Endo tasks
Ярослава Заверуха Endo tasks
Medications
bactericide, antiinflammatory effects; dissolving necrotic tissues; stimulate the new bone formation
antibiotic solutions
consists of Detergent, 17% EDTA, 2% CHX
calcium hydroxide
causes calcium ion binder; dissolving inorganic substances
EDTA
consists of Doxycycline, Citric acid, Detergent
MTAD
dissolving organic substances, has high alkalinity, cytotoxic
NaOCl
has limited effectiveness; causes tooth discoloration; emergence of resistant bacterial strains
QMIX
Medications
EDTA + CHX
CHX + NaOCl
NaOCl + QMix
Canal is going to be instrumented by apical box technique. Instrumentation was started from file 35. What sizes of file can be expected to be a master file?
The canal is going to be instrumented with a “Crown Down” technique. After forming the orifices the 3 mm is deducted form the working length. At that length the number 50 file is binding. What will be the MAF?
Instrumentation of the canal was prepared by “step Back” technique. The instrument witch fits in apical part was file N 20. What MAF should be?
Indications for use
Step back
curved or narrow canals
narrow, curved, double curved canals
Crown down
Double flared technique
all canals
Apical box
wide streight canals
Glide path can be created by
Gates Gliden
Hand K fails N 6-15
Proglider rotary instruments
Path file rotary instruments
Niti Pathfinder instruments N10,13,17
Lentulo
Pulpextractor
Protaper
F1
tip N 25
F2
tip N 30
F3
tip N 40
F4
tip N 20
F5
tip N 50
Filling material complications
overobturation through the apical foramina, can damage the periodontium, poor length control
Master apical point does not reach estimated WL
Ledge, too big point, Plug of dentin chips in the apical part
Overfill
can enable movement of filling material into lateral and accessory canals, overfilling
Carrier-based root canal obturation
Lack of an apical stop, Use of excessive amounts of sealer, Use a master apical cone that is too small
Warm vertical condensation
Instrumentation of the canal was started from file 20, instrumentation of the apical part was completed with file 35, all instrumentation was completed with 70. What size of master gutta- percha point must be chosen for the obturation of this canal?
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