#8 rct teeth projects

all fiber posts are made of _____________ that reflect…

translucent or opaque fiber resin materials; reflects the natural hues of the tooth and eliminates shadows though all ceramic crowns or composite restorations at the gingival/crown interface

all fiber posts have an elasticity performance the rivals that of dentin, why is this important

less risk of fx of the root since loading is more evenly distributed

all fiber posts are ______ brittle than ceramic root posts/crown interface

less

advantages of fiber lux

• cylindrical design ideal for universal post application

• translucent, light transmitting for fast on-command cementation

• rounded, undercut double-head design → optimal core retention

• strength

how many sizes does fiber lux have

6

why is the rounded design ideal in parapost fiber lux

minimizes stress in the core material due to polymerization shrinkage

what do the uniformly unidirectional fiber clusters do for parapost fiber lux

strengthen the post structure without compromising flexibility

can parapost fiber lux be seen radiographically

can be seen clearly

parapost fiber posts are made for the use of… to provide…

resin based cement and core build-up materials; to provide an optimal “monoblock” between the dentin-post-crown, resulting in one cohesive restoration w outstanding durability and strength

order of color coded twist drills

brown → yellow → blue → red → purple → black

what are the measurements of the bands on the parapost drills

7, 9, 11 mm

how many mm of gutta percha do you want to keep to preserve the apical seal

5 mm

t or f: the use of leuto spiral is recommended when using relyx unicem 2 automix cement to cement a post

false

properties of relyx unicem 2 automix cement to cement a post

is self etch, self adhesive, and dual cure → so no bonding and conditioning of the tooth structure is necessary

how to prepare the post for cementation

clean w alcohol → dry it w water-free and oil-free air

working time for relyx unicem 2 automix

form start of mixing: 2 min

times for light curing relyx unicem 2 automix

• single surface from occlusal: 20 sec

  • addition of any other surface: 20 sec per

• relyx fiber post posts from occlusal: 40 secs

time for self curing: polymerization start after start of mixing

2:30

time for polymerization end after start of mixing

6 min

what tip do you need to add to relyx unicem 2 automix cement to cement a post

endo tip

when cementing a post w relyx unicem 2 automix cement, you want to slowly move the tip _________

upwards

when cementing a post w relyx unicem 2 automix cement, you want a ___ second “_________ filling”

5; immersion

when cementing a post w relyx unicem 2 automix cement, how do you seat the post after the canal has been filled w cement

seat, rotate, and apply moderate pressure

after seating a post w relyx unicem 2 automix cement, you can remove excess after ____ min of self-cure time

3

relyx unicem 2 automix cement if dual cure, so you can wait ____ min or cure for _____ sec

6 min; 40 sec

when cementing a post w relyx unicem 2 automix cement, what can you use for the buildup

composite resin

steps for direct casting technique using parapostxp casting components

1. prepare canal

2. place gold post or burn-out post

3. build-up resin pattern, then remove

4. fabricate temp crown using a temp post

5. take build-up resin pattern to lab to sprue, invest and cast

6. cement final restoration

steps for indirect casting technique using parapostxp casting components

1. prepare canal

2. place impression post and take impression → post will be in impression

3. fabricate temp crown using a temp post

4. lab will take impression to:

   1. pour master model and place burn-out post

   2. wax-up core, sprue, invest and cast

5. cement final restoration

w the indirect casting technique using parapostxp casting components, the impression post should be modified by…

cut, heat, then paint w impression adhesive

is it essential that the reline material extends all the way down the post space for a temp post

no → by engaging the apical portion of the post space, the wire will enhance resistance of the interim restoration

the nail head of the temporary post should extend ___ mm outside the canal space

2-3 mm