Comparative study of two novel nickel-titanium instruments for root canal preparation in curved canals on shaping ability and microcrack formation

doi:10.19439/j.sjos.2023.03.001

Abstract

Abstract: PURPOSE: To evaluate the shaping ability and microcrack formation of ProTaper Next (PTN) and XP-endo Shaper (XPS) systems in the mesial curved root canals of mandibular molars by using micro-CT scans. METHODS: Sixteen mandibular molars with two independent mesial root canals and curvature ranging from 25° to 35° were randomly divided into two groups. The preparation time was recorded. Pre-and-postoperative images were scanned by micro-CT. The following parameters were evaluated: canal transportation, centering ratio, changes in canal volume, canal/root width ratio and microcrack formation. SPSS 22.0 software package was used to analyze the data. RESULTS: Significant difference (P <0.05) was found for canal transportation at the section of 1, 3, 5, 7 mm from the apical foramen and centering ratio at the section of 1, 3, 7 mm from the apical foramen, where XPS files were superior. There was no significant difference for centering ratio at the section of 5 mm from the apical foramen(P>0.05). XPS groups significantly consumed less time during the preparation(P<0.05). There was no significant difference between the two groups for the increase amount of volume, and canal/root width ratio(P>0.05). Both instruments did not induce new microcrack after preparation. CONCLUSIONS: PTN and XPS can both shape curved canals effectively and safely. XPS showed better centering ability and reduced preparation time during preparation.

Key words: New thermo-mechanical nickel-titanium instrument, Curved canal, Root canal preparation, Shaping ability, Microcrack

CLC Number:

R781.3

FENG Fei, CAO Li-qun, ZHANG Qi. Comparative study of two novel nickel-titanium instruments for root canal preparation in curved canals on shaping ability and microcrack formation[J]. Shanghai Journal of Stomatology, 2023, 32(3): 225-229.

References

[1] Kyaw Moe MM, Ha JH, Jin MU, et al.Root canal shaping effect of instruments with offset mass of rotation in the mandibular first molar: a micro-computed tomographic study[J]. J Endod, 2018, 44(5): 822-827.
[2] Wu H, Peng C, Bai Y, et al.Shaping ability of ProTaper Universal, WaveOne and ProTaper Next in simulated L-shaped and S-shaped root canals[J]. BMC Oral Health, 2015, 15(1): 27-33.
[3] De-Deus G, Belladonna FG, Souza EM, et al.Micro-computed tomographic assessment on the effect of ProTaper Next and twisted file adaptive systems on dentinal cracks[J]. J Endod, 2015, 41(7): 1116-1119.
[4] Li SH, Lu Y, Song D, et al.Occurrence of dentinal microcracks in severely curved root canals with ProTaper Universal, WaveOne, and ProTaper Next file systems[J]. J Endod, 2015, 41(11): 1875-1879.
[5] Duque JA, Vivan RR, Cavenago BC, et al.Influence of NiTi alloy on the root canal shaping capabilities of the ProTaper Universal and ProTaper gold rotary instrument systems[J]. J Appl Oral Sci, 2017, 25(1): 27-33.
[6] Sant'Anna Júnior A, Cavenago BC, Ordinola-Zapata R, et al. The effect of larger apical preparations in the danger zone of lower molars prepared using the Mtwo and reciproc systems[J]. J Endod, 2014, 40(11): 1855-1859.
[7] de Carvalho KKT, Petean IBF, Silva-Sousa AC, et al. Impact of several NiTi-thermally treated instrumentation systems on biomechanical preparation of curved root canals in extracted mandibular molars[J]. Int Endod J, 2022, 55(1): 124-136.
[8] Ruddle C, Machtou P, West J. The shaping movement: fifth-generation technology[J]. Dent Today, 2013, 32(4):94, 96-99.
[9] Azim AA, Piasecki L, Da Silva Neto UX, et al. XP shaper, a novel adaptive core rotary instrument: micro-computed tomographic analysis of its shaping abilities[J]. J Endod, 2017, 43(9): 1532-1538.
[10] Versiani MA, Carvalho KKT, Mazzi-Chaves JF, et al.Micro-computed tomographic evaluation of the shaping ability of XP-endo shaper, irace, and edgefile systems in long oval-shaped canals[J]. J Endod, 2018, 44(3): 489-495.
[11] Sabeti M, Kazem M, Dianat O, et al.Impact of access cavity design and root canal taper on fracture resistance of endodontically treated teeth: an ex vivo investigation[J]. J Endod, 2018, 44(9): 1402-1406.
[12] Miguéns-Vila R, Martín-Biedma B, De-Deus G, et al.Micro-computed tomographic evaluation of dentinal microcracks after preparation of curved root canals with ProTaper gold, WaveOne gold, and ProTaper Next instruments[J]. J Endod, 2021, 47(2): 309-314.
[13] Rödig T, Krämer J, Müller C, et al.Incidence of microcracks after preparation of straight and curved root canals with three different niti instrumentation techniques assessed by micro-CT[J]. Aust Endod J, 2019, 45(3): 394-399.
[14] Cassimiro M, Romeiro K, Gominho L, et al.Effects of reciproc, ProTaper Next and WaveOne gold on root canal walls: a stereomicroscope analysis[J]. Iran Endod J, 2018, 13(2): 228-233.
[15] Aksoy Ç, Keris EY, Yaman SD, et al.Evaluation of XP-endo shaper, reciproc blue, and ProTaper Universal NiTi systems on dentinal microcrack formation using micro-computed tomography[J]. J Endod, 2019, 45(3): 338-342.
[16] Ugur Aydin Z, Keskin NB, Özyürek T.Effect of reciproc blue, XP-endo shaper, and WaveOne gold instruments on dentinal microcrack formation: a micro-computed tomographic evaluation[J]. Microsc Res Tech, 2019, 82(6): 856-860.
[17] Alkahtany SM, Al-Madi EM.Dentinal microcrack formation after root canal instrumentation by XP-endo shaper and ProTaper Universal: a microcomputed tomography evaluation[J]. Int J Dent, 2020: 4030194.
[18] Stringheta CP, Pelegrine RA, Kato AS, et al.Micro-computed tomography versus the cross-sectioning method to evaluate dentin defects induced by different mechanized instrumentation techniques[J]. J Endod, 2017, 43(12): 2102-2107.
[19] Vieira MLO, Dantas HV, De Sousa FB, et al.Morphologic changes of apical foramen and microcrack formation after foraminal enlargement: a scanning electron microscopic and micro-computed tomographic analysis[J]. J Endod, 2020, 46(11): 1726-1732.
[20] Martins J, Oliveira BP, Duarte DA, et al.Micro-computed tomographic assessment of dentinal microcrack formation in straight and curved root canals in extracted teeth prepared with hand, rotary and reciprocating instruments[J]. Int Endod J, 2021, 54(8): 1362-1368.
[21] Karatas E, Gündüz HA, Kirici DÖ, et al.Incidence of dentinal cracks after root canal preparation with ProTaper gold, profile vortex, f360, reciproc and ProTaper Universal instruments[J]. Int Endod J, 2016, 49(9): 905-910.
[22] 汤玉红, 徐睿, 朱倩, 等. 3种镍钛器械预备重度弯曲根管后牙本质微裂纹的观察[J]. 上海口腔医学, 2019, 28(6): 581-585.
[23] Wilcox LR, Roskelley C, Sutton T.The relationship of root canal enlargement to finger-spreader induced vertical root fracture[J]. J Endod, 1997, 23(8): 533-534.
[24] Santos-Filho PCF, Veríssimo C, Raposo LHA, et al.Influence of ferrule, post system, and length on stress distribution of weakened root-filled teeth[J]. J Endod, 2014, 40(11): 1874-1878.