• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

Card Range To Study

through

image

Play button

image

Play button

image

Progress

1/90

Click to flip

Use LEFT and RIGHT arrow keys to navigate between flashcards;

Use UP and DOWN arrow keys to flip the card;

H to show hint;

A reads text to speech;

90 Cards in this Set

  • Front
  • Back
The optimal endodontic result is difficult to achieve if the access is not properly prepared.
True
The first step in preparing an access cavity is visualization of the position of the pulp space in the tooth.
True
Bite-wing radiographs are excellent aids in determining the vertical depth needed for accessing a molar pulp chamber.
True
In molars, the floor of the pulp chamber is located in the center of the tooth at the level of the CEJ.
True
The external root surface anatomy reflects the internal pulp chamber anatomy.
True
The pulp chamber floor is lighter in color than the chamber walls.
False
Straight-line access reduces the risk of file breakage.
True
In a study of maxillary molars, older age was a significant factor in detecting fewer canals.
True
Maxillary first molars usually have three root canals.
False
The thickness of temporary filling material sealing the access cavity preparation should be a minimum of 0.5 mm.
False
The most likely place to perforate a maxillary first premolar is to the mesial, owing to the angulation and anatomy of the crown.
True
In maxillary premolar access the bucco-lingual dimension is determined by the size of the pulp chamber, regardless of root divergence.
False
Root canal treatment without rubber dam is within the standard of care at UIC if insufficient tooth structure exists for isolation.
False
A sudden change in the radiographic "density" of a root canal is a strong indication that canal calcification has occured in the apical region.
False
The number of canals present is almost always determined from the pre-operative radiograph, and rarely from the "wire measurement" image.
False
In anterior teeth the facial surface of the access prep (inside the access) is generally flat from the mesial view.
False
In anterior teeth the lingual/palatal surface of the access prep (inside the access) is generally concave from the mesial view.
False
In a multicanal premolar or molar, placing NaOCl irrigating solution in the pulp chamber for a few minutes may help locate a tiny, calcified canal by tiny bubbles coming from the undiscovered orifice.
True
The floor of the pulp chamber is sometimes porous due to furcation canals.
True
Following initial penetration into the pulp chamber of an anterior tooth, the next step is to remove the chamber roof & pulp horns.
True
Almost three of four lateral canals occurs in the apical one-third of the root canal system.
True
The apical foramen is considered the part of the root canal with the smallest diameter.
False
The distance between the major and minor diameter increases with age.
True
The apical constriction is always 1 mm from the radiographic apex.
False
The aim of root canal therapy is to prevent or cure apical periodontitis (periradicular periodontitis).
True
A basic objective of cleaning and shaping a root canal is to allow disinfecting irrigants access to the apical one-third of the root canal.
True
A wire measurement radiograph that is 2 mm or more from the ideal apical position is okay for determining working length with no subsequent radiographs needed.
False
Irrigation is only needed in non-vital canals.
False
Patency filing is accomplished with small K-files, either #10 or #15.
True
Initial apical file size (IAF) is a determinant for the desired apical preparation size.
True
"Anti-Curvature" filing produces intentional transportation of the root canal.
True
Apical "patency" involves extending the Master Apical File to WL + 1 mm.
False
The small files, #08 and #10, are almost always used in a "pathfinder" configuration.
True
Gates-Glidden drills are used mainly in preliminaryshaping of the coronal one-third of the canal.
True
Two properties of Nickel-Titanium alloys that allow continuously-rotating instruments to survive extended service in curved root canals are 1) superelasticity and 2) extreme resistance to cyclic fatigue.
False
Owing to its flexibility, Nickel-Titanium alloy instruments will not transport root canals.
False
When an instrument rotates around a curve, larger diameters will fail from cyclic fatigue after fewer revolutions than smaller diameters.
True
Using current high-tech canal preparation techniques, the goal of mechanical preparation of all root canal surfaces is routinely accomplished.
False
The safest way to determine when a Nickel-Titanium instrument should be discarded is to examine its flutes under magnification. If no distortion is seen, the instrument is safe to use again.
False
Wire measurement may be done with files larger than #15, but no larger than size #30.
True
The maximum recommended speed for use with ProFiles is 350 RPM.
True
The rotating instrument may remain stationary, but for no more than 3 to 4 seconds.
False
Early debris removal, more effective irrigation and improved instrument efficiency are benefits of "crown-down" instrumentation.
True
It is permissible to instrument a dry canal when visibility is necessary.
False
Once the powered instrumentation technique is mastered, it is not necessary to use manual files.
False
Visual inspection of Nickel-Titanium instruments is unreliable in preventing fractures.
True
As a general rule, the MAF will always be size #30 or larger, regardless of taper.
True
Circumferential filing is necessary to effectively debride oval portions of the root canal.
True
I promise to always record the length of the file used in the WM image and the reference point.
True
Hedstrom files rotated to length most effectively prepare the guide path.
False
Fractured instruments are not a hindrance to the goals of cleaning, shaping, and filling root canals, and will not adversely affect the outcome of endodontic treatment.
False
The enlargement of root canal orifices does not facilitate the negotiation and instrumentation of the apical part of root canals especially in curved canals of multi-rooted teeth.
False
The Manual enlargement of root canals with fine hand instruments does not significantly reduce the failure rate of rotary instruments.
False
Canal transportation will not result in inadequately cleaned canals with the possible outcome of persistent apical lesions.
False
By design Ni-Ti rotary instruments will not cause any canal transportation or zips in the apical third of curved canals.
False
Chemomechanical Preparation of the root canal through a combination of mechanical instrumentation and anibacterial irrigation is not the critical stage in canal disinfection.
False
The goal of canal preparation is directed towards shaping the canal so as to achieve biologic objectives and facilitate the placement of a well condensed root canal filling.
True
Studies have shown that instrumentation with Ni-Ti files led to a better prognosis compared to stainless steel files because of better maintenance of original canal shape.
True
The advantage of crown down technique is that it removes infected coronal dentin and obstructions before apical preparation and enlarges canals incrementally.
True
Ni-Ti rotary instruments are fifteen times more likely to distort or fracture at rotational speeds higher than 333 rpm.
True
Successful root canal treatment is based on these principles: dianosis and treatment planning; knowledge of anatomy and morphology; the traditional concepts of debridement, thorough disinfection, and obturation; and the coronal restoration.
True
It is possible for a root canal to be under-filled without being under-extended.
True
Teeth that are poorly obturated are often poorly prepated.
True
When bacteria are present at the time of obturation, studies show there is an inverse correlation between the quality of obturation and probability of healing.
False
At present there is no effective method for determining for certain, at the time of obturation, whether the cleaning and shaping procedures have been effective.
True
At present the consensus is that one-visit treatment procedures are acceptable when the patient exhibits a completely of partially-vital pulp, and time permits.
True
It is possible to assess the quality of the seal established during obturation with a radiograph.
False
A convenient unit of measurement in endodontics is "one one-hundredth of a millimeter."
True
When pain occurs as the result of irreversible pulpitis, obturation may occur at the initial visit because removal of the inflammed tissue will generally resolve the patient's pain.
True
According to Dr. Weeks, the three most important things in endodontic treatment are Obturation, Obturation and Obturation.
False
Ideally the tip of the post should extend to the remaining gutta-percha leaving no space between the two.
True
To insure an adequate apical seal the minimum amount of remaining gutta-percha following post space preparation should be 4 mm.
True
E. faecalis bacteria are incapable of forming a biofilm in an infected root canal.
False
Sodium hypochlorite irrigant, if used in adequate concentrations and high enough volumes is effective against E. faecalis.
True
Chlorhexidine is effective at dissolving necrotic tissue in root canals.
False
Chlorhexidine possesses residual antibacterial activity known as substantivity.
True
Calcium hydroxide is a rapidly acting antimicrobial.
False
Cvek (partial) pulpotomy is more successful in asymptomatic carious exposures than in symptomatic carious exposures of immature permanent teeth.
True
Apexigenesis is treatment designed to preserve vital pulp tissue in the apical part of the root canal in order to complete formation of the root apex.
True
Apexification is the process whereby a nonvital, immature, permanent tooth which has lost the capacity for further normal root development forms a calcified barrier at the root terminus.
True
Causative factors of reversible pulpitis include caries, exposed dentin, recent dental treatment and defective restorations.
True
Symptomatic irreversible pulpitis describes a tooth that when cold is applied it will elicit heightened and prolonged episodes of pain even after the stimulus is removed.
True
A tooth with symptomatic apical periodontitis will have an acutely painful response to biting pressure or percussion.
True
Previously treated describes a tooth that has already had nonsurgical root canal therapy performed and the root canal system has been filled with some type of root canal obturating material.
True
Histologically, asymptomatic apical periodontitis lesions are classified as cysts of granulomas.
True
A tooth with chronic apical abscess will not respond to pulpal vitality tests, radiographically will not exhibit an apical radiolucency, and will have a sinus tract associated with the tooth.
False
Hyperplastic pulpitis is a form of reversible pulpitis.
False
One of the factors that will influence whether a pulp stays inflammed or becomes necrotic is the ability of the pulp to release inflammatory fluids to avoid an increase in intrapulpal pressure.
True
Symptomatic apical periodontitis can be found in association with a vital pulp as well as a necrotic pulp.
True
Studies have shown that bacteria is the primary cause of pulp necrosis.
True