Endo Flashcards
Tooth #8
Asymmetrical Preparation
Cause: Excessive removal of tooth structure on one of the marginal ridges. Not accurately locating the cingulum notch
Over-Extended Access Prep Incisally
Cause: Extended prep too far incisally
Under-extended Access Prep Apically
Cause: Failue to extend prep to cingulum notch
Under-Extended Access Prep
Remedy: locate cingulum notch and extend the prep to that point
169L FG
EndoZ FG
Access: Dot #1
Halfway up the triangular ridge/slightly distal
Access: Dot 2
Just distal to the buccal groove
Access: Dot 3
Halfway up the triangular ridge/slightly distal
Access point
Penetrate the central pit to a depth of +4 mm
Access:
connect the penetration point to the DB dot-dot not impinge the DB cusp triangular ridge
Access:
Connect DB dot to the MB dot
Access:
Connect the MB dot to the P dot-parallel the mesial proximal surface when connecting the dots
Access:
Connect the P dot to the initial penetration point- DO NOT impinge on the ooblique ridge
Access:
Remove the remaining roof of the pulp chamber
Excessive Flaring
Cause: failure to keep the long access of the bur perpendicular to the occlusal plane
Under-extend prep
Remedy: Follow the chuti method-place the dots in the correct position
Access not over pulp Chamber
Lack of straight line access
Remedy: selective filing to remove dentin triangle
Hornectomy
Failure
Cause: failure to maintain the depth of the bur resulting in partial removal of the roof of the pulp chamber
Remedy: maintain a depth of 4mm relative to the central pit while connecting the dots
Severely Gouged Floor of chamber (near perforation)
Cause: Taking the bur too far passed the roof of the chamber…lack of knowledge of the tooth’s morphology
Perforation
Failure
wave one gold
Torque Control Motor
6:1 Ratio Handpiece
Wave One Gold
Wave one Gold - Degresive tapers
Apical Control Zone
Streamlined Technique
Vortex Orifice opener
Coronal Third Prepartion
Dentin Triangle-use orifice opener in a brush stroke motion (away from furcation) to remove to gain straight line access
Use orifice opener in a brushing motion…brushing away from the furcation on removal
Glidepath
a smooth radicular tunnel from canal orifice to phsiologic terminus (foraminal constriction)
Reduce torsional stress
Reduce flexing stress
Reduce taper lock
Proglider
One single mechanical glide path file
progressive tapers from 2% to 8% over its length
offers a smoother “glide path” trasition
metallurgically enhanced utilizing M-wire technology
controlled, smooth, inward cutting action
Shaping objectives
continously tapering funnel from the access cavity to apical foramen
root canal preparation should maintain the path of the original canal
apical foreman should remain in its original position
apical opening should be kept as small as practical
Pass
Stroke
pass = 3 strokes
stroke = 2-3 mm file insertion (or until it binds)
Vortex on Torque
Proglider on Torque
Waveone on Torque
Working Length
- Remove file
- measure the tip of the file to the rubber stopper
- record the length and set everything to that measurement
Leur-Lock Syringe
Obturation
use of materials and techniques to fill the entire root canal system in a three dimensional manner
System B
Used for warm vertical condensation
System B handpiece
System B settings
Obtura III
Obtura III Gun
Warm Vertical Condensation Technique
