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level: MICROBIO

Questions and Answers List

level questions: MICROBIO

QuestionAnswer
ORIGIN AND RATIONALE FOR ENDO TREATMENTCARIES, 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 exposureAnachoresis (blood stream)
PATHWAYS OF INFECTION:broken temporary seal, tooth structure fractures before final restoration, inadequate final restorationFaulty restoration
PATHWAYS OF INFECTION:caries & dental procedureDentinal 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 lesion0.2mm
PATHWAYS OF INFECTION:Direct pulp exposure - coronal fracture, iatrogenicOpen 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 sealer6
SPREAD OF INFECTION TO HEALTHY ADJACENT TOOTHprincipal and/or lateral canals
Endodontic infections- dominated by obligate ____ bacteria in primary infectionsanaerobic
most common reasons bakit hindi gumagaling yung treatment (hindi negative yung culture test); reason for failed treatmentsSecondary 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 PrevotellaBlack pigmented Gram negative anaerobic rods
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS:asaccharolytic species — PorphyromonasBlack 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 forsythusTannerellaforsythia
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS:asaccharolytic obligately anaerobic Gram negative coccobacilliDialister 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 alactolyticusGram positive anaerobic rods
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS: Filifactor alocisGram 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 propionicumGram 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 exiguaGram positive anaerobic rods
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS:Mogibacterium timidumGram positive anaerobic rods
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS:Eubacterium sppGram 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 anginosusGram positive
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS: Streptococcus mitisiGram positive
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS: Streptococcus sanguinisGram positive
ORGANISMS INVOLVED IN PRIMARY EXTRA-RADICULAR AND INTRA-RADICULAR INFECTIONS: Enterococcus faecalis. lactobacilliGram 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 canalViruses
"FUNGI AND VIRUSES:reported only for non-inflamed vital pulps of patients infected with HIV and HSV where living cells are found in abundanceViruses
FUNGI AND VIRUSES:implicated in the pathogenesis of apical periodontitisHerpes 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 bacteriaanaerobic 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 pulpFALSE
TRUE OR FALSE: E. Faecalis can Live and persist in poor nutrient environmentTRUE
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 canalsFALSE
TRUE OR FALSE: E. Faecalis Convert into a viable and cultivable stateFALSE
TRUE OR FALSE: E. Faecalis Acquire antibiotic resistanceTRUE
TRUE OR FALSE: E. Faecalis Survive in extreme environments with high PH, high salinity and high temperaturesFALSE
TRUE OR FALSE: E. Faecalis Invade and metabolize fluids within the dentinal tubules and adhere collagenTRUE
Multiple visits or temporarily left open - species is a ________________ in treated root canals rather than a persistent from unsuccessfully treated primary infectionssecondary opportunistic colonizer
Persistent primary Infection - microorganisms remained in the root canal - ____is more frequently retrieved from root canals after previous treatmentE. faecalis
Three major components in biofilm formationbacterial cells, a solid surface and a fluid medium
Root canal infections are____mediatedbiofilm
ENDODONTIC BACTERIAL BIOFILMS CATEGORY:root canal dentinIntracanal 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 BIOFILMEDTA, CHX, QMIX, MTAD, Citric Acid