Orthograde root canal (normal) Flashcards
What is at the end of the root
Apical delta
5-20 foramina
What angle are dentin tubules to pulp
90 degrees
Contents of pulp
soft tissue connective tissue: odontoblasts, vascular, lymphatic and nervous tissues as well as odontoblasts, fibroblasts, fibrocytes, collagen fibers, elastic fibers, blood vessels and lymph and nerves
Inflammation of the pulp
Pulpitis
Used to remove pulp at 180 degree turn
Barbed broach
Difference between k files and H files
K-Type, K-File
Twisted three or four sided tapered pyramid
K-files are more flexible then K-Reamers
Hedstrom files ( H Files)
Machine cute from a round metal blank or wire. Spiral groove on a tapered pointed instrument
Best in a push- pull technique, can engage into the dentin with a turn and pull technique
Taper of endo instruments
0.02mm
Forms of gutta percha
Crystalline Beta form is more rigid–stable at room temp, less flowable when heated
with heating it transforms to the Alpha form – brittle at room temp, flowable when heated
Step back technique
Beginning with the smallest file just shy of apex and moving back while increasing file size
WL determined first
Crown down technique
Beginning with the larger file to remove coronal debris and moving small as the file moves closer to apex
Color order
White 15, yellow 20, blue 25, green 30, black 35
Gates glidden
Used to enlarge coronal access
Peeso reamer
Coronal flaring
Bleach
NaOCL
Full stregnth between 5-6%
Most commonly used - antibacterial capacity and the ability to dissolve necrotic tissues
Strong base (pH 11), saponification occurs in organic materials, more effective at higher temperatures
Rarely allergic reaction, does react with chlorhexidines solution - creates a parachloroaniline - may be toxic
Chlorhexadine
Used for general disinfection purposes and treatment of skin, eye and throat infections
pH between 5.5-7
Cationic nature - can stay in the dentin after rinsing the canal , gives a slow release potential
Does damage fibroblasts- cautious use in repeated areas
CHX with NaOCL precipitates and has a color change - worse at 2%
CHX with EDTA has a white precipitate - creates a salt - not chemical rxn
