Gunz Dental Insight

Reciproc system decreases preparation time by a massive 62% when compared with other conventional rotary systems. [1]

One of the biggest breakthroughs in modern endodontics today has been the introduction of single-file reciprocating systems. This reciprocal motion reduces torsional loads thus, allows safer instrumentation with less working time.  

For many years we have been using continuous rotational files systems, however, there can be some drawbacks. When rotating in curved canals, it can lead to cyclic fatigue, which leads to separation and file fracture, this occurs due to repeated tensile-compressive forces being applied to the file in maximum curved areas. [2] In some cases rotary NiTi can be time consuming and require the use of many files as clinicians work through a sequence of files.  With this in mind, Dr. Ghassan Yared developed an innovating single file reciprocating system. He has been the inventor behind VDW’s RECIPROC^® system.  The RECIPROC^® movement is counter-clock wise, meaning it engages and cuts dentin, and then clock-wise, which disengages the file from the dentin to avoid taper lock and relieves stress on the file. This type of movement prevents file breakage and increases its resistance to both cyclic and torsional fatigue.[3,4,5]

The RECIPROC^® single-file NiTi range consists of three sizes of file, an R25 for narrow canals (ISO 25; 8%) an R40 for medium canals (ISO 40; 6%)  , and an R50 for wide canals (ISO 50; 5%); The range also has matching paper points and gutta-percha.  Reciproc has many advantages over the conventional rotary NiTi systems: (1) greater time efficiency because it requires only a single file to prepare all the canals with no requirement for prior glide path preparation; (2) single files are made from M-wire (heated NiTi alloy) that give them the greatest flexibility and cyclic fatigue resistance; [5]and the new RECIPROC^® blue files have been heat treated to allow for even greater flexibility allowing you to pre bend the file and improved cyclic fatigue resistance and (3) reciprocating systems, which move in rotating reciprocation movements (balanced force) with large rotating angles. [6]

Click here to learn more about reciprocating endodontics and the elastic limit of the reciprocal movement with a short video!

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REFERENCES

1. Bürklein S, Hinschitza K, Dammaschke T, Schäfer E. Shaping ability and cleaning effectiveness of two single-file systems in severely curved root canals of extracted teeth: Reciproc and WaveOne versus Mtwo and ProTaper Int Endod J. 2012 May; 45(5):449-61

2. Arias A, Perez-Higueras JJ, de la Macorra JC. Differences in cyclic fatigue resistance at apical and coronal levels of Reciproc and WaveOne new files. J Endod. 2012;38:1244–8

3. Yared G. Canal preparation with only one reciprocating instrument without prior hand filing: A new concept. Int Dent. 2012;2:78–87. 

4. Pirani C, Paolucci A, Ruggeri O, Bossu M, Polimeni A, Gatto MR, et al. Wear and metallographic analysis of WaveOne and reciproc NiTi instruments before and after three uses in root canals. Scanning. 2014;36:517–25. 

5. Saber SE, Nagy MM, Schafer E. Comparative evaluation of the shaping ability of WaveOne, Reciproc and OneShape single-file systems in severely curved root canals of extracted teeth. Int Endod J. 2015;48:109–14. 

6. Alsilani R, Jadu F, Bogari D, Jan A, Alhazzazi T. Single file reciprocating systems: A systematic review and meta-analysis of the literature: Comparison of reciproc and WaveOne. J Int SocPrev Community Dent. 2016 Sept-Oct; 6(5) 402-409