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Woo JY, Jang JH, Chang SW, Oh S. Screw-in force, torque generation, and performance of glide-path files with three rotation kinetics. Odontology 2024; 112:761-772. [PMID: 38102366 DOI: 10.1007/s10266-023-00879-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Accepted: 11/17/2023] [Indexed: 12/17/2023]
Abstract
We aimed to evaluate the screw-in force, torque generation, and performance of three nickel-titanium (NiTi) glide-path files with different rotational kinetics. ProTaper Ultimate Slider (PULS) and HyFlex EDM Glide-path (HEDG) files were used for canal shaping with constant rotation (CON) or the alternative rotation technique (ART). In the ART mode, the NiTi file was periodically rotated at a speed of 1.5 times faster than that in the CON mode. WaveOne Gold Glider was used with reciprocating motion (WOGG_RCP). Sixty J-shaped resin blocks were assigned to five groups: PULS_CON, PULS_ART, HEDG_CON, HEDG_ART, and WOGG_RCP (n = 12). Glide-path preparation was performed using an automated pecking device. During glide-path preparation, the screw-in force and clockwise and counterclockwise torques were recorded and the number of pecking motions required to reach the working length was determined. The centering ratio was calculated after glide-path preparation using stereomicroscopic images. Data were analyzed using one-way analysis of variance with the Games-Howell post hoc test and the Kruskal-Wallis test with Bonferroni correction. PULS_ART generated a lower maximum screw-in force than PULS_CON. The average number of pecking motions required to reach the working length by HEDG_ART was lower than that by HEDG_CON. The mean centering ratios of PULS_CON and HEDG_CON were - 0.04 and - 0.06, respectively, while those of PULS_ART, HEDG_ART, and WOGG_RCP were 0.09, 0.01, and 0.08, respectively. The ART mode reduced the screw-in force of PULS and enabled faster glide-path preparation with the HEDG file.
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Affiliation(s)
- Jee-Yeon Woo
- Department of Conservative Dentistry, Graduate School, Kyung Hee University, 23 Kyungheedae-Ro, Dongdaemun-Gu, Seoul, 02447, Republic of Korea
- Department of Conservative Dentistry, Kyung Hee University Dental Hospital, 23 Kyungheedae-Ro, Dongdaemun-Gu, Seoul, 02447, Republic of Korea
| | - Ji-Hyun Jang
- Department of Conservative Dentistry, Kyung Hee University Dental Hospital, 23 Kyungheedae-Ro, Dongdaemun-Gu, Seoul, 02447, Republic of Korea
- Department of Conservative Dentistry, College of Dentistry, Kyung Hee University, 23 Kyungheedae-Ro, Dongdaemun-Gu, Seoul, 02447, Republic of Korea
| | - Seok Woo Chang
- Department of Conservative Dentistry, Kyung Hee University Dental Hospital, 23 Kyungheedae-Ro, Dongdaemun-Gu, Seoul, 02447, Republic of Korea
- Department of Conservative Dentistry, College of Dentistry, Kyung Hee University, 23 Kyungheedae-Ro, Dongdaemun-Gu, Seoul, 02447, Republic of Korea
| | - Soram Oh
- Department of Conservative Dentistry, Kyung Hee University Dental Hospital, 23 Kyungheedae-Ro, Dongdaemun-Gu, Seoul, 02447, Republic of Korea.
- Department of Conservative Dentistry, College of Dentistry, Kyung Hee University, 23 Kyungheedae-Ro, Dongdaemun-Gu, Seoul, 02447, Republic of Korea.
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