Shaping ability of four different NiTi rotary systems with tactile controlled activation technique in simulated curved canals

doi:10.3877/cma.j.issn.1674-1366.2021.01.002

Abstract

Abstract:

Objective

To evaluate the shaping ability of four NiTi rotary systems HyFlex CM (HF) , TFA, Vortex Blue (VB) and Mtwo combined with Tactile Controlled Activation (TCA) technique or traditional technique (TT) when preparing simulated curved canals.

Methods

Ninety-six simulated curved canals were assigned to four groups (n = 24 each) according to different NiTi rotary systems (HF, TFA, VB and Mtwo) using a random number table method. Each group was divided into two subgroups based on instrumentation technique (TT or TCA) (n = 12 each) . The simulated curved canals in each group were instrumented by using the corresponding rotary system and technique. Pre- and postoperative canal images were obtained using the stereoscopic microscope. AutoCAD, Adobe Photoshop CS5 and Image J were used for image processing. Eleven points were arranged in 1 mm steps from apex and numbered sequentially as D0-D10. The material removal from the inner and outer canal walls at each points were measured and canal transportation were calculated accordingly. The shaping ability of two techniques was analyzed using independent t-test. The shaping ability of four rotary systems was analyzed using One-Way ANOVA followed by Bonferroni test for a multiple comparison procedure.

Results

Compared with TT, TCA technique reduced root canal transportation caused by HF at D0-D2 points (t_D0 = 2.701, P_D0 = 0.013; t_D1 = 3.497, P_D1 = 0.002; t_D2 = 2.731, P_D2 = 0.012) , TFA at D2, D5 and D6 points (t_D2 = 2.303, P_D2 = 0.031; t_D5 = 4.500, P_D5<0.001; t_D6 = 2.102, P_D6 = 0.047) , VB at D6, D7 and D10 points (t_D6 = 3.562, P_D6 = 0.002; t_D7 = 3.589, P_D7 = 0.002; t_D10 = 3.004, P_D10 = 0.007) and Mtwo at D4-D6 and D10 points (t_D4 = 4.668, P_D4<0.001; t_D5 = 5.645, P_D5<0.001; t_D6 = 3.627, P_D6 = 0.001; t_D10 = 5.778, P_D10<0.001) . Comparing the shaping ability of four NiTi rotary systems combined with the same technique, the results showed that Mtwo produced more canal transportation at D3-D8 points than other three systems (P<0.05) ; VB produced more transportation at D6 and D7 points of TT group and at D4-D6 points of TCA group than TFA and HF (P<0.05) ; No significant difference was found between HF and TFA except D1 point of TCA group (P<0.05) .

Conclusion

Under the conditions of this study, HF, TFA, VB and Mtwo combined with TCA were demonstrated excellent shaping ability when preparing curved root canals.

Key words: Root canal preparation, Dental pulp cavity, curved, Tactile controlled activation, Shaping ability, HyFlex CM, TFA, Vortex Blue, Mtwo

Kaimi Zeng, Xi Wei, Xiangya Huang, Wancui Wu. Shaping ability of four different NiTi rotary systems with tactile controlled activation technique in simulated curved canals[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2021, 15(01): 6-12.

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Figures/Tables 5

References 24

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镍钛系统	根管预备程序
HF	25/.08预备至10.5 mm
	15/.04、20/.04、25/.04、30/.04、35/.04预备至15.5 mm
TFA	20/.04、25/.06、35/.04预备至15.5 mm
VB	15/.04、20/.04、25/.04、30/.04、35/.04预备至15.5 mm
Mtwo	10/.04、15/.05、20/.06、25/.06、30/.05、35/.04预备至15.5 mm

镍钛系统	根管预备程序
HF	25/.08预备至10.5 mm
	15/.04、20/.04、25/.04、30/.04、35/.04预备至15.5 mm
TFA	20/.04、25/.06、35/.04预备至15.5 mm
VB	15/.04、20/.04、25/.04、30/.04、35/.04预备至15.5 mm
Mtwo	10/.04、15/.05、20/.06、25/.06、30/.05、35/.04预备至15.5 mm

镍钛系统	例数	D0	D1	D2	D3	D4	D5
HF	12	0.108 ± 0.053^a	0.038 ± 0.017^a	0.033 ± 0.019^a	0.021 ± 0.024^a	0.018 ± 0.022^a	0.034 ± 0.022^a
TFA	12	0.069 ± 0.036^a	0.015 ± 0.007^b	0.020 ± 0.014^a	0.016 ± 0.012^a	0.017 ± 0.017^a	0.049 ± 0.019^ab
VB	12	0.074 ± 0.053^a	0.025 ± 0.017^ab	0.028 ± 0.019^a	0.029 ± 0.024^a	0.034 ± 0.022^a	0.081 ± 0.022^b
Mtwo	12	0.120 ± 0.072^a	0.022 ± 0.017^ab	0.030 ± 0.012^a	0.066 ± 0.037^b	0.147 ± 0.037^b	0.206 ± 0.045^c
F值		2.707	4.923	1.691	10.074	75.786	79.225
P值		0.057	0.005	0.183	<0.001	<0.001	<0.001
镍钛系统	例数	D6	D7	D8	D9	D10
HF	12	0.040 ± 0.024^a	0.034 ± 0.025^a	0.032 ± 0.014^a	0.025 ± 0.023^a	0.039 ± 0.044^a
TFA	12	0.051 ± 0.026^a	0.035 ± 0.024^a	0.022 ± 0.016^a	0.033 ± 0.023^a	0.059 ± 0.026^ab
VB	12	0.101 ± 0.024^b	0.069 ± 0.025^b	0.018 ± 0.014^a	0.036 ± 0.023^a	0.091 ± 0.044^b
Mtwo	12	0.202 ± 0.041^c	0.140 ± 0.037^c	0.069 ± 0.038^b	0.036 ± 0.031^a	0.155 ± 0.041^c
F值		72.197	36.942	11.806	0.524	23.568
P值		<0.001	<0.001	<0.001	0.668	<0.001

镍钛系统	例数	D0	D1	D2	D3	D4	D5
HF	12	0.108 ± 0.053^a	0.038 ± 0.017^a	0.033 ± 0.019^a	0.021 ± 0.024^a	0.018 ± 0.022^a	0.034 ± 0.022^a
TFA	12	0.069 ± 0.036^a	0.015 ± 0.007^b	0.020 ± 0.014^a	0.016 ± 0.012^a	0.017 ± 0.017^a	0.049 ± 0.019^ab
VB	12	0.074 ± 0.053^a	0.025 ± 0.017^ab	0.028 ± 0.019^a	0.029 ± 0.024^a	0.034 ± 0.022^a	0.081 ± 0.022^b
Mtwo	12	0.120 ± 0.072^a	0.022 ± 0.017^ab	0.030 ± 0.012^a	0.066 ± 0.037^b	0.147 ± 0.037^b	0.206 ± 0.045^c
F值		2.707	4.923	1.691	10.074	75.786	79.225
P值		0.057	0.005	0.183	<0.001	<0.001	<0.001
镍钛系统	例数	D6	D7	D8	D9	D10
HF	12	0.040 ± 0.024^a	0.034 ± 0.025^a	0.032 ± 0.014^a	0.025 ± 0.023^a	0.039 ± 0.044^a
TFA	12	0.051 ± 0.026^a	0.035 ± 0.024^a	0.022 ± 0.016^a	0.033 ± 0.023^a	0.059 ± 0.026^ab
VB	12	0.101 ± 0.024^b	0.069 ± 0.025^b	0.018 ± 0.014^a	0.036 ± 0.023^a	0.091 ± 0.044^b
Mtwo	12	0.202 ± 0.041^c	0.140 ± 0.037^c	0.069 ± 0.038^b	0.036 ± 0.031^a	0.155 ± 0.041^c
F值		72.197	36.942	11.806	0.524	23.568
P值		<0.001	<0.001	<0.001	0.668	<0.001

镍钛系统	例数	D0	D1	D2	D3	D4	D5
HF	12	0.064 ± 0.034^ab	0.017 ± 0.011^ab	0.018 ± 0.012^ab	0.017 ± 0.013^a	0.023 ± 0.020^a	0.032 ± 0.023^a
TFA	12	0.046 ± 0.026^a	0.010 ± 0.007^a	0.009 ± 0.009^a	0.009 ± 0.008^ab	0.013 ± 0.009^a	0.019 ± 0.013^a
VB	12	0.092 ± 0.038^b	0.024 ± 0.016^b	0.028 ± 0.014^b	0.028 ± 0.014^ac	0.046 ± 0.017^b	0.070 ± 0.027^b
Mtwo	12	0.090 ± 0.030^b	0.015 ± 0.011^ab	0.033 ± 0.021^b	0.056 ± 0.022^d	0.087 ± 0.024^c	0.121 ± 0.027^c
F值		5.475	3.010	6.628	21.568	38.180	46.676
P值		0.003	0.040	0.001	<0.001	<0.001	<0.001
镍钛系统	例数	D6	D7	D8	D9	D10
HF	12	0.029 ± 0.022^a	0.023 ± 0.013^a	0.025 ± 0.014^a	0.032 ± 0.029^a	0.037 ± 0.031^a
TFA	12	0.029 ± 0.023^a	0.027 ± 0.023^a	0.036 ± 0.018^a	0.048 ± 0.029^a	0.054 ± 0.034^a
VB	12	0.071 ± 0.015^b	0.036 ± 0.019^a	0.022 ± 0.016^a	0.035 ± 0.029^a	0.043 ± 0.034^a
Mtwo	12	0.146 ± 0.034^c	0.108 ± 0.042^b	0.065 ± 0.037^b	0.037 ± 0.020^a	0.054 ± 0.044^a
F值		60.236	27.175	8.585	0.799	0.615
P值		<0.001	<0.001	<0.001	0.501	0.609

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