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258 Cards in this Set
- Front
- Back
|
When gaining access in older teeth
|
The chamber is too small to fall into
|
|
|
When confirming the location of the pulp chamber with the D16 endo explorer, the explorer is directed?
|
Directed along the long axis of the tooth
|
|
|
A type 3 canal is one that has
|
two canals exiting from the chamber which continue as 2 separate canals to the root apex
|
|
|
Lower anteriors?
|
May have more than canal a significant % of time
|
|
|
The working length of the tooth can be defined as?
|
The distance from the incisal reference point of the tooth to 1 mm short of the radiographic apex
|
|
|
T/F When the file is outside of the apex, shoreshorteining or elongating the film may show the file outside the tooth but there no way of knowing how much it is beyond the radiographic apex?
|
TRUE
|
|
|
If a stop is placed on the file crooked?
|
The working length can be wrong by 1 or 2 mm
|
|
|
When the file is placed in the tooth short of the apex and the file elongated?
|
The file appears to be at a distance much further away from the radiographic apex than it actually is
|
|
|
the three standarized manufacturing lengths of the files used in the endo clinic at osu are
|
21,25, 30
|
|
|
T/F A common error in access preparation in posterior teeth is to mistake the initial prep opening for the canal orifice?
|
TRUE
|
|
|
T/F The completed access opening in maxillary and mandibular bicuspids is broader in a mesio-distal direction than in facio-lingual direction
|
FALSE
|
|
|
Radiographic elongation errors are caused by?
|
Too little vertical angulation
|
|
|
T/F You must work both canals at the same time when they occour in the same root?
|
TRUE
|
|
|
The final size recommended for intermediate sized canals is?
|
45
|
|
|
In the illustrated radiograph the cone (and beam) were directed mesially. Which file is too long?
|
Mesial buccal
|
|
|
In the illustrated radograph the cone were directed distally. Which mesial file too long?
|
Mesial lingual
|
|
|
T/F The D-11 and #3 spreaders are? on the working end.
|
Pointed
|
|
|
T/F Two canals may be prestnt in thedistal rooth of the mandibular 1st?
|
TRUE
|
|
|
T/F The use of the D-16 endo ex;lorer is not necessary for exploring the chamber in posterior teeth since they have a large chamber?
|
FALSE
|
|
|
The access preparation in the occlusal surface of a mandibular 1st molar should be
|
Trapezoidal
|
|
|
The function of the root canal sealer is to fill discrepancies between the fit of the filling material and the dentin walls
|
TRUE
|
|
|
Gutta percha cones are approximately 60-75% zinc oxide
|
TRUE
|
|
|
We dont or cant use fine medium accessory cones as master points above the size #45 becasue
|
They are long enoughto reach the wroking length after they are customized
|
|
|
In smaller canal or canals with root curvatures, we want to adjust the stop on the spreader 2 mm shorter than the working length (if no bind occurs) or 2mm shorter than were the spreader binds in the canal?
|
TRUE
|
|
|
When there is a possibility of two canal occuring in one root?
|
Always determin the working length simultaneously
|
|
|
The dentin cemental jxn is?
|
A natural constriction of the root canal apically
|
|
|
If the file is not lubricated by an irrigant, it will have a tendency to engage the wall short of th working lenth
|
TRUE
|
|
|
According to the buccal object rule when the cone head is directed toward the distal of a two rooted bicuspid
|
The buccal canal is always distal in relation to the lingual canal
|
|
|
According to the buccal object rule when the cone head is directed toward the mesial of a two rooted bicuspid
|
The buccal canal is always mesial in relation to the lingual canal
|
|
|
Always determine a working simultaneously for each canal when there is a possibilty of two canals occuring in 1 root
|
TRUE
|
|
|
barbed bbroach must never be forcd apically because?
|
The barbs may engage the dentin walls and separate
|
|
|
Clinically when 2 canals exist in the same roo, the most reliable method for determining the apical termination of each canal is by
|
Varying the horizontal angulaion to sepate the canl radiographically
|
|
|
The object of using the gates glidden bur is to plane the side walls of the canal?
|
FALSE
|
|
|
Gates fglidden burs
|
Clean and prepare the coronal and middle portions of the canal
|
|
|
When we refer to an apical sop, we mean
|
A preparation in the apical dentis which prevents the gutta percha from exiting the apical foramen
|
|
|
In the step back procedure, the files are worked to the full working lenth
|
FALSE
|
|
|
To prevent blockage of a canal with accumulating dentin you must
|
"3 Periodically go back with small files to the calculaed working length
|
|
|
Absorbent paper points are used to?
|
"2 & 3
|
|
|
Rubber stops are used to mark a distance on?
|
"1,2,3
|
|
|
The action used for placing a file into a canal should resemble
|
A clockwise counterclockwiese motion with pressure directed apically
|
|
|
Pulpectomy is the ?
|
removal of the entire pulp
|
|
|
In treating a root canal before obtguration with gutta percha the most important consideration is ?
|
Thorough cleaing and shaping of the canal
|
|
|
The minimum size file used to the working length for an ideal canal prep is a
|
#30
|
|
|
An apical stop in the root canal is prepared with insturments approximately? short of the radiographic apex when possible
|
1 mm
|
|
|
A size? Gates glidden drill is usually used in a post and core prep following obturation
|
#3
|
|
|
In making a preparation for a post and core on a maxillary centaral incsor at least ? of gutta percha should be left in the apical section
|
4 mm
|
|
|
The minimal ideal enlargement of a canal for placing a post and core is to a size?
|
#70 file
|
|
|
The diameter of a root canal, as seen on the original exray willusually dictate the size file used to take the prvisional working length exray?
|
FALSE
|
|
|
In order to conserve tooth structure the access opening is usually smaller than the pulp chamber width?
|
FALSE
|
|
|
Initially, access opening in posterior teeth are made with?
|
A #4 round bur (high speed FG)
|
|
|
Endo files are used primarily
|
To enlarge and shape the root canal
|
|
|
The access opening for anteror teeth are mosays made on the
|
Lingual
|
|
|
The provisional lenth is the lenth to which the canal is sterilized before takkng an xray
|
FALSE
|
|
|
A provisional lenth exray shows the tip of the file 1 mm from the apex. this an acceptable xray to be used inthe calcualatgin the working length?
|
TRUE
|
|
|
Recapitulaion in the endo prep procedures means
|
Returning to the smalles file between each file used during the preparation
|
|
|
The best method of lcating an orifice of a molar canal is to first us a #?
|
16 explorer
|
|
|
Whatis the diameter at the tip where the cutting blades begin D0 of a #25?
|
.25mm
|
|
|
The size of agates glidden bur is identified by
|
The number of ring around the bur shaft
|
|
|
This picture is an
|
Endo excavator #31L
|
|
|
This is ?
|
An endo explorer
|
|
|
In general, an endo explorer is used to
|
Probe for a canal orifice
|
|
|
Which of the above is a Gatges glidden drill?
|
C
|
|
|
What is its size classification?
|
#6
|
|
|
The mesial lingual canal of a mandibular first molar is lcoated
|
Just lingual o the mesial dvp grooved of the mesial marginal ridge
|
|
|
The diameter size of an endo file may be identified by
|
"1 a numeral on the hub
|
|
|
The mesiobuccal root of an upper first molar is usually
|
Wide buccolingually
|
|
|
Accessory canals are most often detected
|
Obturation of the main canal
|
|
|
Access preparation on the molars require a?
|
#4 round bur
|
|
|
A palatal root on a n upper first molr will frequently curve to the
|
Lingual
|
|
|
As a rule the mesial canals of lower molars in an adult are usually more
|
curved and smaller than distal canals
|
|
|
The anatomical apex is the same as the radiographic apex
|
FALSE
|
|
|
The root canal in the mid-root section of maxillary premolrs is the widest in the buccal lingual direciton
|
TRUE
|
|
|
The apical foramen always exits the tooth at its radographic apex
|
FALSE
|
|
|
Which of the follwing teeth rarely have additional main canals?
|
|
|
|
Radiographic elongation errors are caused by?
|
Too little vertical angulation
|
|
|
Which of the the avove is a barbed broach
|
D
|
|
|
An exray is taken with the final used in place to
|
Confirm the correct working length
|
|
|
A serious drawback with the use of pastes only as a canal filling material is the difficulty in
|
Exercising measurement control
|
|
|
Absorbent paper points are used to ?
|
"2 & 3
|
|
|
In order to conserve tooth structure the access opening isusually smaller than the pulp chamber width
|
FALSE
|
|
|
Which would not be a true fact regarding gutta percha points used in the course
|
Dimensional stability
|
|
|
The endo spreader, when properly used provides space for
|
Accessory gutta percha
|
|
|
Grossmans sealer is basically a Zn oxide eugenol mixture and also contains lead tetroxide and paraformaldehyde to enhane its therapeutic value
|
FALSE
|
|
|
Gates glidden drills are designed to safely cut efficiently at
|
Low speeds
|
|
|
Which is the correct combo of a handle color and instrument size
|
Red number 25
|
|
|
Root canal spreader D11 is blunt smooth and tapered
|
FALSE
|
|
|
Root canal spreader D11 is used for vertical condensation tecnique
|
TRUE
|
|
|
The instrument of choice for removing debris from the pulp chamber i
|
#40 file
|
|
|
Fates glidden burs are effective in praring smal, curved canals due to the flexibility of the long thin tapering shaft
|
FALSE
|
|
|
Post and core preparation cannot be done at a different appointment than he canal filling appointment?
|
FALSE
|
|
|
Dr. Jon Ingles two year study of endo failures revealed that the predominant cause of failure was
|
Indadequate apical seal
|
|
|
The pulp chamber of the macillary first bicuspid is shaped as follows
|
More narrow mesiodistally
|
|
|
The procedure illustrated obove is an excellent method of determining the distance from incisal edge to pulp chamber
|
TRUE
|
|
|
The area show by the arrow in the preceeding illustration is
|
the lingual shoulder
|
|
|
The above illustration shows which type of canal configuration
|
Type 2
|
|
|
If a radiograph show a narrowing of the canal in the apical half (such as the illustration above) chances are good
|
That there are two canals present
|
|
|
When comparing the final file radiograph and final \fill radiograph, the filling material extends to the same apical point as the final file
|
TRUE
|
|
|
The dentino cemental jxn is an artificially prepared construction of the canal
|
TRUE
|
|
|
Failure to remove debris form the pulp horns may cause leakage into the root canal when the tissue degenerates
|
FALSE
|
|
|
When a file is placed in a tooth short of the apex and the film elongated, the film appears to be at a distance ? the radographic apex than it actually is
|
Much further away
|
|
|
Radiographic foreshortening errors are caused by ? vertical angulation
|
Too much
|
|
|
If the master piont is withdrawn with the spreader
|
It was not properly fitted
|
|
|
If a radiofraph taken to check the obturation shows an undrill or an overextension of the gutta perch, the maerial can be removed and the canal prepared and the gutta percha refitted
|
TRUE
|
|
|
A root canal filling terminates the same distance form the radiographic apex in vital as well as necrotic teeth
|
TRUE
|
|
|
The above illustration shows which tgype of canal confiuration
|
Type 3
|
|
|
5. All of the above"
|
?
|
|
|
Rotary instrumentation begins with a hand file?
|
TRUE
|
|
|
Irrigation solution and lubricant can be used at the same time when preparing canals
|
TRUE
|
|
|
Advantages of NiTi files include their extreme flexibilty and that they don not weaken following sterilization
|
True...?
|
|
|
The electric motor should set at
|
300 rpm
|
|
|
Before beginning any access opening, what shuould you do?
|
Carefully study the radiograph
|
|
|
When confirming the location of the pulp chamber with the D16 endo explorer
|
the explorer is directed? Directed along the long axis of the tooth
|
|
|
T/F When the file is outside of the apex
|
shoreshorteining or elongating the film may show the file outside the tooth but there no way of knowing how much it is beyond the radiographic apex? TRUE
|
|
|
the three standarized manufacturing lengths of the files used in the endo clinic at osu are 21
|
25
|
|
|
In smaller canal or canals with root curvatures
|
we want to adjust the stop on the spreader 2 mm shorter than the working length (if no bind occurs) or 2mm shorter than were the spreader binds in the canal? TRUE
|
|
|
If the file is not lubricated by an irrigant
|
it will have a tendency to engage the wall short of th working lenth TRUE
|
|
|
Clinically when 2 canals exist in the same roo
|
the most reliable method for determining the apical termination of each canal is by Varying the horizontal angulaion to sepate the canl radiographically
|
|
|
When we refer to an apical sop
|
we mean A preparation in the apical dentis which prevents the gutta percha from exiting the apical foramen
|
|
|
In the step back procedure
|
the files are worked to the full working lenth FALSE
|
|
|
Rubber stops are used to mark a distance on? "1
|
2
|
|
|
The diameter of a root canal
|
as seen on the original exray willusually dictate the size file used to take the prvisional working length exray? FALSE
|
|
|
Initially
|
access opening in posterior teeth are made with? A #4 round bur (high speed FG)
|
|
|
In general
|
an endo explorer is used to Probe for a canal orifice
|
|
|
The endo spreader
|
when properly used provides space for Accessory gutta percha
|
|
|
Fates glidden burs are effective in praring smal
|
curved canals due to the flexibility of the long thin tapering shaft FALSE
|
|
|
When comparing the final file radiograph and final \fill radiograph
|
the filling material extends to the same apical point as the final file TRUE
|
|
|
When a file is placed in a tooth short of the apex and the film elongated
|
the film appears to be at a distance ? the radographic apex than it actually is Much further away
|
|
|
If a radiofraph taken to check the obturation shows an undrill or an overextension of the gutta perch
|
the maerial can be removed and the canal prepared and the gutta percha refitted TRUE
|
|
|
Before beginning any access opening
|
what shuould you do? Carefully study the radiograph
|
|
|
When confirming the location of the pulp chamber with the D16 endo explorer
|
the explorer is directed? Directed along the long axis of the tooth
|
|
|
T/F When the file is outside of the apex
|
shoreshorteining or elongating the film may show the file outside the tooth but there no way of knowing how much it is beyond the radiographic apex? TRUE
|
|
|
the three standarized manufacturing lengths of the files used in the endo clinic at osu are 21
|
25
|
|
|
In smaller canal or canals with root curvatures
|
we want to adjust the stop on the spreader 2 mm shorter than the working length (if no bind occurs) or 2mm shorter than were the spreader binds in the canal? TRUE
|
|
|
If the file is not lubricated by an irrigant
|
it will have a tendency to engage the wall short of th working lenth TRUE
|
|
|
Clinically when 2 canals exist in the same roo
|
the most reliable method for determining the apical termination of each canal is by Varying the horizontal angulaion to sepate the canl radiographically
|
|
|
When we refer to an apical sop
|
we mean A preparation in the apical dentis which prevents the gutta percha from exiting the apical foramen
|
|
|
In the step back procedure
|
the files are worked to the full working lenth FALSE
|
|
|
Rubber stops are used to mark a distance on? "1
|
2
|
|
|
The diameter of a root canal
|
as seen on the original exray willusually dictate the size file used to take the prvisional working length exray? FALSE
|
|
|
Initially
|
access opening in posterior teeth are made with? A #4 round bur (high speed FG)
|
|
|
In general
|
an endo explorer is used to Probe for a canal orifice
|
|
|
The endo spreader
|
when properly used provides space for Accessory gutta percha
|
|
|
Fates glidden burs are effective in praring smal
|
curved canals due to the flexibility of the long thin tapering shaft FALSE
|
|
|
When comparing the final file radiograph and final \fill radiograph
|
the filling material extends to the same apical point as the final file TRUE
|
|
|
When a file is placed in a tooth short of the apex and the film elongated
|
the film appears to be at a distance ? the radographic apex than it actually is Much further away
|
|
|
If a radiofraph taken to check the obturation shows an undrill or an overextension of the gutta perch
|
the maerial can be removed and the canal prepared and the gutta percha refitted TRUE
|
|
|
Before beginning any access opening
|
what shuould you do? Carefully study the radiograph
|
|
|
When gaining access in older teeth
|
The chamber is too small to fall into
|
|
|
When confirming the location of the pulp chamber with the D16 endo explorer, the explorer is directed?
|
Directed along the long axis of the tooth
|
|
|
A type 3 canal is one that has
|
two canals exiting from the chamber which continue as 2 separate canals to the root apex
|
|
|
Lower anteriors?
|
May have more than canal a significant % of time
|
|
|
The working length of the tooth can be defined as?
|
The distance from the incisal reference point of the tooth to 1 mm short of the radiographic apex
|
|
|
T/F When the file is outside of the apex, shoreshorteining or elongating the film may show the file outside the tooth but there no way of knowing how much it is beyond the radiographic apex?
|
TRUE
|
|
|
If a stop is placed on the file crooked?
|
The working length can be wrong by 1 or 2 mm
|
|
|
When the file is placed in the tooth short of the apex and the file elongated?
|
The file appears to be at a distance much further away from the radiographic apex than it actually is
|
|
|
the three standarized manufacturing lengths of the files used in the endo clinic at osu are
|
21,25, 30
|
|
|
T/F A common error in access preparation in posterior teeth is to mistake the initial prep opening for the canal orifice?
|
TRUE
|
|
|
T/F The completed access opening in maxillary and mandibular bicuspids is broader in a mesio-distal direction than in facio-lingual direction
|
FALSE
|
|
|
Radiographic elongation errors are caused by?
|
Too little vertical angulation
|
|
|
T/F You must work both canals at the same time when they occour in the same root?
|
TRUE
|
|
|
The final size recommended for intermediate sized canals is?
|
45
|
|
|
In the illustrated radiograph the cone (and beam) were directed mesially. Which file is too long?
|
Mesial buccal
|
|
|
In the illustrated radograph the cone were directed distally. Which mesial file too long?
|
Mesial lingual
|
|
|
T/F The D-11 and #3 spreaders are? on the working end.
|
Pointed
|
|
|
T/F Two canals may be prestnt in thedistal rooth of the mandibular 1st?
|
TRUE
|
|
|
T/F The use of the D-16 endo ex;lorer is not necessary for exploring the chamber in posterior teeth since they have a large chamber?
|
FALSE
|
|
|
The access preparation in the occlusal surface of a mandibular 1st molar should be
|
Trapezoidal
|
|
|
The function of the root canal sealer is to fill discrepancies between the fit of the filling material and the dentin walls
|
TRUE
|
|
|
Gutta percha cones are approximately 60-75% zinc oxide
|
TRUE
|
|
|
We dont or cant use fine medium accessory cones as master points above the size #45 becasue
|
They are long enoughto reach the wroking length after they are customized
|
|
|
In smaller canal or canals with root curvatures, we want to adjust the stop on the spreader 2 mm shorter than the working length (if no bind occurs) or 2mm shorter than were the spreader binds in the canal?
|
TRUE
|
|
|
When there is a possibility of two canal occuring in one root?
|
Always determin the working length simultaneously
|
|
|
The dentin cemental jxn is?
|
A natural constriction of the root canal apically
|
|
|
If the file is not lubricated by an irrigant, it will have a tendency to engage the wall short of th working lenth
|
TRUE
|
|
|
According to the buccal object rule when the cone head is directed toward the distal of a two rooted bicuspid
|
The buccal canal is always distal in relation to the lingual canal
|
|
|
According to the buccal object rule when the cone head is directed toward the mesial of a two rooted bicuspid
|
The buccal canal is always mesial in relation to the lingual canal
|
|
|
Always determine a working simultaneously for each canal when there is a possibilty of two canals occuring in 1 root
|
TRUE
|
|
|
barbed bbroach must never be forcd apically because?
|
The barbs may engage the dentin walls and separate
|
|
|
Clinically when 2 canals exist in the same roo, the most reliable method for determining the apical termination of each canal is by
|
Varying the horizontal angulaion to sepate the canl radiographically
|
|
|
The object of using the gates glidden bur is to plane the side walls of the canal?
|
FALSE
|
|
|
Gates fglidden burs
|
Clean and prepare the coronal and middle portions of the canal
|
|
|
When we refer to an apical sop, we mean
|
A preparation in the apical dentis which prevents the gutta percha from exiting the apical foramen
|
|
|
In the step back procedure, the files are worked to the full working lenth
|
FALSE
|
|
|
To prevent blockage of a canal with accumulating dentin you must
|
"3 Periodically go back with small files to the calculaed working length
|
|
|
Absorbent paper points are used to?
|
"2 & 3
|
|
|
Rubber stops are used to mark a distance on?
|
"1,2,3
|
|
|
The action used for placing a file into a canal should resemble
|
A clockwise counterclockwiese motion with pressure directed apically
|
|
|
Pulpectomy is the ?
|
removal of the entire pulp
|
|
|
In treating a root canal before obtguration with gutta percha the most important consideration is ?
|
Thorough cleaing and shaping of the canal
|
|
|
The minimum size file used to the working length for an ideal canal prep is a
|
#30
|
|
|
An apical stop in the root canal is prepared with insturments approximately? short of the radiographic apex when possible
|
1 mm
|
|
|
A size? Gates glidden drill is usually used in a post and core prep following obturation
|
#3
|
|
|
In making a preparation for a post and core on a maxillary centaral incsor at least ? of gutta percha should be left in the apical section
|
4 mm
|
|
|
The minimal ideal enlargement of a canal for placing a post and core is to a size?
|
#70 file
|
|
|
The diameter of a root canal, as seen on the original exray willusually dictate the size file used to take the prvisional working length exray?
|
FALSE
|
|
|
In order to conserve tooth structure the access opening is usually smaller than the pulp chamber width?
|
FALSE
|
|
|
Initially, access opening in posterior teeth are made with?
|
A #4 round bur (high speed FG)
|
|
|
Endo files are used primarily
|
To enlarge and shape the root canal
|
|
|
The access opening for anteror teeth are mosays made on the
|
Lingual
|
|
|
The provisional lenth is the lenth to which the canal is sterilized before takkng an xray
|
FALSE
|
|
|
A provisional lenth exray shows the tip of the file 1 mm from the apex. this an acceptable xray to be used inthe calcualatgin the working length?
|
TRUE
|
|
|
Recapitulaion in the endo prep procedures means
|
Returning to the smalles file between each file used during the preparation
|
|
|
The best method of lcating an orifice of a molar canal is to first us a #?
|
16 explorer
|
|
|
Whatis the diameter at the tip where the cutting blades begin D0 of a #25?
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.25mm
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The size of agates glidden bur is identified by
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The number of ring around the bur shaft
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This picture is an
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Endo excavator #31L
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This is ?
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An endo explorer
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In general, an endo explorer is used to
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Probe for a canal orifice
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Which of the above is a Gatges glidden drill?
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C
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What is its size classification?
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#6
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The mesial lingual canal of a mandibular first molar is lcoated
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Just lingual o the mesial dvp grooved of the mesial marginal ridge
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The diameter size of an endo file may be identified by
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"1 a numeral on the hub
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The mesiobuccal root of an upper first molar is usually
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Wide buccolingually
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Accessory canals are most often detected
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Obturation of the main canal
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Access preparation on the molars require a?
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#4 round bur
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A palatal root on a n upper first molr will frequently curve to the
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Lingual
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As a rule the mesial canals of lower molars in an adult are usually more
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curved and smaller than distal canals
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The anatomical apex is the same as the radiographic apex
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FALSE
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The root canal in the mid-root section of maxillary premolrs is the widest in the buccal lingual direciton
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TRUE
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The apical foramen always exits the tooth at its radographic apex
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FALSE
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Which of the follwing teeth rarely have additional main canals?
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|
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Radiographic elongation errors are caused by?
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Too little vertical angulation
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Which of the the avove is a barbed broach
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D
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An exray is taken with the final used in place to
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Confirm the correct working length
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A serious drawback with the use of pastes only as a canal filling material is the difficulty in
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Exercising measurement control
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Absorbent paper points are used to ?
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"2 & 3
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In order to conserve tooth structure the access opening isusually smaller than the pulp chamber width
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FALSE
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Which would not be a true fact regarding gutta percha points used in the course
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Dimensional stability
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The endo spreader, when properly used provides space for
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Accessory gutta percha
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Grossmans sealer is basically a Zn oxide eugenol mixture and also contains lead tetroxide and paraformaldehyde to enhane its therapeutic value
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FALSE
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Gates glidden drills are designed to safely cut efficiently at
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Low speeds
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Which is the correct combo of a handle color and instrument size
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Red number 25
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Root canal spreader D11 is blunt smooth and tapered
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FALSE
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Root canal spreader D11 is used for vertical condensation tecnique
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TRUE
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The instrument of choice for removing debris from the pulp chamber i
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#40 file
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Fates glidden burs are effective in praring smal, curved canals due to the flexibility of the long thin tapering shaft
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FALSE
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Post and core preparation cannot be done at a different appointment than he canal filling appointment?
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FALSE
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Dr. Jon Ingles two year study of endo failures revealed that the predominant cause of failure was
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Indadequate apical seal
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The pulp chamber of the macillary first bicuspid is shaped as follows
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More narrow mesiodistally
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The procedure illustrated obove is an excellent method of determining the distance from incisal edge to pulp chamber
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TRUE
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The area show by the arrow in the preceeding illustration is
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the lingual shoulder
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The above illustration shows which type of canal configuration
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Type 2
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If a radiograph show a narrowing of the canal in the apical half (such as the illustration above) chances are good
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That there are two canals present
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When comparing the final file radiograph and final \fill radiograph, the filling material extends to the same apical point as the final file
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TRUE
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The dentino cemental jxn is an artificially prepared construction of the canal
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TRUE
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Failure to remove debris form the pulp horns may cause leakage into the root canal when the tissue degenerates
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FALSE
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When a file is placed in a tooth short of the apex and the film elongated, the film appears to be at a distance ? the radographic apex than it actually is
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Much further away
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Radiographic foreshortening errors are caused by ? vertical angulation
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Too much
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If the master piont is withdrawn with the spreader
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It was not properly fitted
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If a radiofraph taken to check the obturation shows an undrill or an overextension of the gutta perch, the maerial can be removed and the canal prepared and the gutta percha refitted
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TRUE
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A root canal filling terminates the same distance form the radiographic apex in vital as well as necrotic teeth
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TRUE
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The above illustration shows which tgype of canal confiuration
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Type 3
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5. All of the above"
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?
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Rotary instrumentation begins with a hand file?
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TRUE
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Irrigation solution and lubricant can be used at the same time when preparing canals
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TRUE
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Advantages of NiTi files include their extreme flexibilty and that they don not weaken following sterilization
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True...?
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The electric motor should set at
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300 rpm
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Before beginning any access opening, what shuould you do?
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Carefully study the radiograph
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