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level: MICROBIO

Questions and Answers List

level questions: MICROBIO

Question	Answer
ORIGIN AND RATIONALE FOR ENDO TREATMENT	CARIES, TRAUMA, PERIODONTAL
PATHWAYS OF INFECTION: The bacteria present in the blood would be attracted to following trauma or operative procedure the produced inflammation without causing pulp exposure	Anachoresis (blood stream)
PATHWAYS OF INFECTION:broken temporary seal, tooth structure fractures before final restoration, inadequate final restoration	Faulty restoration
PATHWAYS OF INFECTION:caries & dental procedure	Dentinal tubules
When the dentin distance between the border of the caries lesion and pulp is ____ nalang ang natira, there is a higher chance na magpermeate na ang bacteria sa pulp from that caries lesion	0.2mm
PATHWAYS OF INFECTION:Direct pulp exposure - coronal fracture, iatrogenic	Open Cavity
PATHWAYS OF INFECTION:from gingival sulcus to the pulp - a lateral channel or the apical foramen as a pathway.	Periodontal membrane
Salivary contamination from the occlusal aspect can reach the periapical area in less than __ weeks in canals obturated with guttapercha and sealer	6
SPREAD OF INFECTION TO HEALTHY ADJACENT TOOTH	principal and/or lateral canals
Endodontic infections- dominated by obligate ____ bacteria in primary infections	anaerobic
most common reasons bakit hindi gumagaling yung treatment (hindi negative yung culture test); reason for failed treatments	Secondary infection
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS: include species formerly known as Bacteroides melaninogenicus.	Black pigmented Gram negative anaerobic rods
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS:saccharolytic species Prevotella	Black pigmented Gram negative anaerobic rods
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS:asaccharolytic species — Porphyromonas	Black pigmented Gram negative anaerobic rods
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS:first periodontal pathogen to be detected in endodontic infection.	Tannerellaforsythia
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS:previously called Bacteroides forsythus	Tannerellaforsythia
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS:asaccharolytic obligately anaerobic Gram negative coccobacilli	Dialister species
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS:common member of endodontic microbiota.	Fusobacterium
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS:highly motile, spiral- shaped, Gram negative bacteria with periplasmic flagella.	Spirochetes
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS: Pseudoramibacter alactolyticus	Gram positive anaerobic rods
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS: Filifactor alocis	Gram positive anaerobic rods
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS:Actinomyces spp.	Gram positive anaerobic rods
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS: Propionibacterium propionicum	Gram positive anaerobic rods
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS: Olsenella spp.	Gram positive anaerobic rods
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS:Slackia exigua	Gram positive anaerobic rods
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS:Mogibacterium timidum	Gram positive anaerobic rods
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS:Eubacterium spp	Gram positive anaerobic rods
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS:Panrimonas micra (previously called Peptostreptococcus micros or Micromonas micros)	Gram positive
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS: Streptococcus anginosus	Gram positive
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS: Streptococcus mitisi	Gram positive
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS: Streptococcus sanguinis	Gram positive
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS: Enterococcus faecalis. lactobacilli	Gram positive
FUNGI AND VIRUSES:Fungi particularly, ____	Candida spp.
FUNGI AND VIRUSES:Archaea — Methanogenic archaea have been detected in __________	periodontal disease and chronic apical periodontitis
FUNGI AND VIRUSES:Require viable host cells to infect and use the cell's machinery to replicate the __ genome cannot survive in a necrotic root canal	Viruses
"FUNGI AND VIRUSES:reported only for non-inflamed vital pulps of patients infected with HIV and HSV where living cells are found in abundance	Viruses
FUNGI AND VIRUSES:implicated in the pathogenesis of apical periodontitis	Herpes spp., - human cytomegalovirus and Epstein-Barr virus
Cause of acute apical abscess with purulent inflammation in periapical tissue.	PERI-RADICULAR INFECTIONS
PERI-RADICULAR INFECTIONS dominant bacteria	anaerobic bacteria
SPECIES MOST COMMONLY RECOVERED FROM ROOT CANALS UNDERGOING RETREATMENT, IN CASES OF FAILED ENDODONTIC THERAPY AND CANALS WITII PERSISTENT INFECTIONS.	FAECALIS AND YEAST, MAINLY C. ALBICANS
TRUE OR FALSE: E. Faecalis can endure prolonged periods of starvation and utilize tissue fluid from the pulp	FALSE
TRUE OR FALSE: E. Faecalis can Live and persist in poor nutrient environment	TRUE
TRUE OR FALSE: E. Faecalis can Survive in the presence of several medications (e.g., calcium hydroxide) and irrigants (e.g., sodium hypochlorite)	TRUE
TRUE OR FALSE: E. Faecalis Form biofilms in unmedicated canals	FALSE
TRUE OR FALSE: E. Faecalis Convert into a viable and cultivable state	FALSE
TRUE OR FALSE: E. Faecalis Acquire antibiotic resistance	TRUE
TRUE OR FALSE: E. Faecalis Survive in extreme environments with high PH, high salinity and high temperatures	FALSE
TRUE OR FALSE: E. Faecalis Invade and metabolize fluids within the dentinal tubules and adhere collagen	TRUE
Multiple visits or temporarily left open - species is a ________________ in treated root canals rather than a persistent from unsuccessfully treated primary infections	secondary opportunistic colonizer
Persistent primary Infection - microorganisms remained in the root canal - ____is more frequently retrieved from root canals after previous treatment	E. faecalis
Three major components in biofilm formation	bacterial cells, a solid surface and a fluid medium
Root canal infections are____mediated	biofilm
ENDODONTIC BACTERIAL BIOFILMS CATEGORY:root canal dentin	Intracanal biofilms
ENDODONTIC BACTERIAL BIOFILMS CATEGORY:root surface biofilms (asymptomatic periapical periodontitis and in chronic apical abscesses with sinus tracts).	Extra-radicular biofilms
ENDODONTIC BACTERIAL BIOFILMS CATEGORY:may or may not be dependent on the root canal.	Periapical biofilms
ENDODONTIC BACTERIAL BIOFILMS CATEGORY:bacteria adhere to an artificial biomaterial surface and form biofilm structures.	Biomaterial-centered infections
IRRIGATING SOLUTIONS TO DISSOLVE BIOFILM	EDTA, CHX, QMIX, MTAD, Citric Acid