Rotary Endodontic

SystemsDr. Mohammed Ibrahim

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Rotary systems

Protaper system

ProTaper nickel-titanium rotary files substantially simplify root canal preparation, particularly in curved and restricted canals

ProTaper Configurations:1) Three shaping files --------- S X, S1 &

S2 2) Three finishing files ----- ---- F 1, F 2, F3

+3) Accessory finishing files F 4 & F 5

All files are available in 21 mm ,25 mm and 31mm lengths.

File Design Features : ProTaper shaping instruments have a convex

triangular cross-section which reduces the contact area between the file and dentin.

 But F-3, F-4, & F-5 has a reduced cross- sections with

a U- shape to facilitate a higher degree of flexibility

Shaping Files: The S-X Shaper is an auxiliary instrument used

in canals of teeth with shorter roots or to extend and expand the coronal aspects of the preparation, similar to the use of Gates-Glidden drills or orifice openers.

(Sx) has no identification ring color on its gold-colored handle and a shorter overall length of 19 mm. The Sx has a D0 diameter of 0.19mm and a D14 diameter approaching 1.20 mm. The shaping instruments have increasingly larger percentage tapers over the length of their cutting blades allowing each instrument to engage, cut and prepare a specific area of the coronal aspect of canal relocates canal orifices resulting in straight line access. Sx has a much quicker rate of taper between D1 and D9 as compared with the other ProTaper Shaping files.

S-1 and S-2 files Shaping File S-1 is designed to prepare the

coronal 1/3 of the canal, whereas Shaping File S-2 enlarges and prepares the

middle third in addition to the critical coronal region of the apical third.

Finishing Files.The three finishing F-1, F-2, F-3 + 2 Accessory

finishing files F-4, F-5 have been designed to plane away the

variations in canal diameter in the apical one-third.

F-1, F-2, F-3 have tip diameters (D0) of ISO sizes 20, 25, and 30, respectively

F-4, andF-5 Accessory files are added under the name ProTaper Universal these files has have tip diameters (D0) of ISO sizes 40 and 50 tapers

Only one finishing file is used according to canal cross sectional diameter

Canal Preparation1- Fill the pulp chamber with either Glyde or

Sodium Hypochlorite (NaOCl) for all initial negotiation procedures. Explore the coronal two-thirds of the canal with stainless steel Nos. 10 and 15 hand files, using a reciprocating back and forth motion. Work those instruments passively and progressively until they are loose.

2. re-irrigate3. Using S1 to remove the crownal ledge in

brushing motion for better straight line access. it will have a glide path of the hand file preceded it. complete finishing the crownal area this accomplished when a light resistance is encountered

4- Re irrigate , recapitulate using file 10k to negotiate the rest of the canal and establish patency then use hand file 15K to confirm working length and verify a glide path

5-Use S1 to the full length it will go easily Once it reached remove .you should never force any rotary instrument

Irrigate , recapitulate with hand file 10 ,reirrigate

6- Shaping file S-2 is now used to full working length. Once it reached remove and Irrigate, recapitulate, and re- irrigate.

Now the crownal 2/3 of the canal is optimally prepared

With the canal flooded with irrigant, work the F1 (yellow 20) to length in one or more passes.

If the F1 ceases to advance deeper into the canal, remove the file, clear its blades , then continue with its use until it reaches length.

Irrigate, recapitulate and re-irrigate.

Finishing files

Following the use of F1 to length, gauge the foramen with a 20 hand file. If the 20 hand file is snug at length, the canal is shaped and ready to fill.

If the 20 hand file is loose at length, proceed to the F2 and, when necessary, the F3, gauging after each Finisher with the 25 and 30 hand files, respectively.

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