Final Files Flashcards
- Lingering pain
a. Irreversible symptomatic pulpitis
- Food impaction, cervical caries on 27 and 28 and gingival inflammation. Pain with
percussion and palpation
a. Remove caries and refer to perio to do crown lengthening before restorations?
- Toothbrush abrasion. Hypersensitivity to cold but normal response for all other clinical
tests
a. Reversible pulpitis
- Previously RCT something idk what this question was
a. Refer to endo?
- After you anesthetize what's the next step (2 variations of this same question on here)
a. Endo ice to check for sufficient anesthesia
- VRF has better prognosis than HRF
a. False
- There’s a j shaped lesion and a single 10 mm perio pocket (drop off) on a previously
treated RCT. With this information its safe to assume its VRF
a. False (bc you have to surgical expose to diagnosis this)
b. But “safe to assume” is arbitrary so discussion board this b
- Complicated root fracture has
a. Enamel, dentin, and pulp exposure
- VPT purpose to use on open apex immature tooth
a. Allowing roots to get stronger and apex to close
- Least severe of the luxation injuries
a. Concussion
- Most important factor for achieving favorable outcome
a. Dry time
- It is recommended to run avulsed tooth under tap water to clean it
a. Fase
- IRR has excellent prognosis if RCT is done before perforation into PDL space occurs.
ERR has poor prognosis
a. True, true
- Rigid and semi flexible prevents ankylosis by allowing for some small movements
a. False (not rigid)
- On a mandibular incisor there can be 2 canals. Which one are you likely to miss if you
do not create your acces incically
a. Lingual
- Access depth
a. 7mm
- Which bur for mandibular incisor access
a. #2 round or 333
- Narrowest MD access
a. Mand central
- Shape for max central incisor
a. Triangular with the base of the triangle at the incisal
- Most likely to have 2 roots
a. Maxillary 1st premolar
- Worst thing you can do during access
a. Perforation
- If you fail to locate and obturate a canal during RCT it is likely it will fail
a. True
- Mandibular molar has a ___ outline to try and avoid missing the _____ canal
a. Trapezoidal, DL
- What is true about the MB2 canal with max 1st molars
a. Seen in 95% of the cases
- Most common reason to have retreatment for max 1st molars
a. MB2
- Hardest root canal to perform?
a. Maxillary molar with 5 canals
- Biggest challenge for anesthetic (this question was also on here twice in different
variations)
a. Mandibular molar with SIP
- LA is ineffective when injecting into an infected tissue with acid pH
a. True
- You should wait for buccal infiltration until adequate IA block anesthetic (something like
that)
a. true
- Which is most important factor regarding 8.3% NaOCl
a. Don’t let the needle bind
- Endoactivator significant reduces the time necessary for NaOCl to be present in the
canal when irrigating
a. False
- Whats the first thing to do after 1 minute of EDTA use
a. NaOCl to inactivate the edta
- Find other treatment if you cannot get rubber dam on correctly as you need to have
rubber dam to preform successful RCT
a. True
- Taper of blue vortex rotary files
a. 0.06
- Which file is used for “scouting”
a. #10 SS hand file
- How to get the SS stuck in the dentin (something like that)
a. Continue clockwise rotation
- When using a straight file a ledge is created on which area
a. Outer wall of canal
- NaOCl turns into salt and water. How long does this process take to occur?
a. 3-5 minutes
- According to K… what size must the canal be enlarged to when shaping
b. Size #30
- How long must you irrigate with NaOCl for?
c. 30 minutes
- Which is true about cellulitis vs localized
d. All of the above (included things like fascial plane swelling, fever, refer, possible
hospitalization, etc.)
- When you can localize the tooth what does this mean
e. PDL has been infected
- Theres a DST whats hte periapical diagnosis
f. CAA
- Always start with tooth in question for clinical testing
g. Fase (test adjacent 2-3 for normal baseline)
- Effective working time of pulpal anesthetic
- Average working time of pulpal anesthetic
- Hardest RCT?
a. 4 root maxillary, 3 root maxillary, 3 root mandibular, 4 root mandibular
- T/F: Dental trauma affects for life
T
- Know the different files used for hand files – “Will You Really Be Going Back?”
- T/F: Accessory rotary file is the only one that is .12 taper?
a. True – (25/.12)
- All blue vortex rotary files have?
a. 0.06 taper (3 marks)
- What is the biggest problem with access?
a. “Either not unroofing canal or perforation”
- T/F: Non-perforation is better if RCT than ERR?
a. True
- T/F: You use rigid and semi-flexible splint for ankylosis for long term and no movement of teeth?
False
What is the working length of NaOCl irrigation in canal?
2 mm
What do you do after EDTA?
“I put re-check the shape of the canal cause might’ve enlarged”
Know endo access questions about roots and canals PowerPoint
What do you do for vital pulp testing for open apex permanent tooth?
Keep it vital until is closes and the roots thicken/strengthen
Vortex blue files: “go over this ppt to know what the diameters are; you might have to ID photo”
a. 0.25/0.06 through 0.45/0.06
b. 0.10/0.02 patency file
c. 0.15/0.02 glide path file
d. ALL vortex blue are 0.06 taper
i. Use in sequence so you don’t create a ledge
d. ALL vortex blue are 0.06 taper
- .12/.12 vortex Ni-Ti Rotary file: perfect for straight line access
a. Max flute diameter is 1.20mm (size #120)
Wave one Gold Files (motor driven reciprocal files; PUSH material ahead; used in 3 passes to prevent pushing debris out of end of root)
a. Small (.20/.07) YELLOW
b. Primary (.25/.07) RED we use this mostly
c. Large (.45/.05) BLACK
- Ledges - use hand files (only way to scout canal);
a. STAINLESS STEEL K-TYPE hand files in counterclockwise fashion (aka Watch-
Winding)
Know the compare/contrast of K-type files
a. K- type files:
we use these; more flexible, follow natural canal when pre-curved) b. Reamers: cuts on rotation, fewer flutes, ineffective with filing motion
i. dangerous and we don’t use at all c. Hedstrom files: machining via grinding
i. if used in rotational manner, easily broken
Know the compare/contrast of K-type files
b. Reamers:
cuts on rotation, fewer flutes, ineffective with filing motion
i. dangerous and we don’t use at all
Know the compare/contrast of K-type files
c. Hedstrom files:
machining via grinding
i. if used in rotational manner, easily broken
Dental dam is standard of care
a. isolate only the tooth to be treated
b. if you can’t isolate with rubber dam, you cannot do the RCT
- Leave rubber dam and frame on when taking radiographs?
T
- 8.3% NaOCl is used to flush out debris and clean the system
a. you cannot 100% clean a canal
- Know the color schematic, the tapering sizes, etc.
- Know the hand files
a. “Will You Really Be Going Back”
b. note that .60 is the last file size which increases by only .05 mm** c. Know Stainless Steel vs Ni-Ti files!!! (for sure on final exam 2020)
- T/F: study about no bacteria would mean no caries
a. True - caries was the number one cause of pulpal infection
- Inconclusive testing what do you do? select two options like refer to MD, refer to neurologist, check for crack (trauma lecture)
a. ANSWER: refer to MD and check for crack
- LEO is disproven:
PCOD
- T/F: ABX to relieve pain and swelling in acute infection
a. False
- Pick incorrect statement regarding pup infection:
necrotic pulp and infection in adjacent teeth
- Most common bacteria (gram - or +)
a. gram negative
b. the question was false about lateral spreading
- T/F: AAA is emergency situation, not CAA (true false question)
a. CAA no ABX b/c no fever, just drain that bitch
- AAA called Phoenix cause it can go from CAA - AAA anytime
- Radiograph with gutta percha out of the end of the apex of root and asked what this was an example
a. Perforation
- Really review the charts for pupal and peri apical dx
a. which respond to cold, heat, percussion, if there is DST then what etc.
- Chronic situations with bacteria:
anaerobic bacterial flora
- T/F: Stundquist study was
true; % of bone of cortical and medullary which was true (put true)
- Apical periodontitis choose what was incorrect:
a. necrosis and it could spread to adjacent teeth (I think), chronic/acute AP
