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Logic rotary system offers advantages in patency, sharpness and more

The 01 taper dental file. (Photo: Provided by Bessi)
Henrique Bassi, DDS

Henrique Bassi, DDS

Tue. 16 April 2024


There are many NiTi rotary systems in the market. Since almost 100 percent of the companies are using the same type of machine, everyone is producing a lot of different products with the same features (Martins et al, 2021). Nothing is truly new!

Logic rotary system has unique features that offer doctors several advantages (Só et al, 2023). Starting from patency, we encourage you to try rotary patency before using regular K #0.08 and #0.10 SS files! According to internal tests and doctor feedback, in 85 percent of molars, we can use only rotary to reach patency and establish a glide path. Under the clinician's point of view, this is a huge time-saver.

Unlike all other glide path files on the market, our 01 taper can negotiate 85 percent of molars without the pre-enlargement step. This means that an orifice shaper is no longer necessary. Because of its taper, this file does not become engaged in the average molar canal anatomy and negotiates the foramen in a safer manner. Its four-helix design provides the necessary strength to make this step very safe and fast (Alcalde et al, 2018).

Once the 01 glide path size establishes patency, this file also determines the use of the second file to complete your root canal preparation. This way, if the #25/01 is the choice for the glide path, the choice for the shaping file should be #25/03 or #25/05 (Pinheiro et al, 2018).

If the glide path choice is #0.30, the shape size choice is also #0.30 and so on. The Logic shape files (taper 03 and 05) also have a unique double-helix cross section and large flute distances to optimize debris removal (Pinto et al, 2021).

Combining design and sizes, we add a very unique heat treatment that allows the files to stay sharp by the end of the grinding process. There is much more to learn about Bassi Logic files. Check the manufacturer’s website (, or contact me for more information.


Editorial note:


  • Martins JNR, Silva EJNL, Marques D, Belladonna F, Simões-Carvalho M, Camacho E, Braz Fernandes FM, Versiani MA. Comparison of design, metallurgy, mechanical performance and shaping ability of replica-like and counterfeit instruments of the ProTaper Next system. Int Endod J. 2021 May;54(5):780-792. doi: 10.1111/iej.13463. Epub 2021 Jan 10. PMID: 33300121.
  • Só GB, Siocheta G, Calefi P, Alcalde M, Vivan RR, Duarte MAH, Só MVR, da Rosa RA. Cyclic and torsional fatigue resistance of a new rotary file on a rotary and reciprocating motion. Microsc Res Tech. 2023 Dec;86(12):1635-1641. doi: 10.1002/jemt.24399. Epub 2023 Aug 16. PMID: 37587834.
  • Alcalde MP, Duarte MAH, Bramante CM, Tanomaru-Filho M, Vasconcelos BC, Só MVR, Vivan RR. Torsional fatigue resistance of pathfinding instruments manufactured from several nickel-titanium alloys. Int Endod J. 2018 Jun;51(6):697-704. doi: 10.1111/iej.12879. Epub 2017 Dec 22. PMID: 29171880.
  • Pinheiro SR, Alcalde MP, Vivacqua-Gomes N, Bramante CM, Vivan RR, Duarte MAH, Vasconcelos BC. Evaluation of apical transportation and centring ability of five thermally treated NiTi rotary systems. Int Endod J. 2018 Jun;51(6):705-713. doi: 10.1111/iej.12881. Epub 2017 Dec 14. PMID: 29178173.
  • Pinto JC, Torres FFE, Santos-Junior AO, Duarte MAH, Guerreiro-Tanomaru JM, Tanomaru-Filho M. Safety and Effectiveness of Additional Apical Preparation using a Rotary Heat-treated Nickel-Titanium file with Larger Diameter and Minimum Taper in Retreatment of Curved Root Canals. Eur J Dent. 2021 May;15(2):247-252. doi: 10.1055/s-0041-1723065. Epub 2021 Feb 23. PMID: 33622011; PMCID: PMC8184271.
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