[1] Shirrmeister JF, Wrbas KT, Schneider FH, et al. Effectiveness of a hand file and three nickel-titanium rotary instruments for removing gutta-percha in curved root canals during retreatment [J]. Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 2006, 101(5): 542-547. [2] Schneider SW. A comparison of canal preparations in straight and curved root canals[J]. Oral Surg Oral Med Oral Pathol, 1971, 32(2): 271-275. [3] 谭青松, 陶小玲, 彭彬. 镍钛再治疗器械去根管充填材料后的器械损伤评价[J]. 牙体牙髓牙周病学杂志, 2014, 24(6): 346-349. [4] Silva EJ, Sá L, Belladonna FG, et al. Reciprocating versus rotary systems for root filling removal: assessment of the apically extruded material [J]. J Endod, 2014, 40(12): 2077-2080. [5] Betti LV, Bramante CM. Quantec SC rotary instruments versus hand files for gutta-percha removal in root canal retreatment [J]. Int Endod J, 2001, 34(7): 514-519. [6] Nicopoulou-Karayianni K, Brägger U, Bürgin W, et al. Diagnosis of alveolar bone changes with digital subtraction images and conventional radiographs. An in vitro study [J]. Oral Surg Oral Med Oral Pathol, 1991, 72(2): 251-256. [7] Rahnama M. Bone mineral content of the mandible and spine in ovariectomized rats with estrogen deficiency [J]. Ann Univ Mariae Curie Sklodowska Med, 2004, 59(2): 543-546. [8] Sae-Lim V, Rajamanickam I, Lim BK, et al. Effectiveness of ProFile.04 taper rotary instruments in endodontic retreatment [J]. Endod J, 2000, 26(2): 100-104. [9] Roggendorf MJ, Legner M, Ebert J, et al. Micro-CT evaluation of residual material in canals filled with Activ GP or GuttaFlow following removal with NiTi instruments [J]. Int Endod J, 2010, 43(3): 200-209. [10] Marques da Silva B, Baratto-Filho F, Leonardi DP, et al. Effectiveness of ProTaper, D-RaCe, and Mtwo retreatment files with and without supplementary instruments in the removal of root canal filling material [J]. Int Endod J, 2012, 45(10): 927-932. [11] de Carvalho Maciel AC, Zaccaro Scelza MF. Efficacy of automated versus hand instrumentation during root canal retreatment: an ex vivo study [J]. Int Endod J, 2006, 39(10): 779-784. [12] Somma F, Cammarota G, Plofino G, et al. The effectiveness of manual and mechanical instrumentation for the retreatment of three different root canal filling materials[J]. J Endod, 2008, 34(4): 469-499. [13] Schirrmeister JF, Strohl C, Altenburger MJ, et al. Shaping ability and safety of five different rotary nickel-titanium instruments compared with stainless steel hand instrumentation in simulated curved root canals [J]. Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 2006, 101(6): 807-813. [14] Kfir A, Tsesis I, Yakirevich E, et al. The efficacy of five techniques for removing root filling material: microscopic versus radiographic evaluation [J]. Inter Endod J, 2012, 45(1): 35-41. [15] de Mello junior JE, Cunha RS, Bueno CE, et al. Retreatment efficacy of gutta-percha removal using a clinical microscope and ultrasonic instruments: part I-an ex vivo study [J]. Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 2009, 108(1): e59-62. [16] Kosti E, Lambrianidis T, Economides N, et al. Ex vivo study of the efficacy of H-files and rotary Ni-Ti instruments to remove gutta-percha and four types of sealer[J] . Int Endod J, 2006, 39(1): 48-54. [17] Tasdemir T, Er k, Yildirim T, et al. Efficacy of three rotary NiTi instruments in removing gutta-percha from root canals [J]. Int Endod J, 2008, 41(3):191-196. |