissures, interproximal sites, gingival crevices |
Pellicle: | when glycoproteins from saliva are absorbed into the tooth surface to a thin layerthat coasts all surfaces exposed to saliva. |
Calculus or tarter: | when plaque mineralizes forming a hardened material |
Quorum sensing: | system developed by many bacteria that regulates the expression of certain genes based upon cell population density |
Mutans streptococci have all three pathogenic properties important for caries formation: | production of acids from carbs, survival at low pH, accumulation on teeth |
___________ ________ are thought to be more important in the progression of a carious lesion after other bacteria have initiated the tooth destruction. | Lactobaccillus acidophilus |
Necrotizing ulcerative gingivitis: | associated with plaque accumulation and predisposing factors, such as stress |
Periodontitis: | when the disease process affects the bone |
Most important bacterium in causing dental caries is: | Streptococcus mutans |
What dietary component is the most important in cause of dental caries? | sugars |
What causes periodontal disease? | plaque biofilm |
Plaque biofilm has about _____ billion bacteria per gram. | 200 |
What bacteria is most responsible for causing periodontal disease? | porphyromonas gingivalis |
Sucrose is converted to what polysaccharide that causes bridging between cells of streptococcus mutans during plaque biofilm formation? | Glucan |
What periodontal disease is not related to weakened host defenses? | chronic adult periodontitis |
Inflammation of the tissue in the root canal of tooth is called: | pulpitis |