essay 45 - Machine driven root canal preparation by reciprocating endoodntic files - WAVE ONE. WAVE ONE GOLD, description. sequence of working steps

what are reciprocating endodontic files?

reciprocating endodontic files are nickel-titanium instruments powered by a special motor that uses reciprocating motion, alternating clockwise and counterclockwise movements rather than continuous rotation. this motion mimics manual filing (watch winding) but with more power and efficiency. it's significantly reduces torsional stress on the file and lowers the risk of file fracture.

Types of reciprocating endodontic files

• Wave One

• Recirpoc (not mentioned in lecture)

Descriptions of NiTi reciprocating files

• NiTi reciprocating file system developed by Dentsply Maillefer

• uses special motors: X-SMART Plus or WAVEONE motor

• files are single use and come in pre sterilised blister packs

• three sizes available:

• smaill (ISO 21, taper .06)

• Primary (ISO 25, taper .08)

• Large (ISO 40, taper .08)

• comes in 21mm, 25mm and 31mm lengths

• accessories: matched paper points, gutta percha cones, obturators, THERMAPREP 2 oven

• gentle in and out (pecking) motion

Advantages of NiTi reciprocating rotary instruments

advantages:

• single use → eliminate sterilisation, lowers breakage risk

• no cross contamination

• optimised for reciprocating motion → smooth, efficient shaping

• the control of breakage and wear due to new files for every patient

Sequence of working steps with reciprocating NiTi rotary instruments

1. access cavity preparation and canal location

2. glide path with K-file (size 10-15)

3. irrigation

4. choose Appropriate WAVEONE file size

5. Determine working length (radiograph or apex locator)

6. insert file in reciprocating motion (pecking action)

7. clean file and irrigate after several pecks

8. repeat shaping until full working length is reached

9. final irrigation (use EDTA if needed)

10. dry canal and obturate using matching points/ obturators

WaveOne and WaveOne Gold - key differences

Material

• WaveOne: M-wire NiTi

• WaveOne Gold: Gold-wire NiTi (Heat-treated, more flexible)

Flexibility and strength:

• WaveOne Gold is more flexible and has a greater fatigue resistance

Cutting Design:

• WaveOne: Convex triangular cross section

• WaveOne Gold: parallelogram cross section → smoother cutting

Sizes and tapers:

• WaveOne: small (21/.06), primary (25/.08), large (40/.08)

• WaveOne Gold: adds mediumm (25/.06) and more refined tapers

Saftey and control

• WaveOne Gold reduced screwing effect → safer in curved canals

Motor compatability:

• WaveOne: X-SMART Plus, WAVEONE motor

• WaveOne Gold: X-SMART iQ, WAVEONE Gold motot

Efficiency:

• WaveOne Gold cuts more efficicnetly and smoothly

Use

• Both are single-patient, single-use