A l2-month longitudinal in vitro leakage study on a new silicon-based root canal filling material (Gutta-Flow)

2007 ◽  
Vol 103 (6) ◽  
pp. 854-859 ◽  
Author(s):  
Evangelos G. Kontakiotis ◽  
Giorgos N. Tzanetakis ◽  
Alexios L. Loizides
Keyword(s):  
Root Canal ◽  
Filling Material ◽  
Root Canal Filling ◽  
Silicon Based

scholarly journals Impacts of contracted endodontic cavities compared to traditional endodontic cavities in premolars

2020 ◽  
Author(s):  
Xia Juan ◽  
Wang weidong ◽  
Li Zhengmao ◽  
Lin Bingpeng ◽  
Zhang Qian ◽  
...  
Keyword(s):  
Root Canal ◽  
Fracture Resistance ◽  
Testing Machine ◽  
Filling Material ◽  
Root Canal Filling ◽  
Surface Areas ◽  
Significant Difference ◽  
3D Printed ◽  
Post Hoc

Abstract Background: This study aims to compare the percentage of dentin removed, instrumentation efficacy, root canal filling and load at fracture between contracted endodontic cavities, and traditional endodontic cavities on root canal therapy in premolars. Methods: Forty extracted intact human first premolars were imaged with micro-CT and randomly assigned to the contracted endodontic cavity (CEC) or traditional endodontic cavity (TEC) groups. CEC was prepared with the aid of a 3D-printed template, canals were prepared with a 0.04 taper M-Two rotary instrument, and cavities were restored with resin. Specimens were loaded to fracture in an Instron Universal Testing Machine after a fatigue phase. The data were analyzed by the independent samples T test and Mann-Whitney U test, appropriate post hoc tests. Results: In the premolars tested in vitro, the percentage of dentin removed in the premolars with two dental roots in the CEC group (3.85% ± 0.42%) was significantly smaller (P < 0.05) than in the TEC group (4.94% ± 0.5%). The untouched canal wall (UCW) after instrumentation for TECs (16.43% ± 6.56%) was significantly lower (P< .05) than the UCW (24.42% ± 9.19%) for CECs in single-rooted premolars. No significant differences were observed in the increased canal volume and surface areas in premolars between the TEC and CEC groups (P > 0.05). CECs conserved coronal dentin in premolars with two dental roots but no impact on the instrument efficacy. There were no differences between the CEC groups and the TEC groups in the percentage of filling material and voids (P > 0.05). In addition, the mean load at failure of premolars did not significantly differ between the CEC and TEC groups and there was no significant difference in the type of fracture (P > 0.05). Conclusion: The results of this study suggest that CEC could not improve the fracture resistance of the endodontically treated premolars. The instrumentation efficacy and the percentage of filling material did not significantly differ between CECs and TECs in premolars. Keywords: 3D-printed template, contracted endodontic cavities, instrumentation efficacy, root canal filling, fracture resistance

scholarly journals Impacts of contracted endodontic cavities compared to traditional endodontic cavities in premolars

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Juan Xia ◽  
Weidong Wang ◽  
Zhengmao Li ◽  
Bingpeng Lin ◽  
Qian Zhang ◽  
...  
Keyword(s):  
Root Canal ◽  
Testing Machine ◽  
Filling Material ◽  
Root Canal Filling ◽  
Surface Areas ◽  
Significant Difference ◽  
3D Printed ◽  
Post Hoc ◽  
Rotary Instrument

Abstract Background This study aims to compare the percentage of dentin removed, instrumentation efficacy, root canal filling and load at fracture between contracted endodontic cavities, and traditional endodontic cavities on root canal therapy in premolars. Methods Forty extracted intact human first premolars were imaged with micro-CT and randomly assigned to the contracted endodontic cavity (CEC) or traditional endodontic cavity (TEC) groups. CEC was prepared with the aid of a 3D-printed template, canals were prepared with a 0.04 taper M-Two rotary instrument, and cavities were restored with resin. Specimens were loaded to fracture in an Instron Universal Testing Machine after a fatigue phase. The data were analyzed by the independent samples T test and Mann-Whitney U test, appropriate post hoc tests. Results In the premolars tested in vitro, the percentage of dentin removed in the premolars with two dental roots in the CEC group (3.85% ± 0.42%) was significantly smaller (P < 0.05) than in the TEC group (4.94% ± 0.5%). The untouched canal wall (UCW) after instrumentation for TECs (16.43% ± 6.56%) was significantly lower (P < .05) than the UCW (24.42% ± 9.19%) for CECs in single-rooted premolars. No significant differences were observed in the increased canal volume and surface areas in premolars between the TEC and CEC groups (P > 0.05). CECs conserved coronal dentin in premolars with two dental roots but no impact on the instrument efficacy. There were no differences between the CEC groups and the TEC groups in the percentage of filling material and voids (P > 0.05). In addition, the mean load at failure of premolars did not significantly differ between the CEC and TEC groups and there was no significant difference in the type of fracture (P > 0.05). Conclusion The results of this study suggest that CEC could not improve the fracture resistance of the endodontically treated premolars. The instrumentation efficacy and the percentage of filling material did not significantly differ between CECs and TECs in premolars.

scholarly journals A Silk Fibroin Based Hydration Accelerator for Root Canal Filling Materials

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 994
Author(s):  
Ching-Shuan Huang ◽  
Sung-Chih Hsieh ◽  
Nai-Chia Teng ◽  
Wei-Fang Lee ◽  
Poonam Negi ◽  
...  
Keyword(s):  
Cell Viability ◽  
Silk Fibroin ◽  
Root Canal ◽  
Setting Time ◽  
Testing Machine ◽  
Mineral Trioxide Aggregate ◽  
Filling Material ◽  
Root Canal Filling ◽  
Initial Setting Time

Mineral trioxide aggregate (MTA) is widely used in various dental endodontic applications such as root-end filling, furcal perforation repair, and vital pulp therapy. In spite of many attempts to improve handling properties and reduce the discoloration of MTA, the ideal root canal filling material has yet to be fully developed. The objective of this study was to investigate the setting time, mechanical properties, and biocompatibility of MTA set by a silk fibroin solution. A 5 wt% silk fibroin (SF) solution (a novel hydration accelerant) was used to set SavDen® MTA and ProRoot® white MTA (WMTA). Changes in setting time, diametral tensile strength (DTS), material crystallization, in vitro cell viability, and cell morphology were assessed by Vicat needle measurement, a universal testing machine, scanning electron microscopy (SEM), and WST-1 assay, respectively. The initial setting time of ProRoot® MTA and SavDen® MTA experienced a drastic decrease of 83.9% and 42.1% when deionized water was replaced by 5 wt% SF solution as the liquid phase. The DTS of SavDen® MTA showed a significant increase after set by the SF solution in 24 h. A human osteoblast-like cell (MG-63)-based WST-1 assay revealed that both ProRoot® MTA and SavDen® MTA hydrated using SF solution did not significantly differ (p > 0.05) in cell viability. MG-63 cells with pseudopodia attachments and nuclear protrusions represent a healthier and more adherent status on the surface of MTA when set with SF solution. The results suggest that the 5 wt% SF solution may be used as an alternative hydration accelerant for MTA in endodontic applications.

scholarly journals Impacts of conservative endodontic cavities on root canal therapy compare to traditional endodontic cavities in premolars

2019 ◽  
Author(s):  
Xia Juan ◽  
Wang weidong ◽  
Li Zhengmao ◽  
Lin Bingpeng ◽  
Zhang Qian ◽  
...  
Keyword(s):  
Root Canal ◽  
Testing Machine ◽  
Filling Material ◽  
Root Canal Therapy ◽  
Root Canal Filling ◽  
Biomechanical Responses ◽  
3D Printed ◽  
Post Hoc ◽  
Rotary Instrument

Abstract Background: This study aims to compare the percentage of dentin removed, instrumentation efficacy, root canal filling and load at fracture between contracted endodontic cavities and traditional endodontic cavities in premolars. Methods: Forty extracted intact human first premolars were imaged with micro-CT and randomly assigned to CEC or TEC groups. Minimal CECs were prepared with the aid of 3D-printed guide template, canals were prepared with a 0.04 taper M-Two rotary instrument and cavities were restored with resin. The specimens were loaded to fracture in an Instron Universal Testing Machine after a fatigue phase. The data were analyzed by the independent samples T test and Mann-Whitney U test, appropriate post hoc tests. Results: In the premolars tested in vitro, CECs conserved coronal dentin in premolars with two dental roots but no impact on the instrument efficacy, the root canal filling or the biomechanical responses compared with TECs. Conclusion: The results of this study did not suggest that CEC could improve the fracture resistance of the endodontically treated premolars. The instrumentation efficacy and the percentage of filling material did not significantly differ between CECs and TECs in the premolars.

scholarly journals Reintervenção endodôntica e clareamento endógeno de dentes anteriores escurecidos: relato de caso

2020 ◽  
Vol 9 (2) ◽  
Author(s):  
Marcos Sousa Rocha ◽  
Talita Fernanda Carneiro da Cunha ◽  
Naildo Aguiar Cordeiro ◽  
Tiago Silva Da Fonseca
Keyword(s):  
Root Canal ◽  
Comparative Evaluation ◽  
Case Series ◽  
In Vitro Study ◽  
Endodontic Treatment ◽  
Vitro Study ◽  
Filling Material ◽  
Root Canal Filling ◽  
Peroxide Bleaching

O tratamento endodôntico permite a permanência de dentes na cavidade oral. No entanto, procedimentos inadequados podem ocasionar o escurecimento dentário, acometendo a estética do sorriso e levando à baixa autoestima do paciente. O objetivo do presente estudo é relatar um caso clínico de retratamento endodôntico não cirúrgico, seguido de clareamento endógeno em dentes anteriores escurecidos para reabilitar os elementos tanto funcional quanto esteticamente. Paciente do gênero feminino, 25 anos, compareceu à clínica de Odontologia de uma Universidade relatando insatisfação com seu sorriso. A queixa principal se fundamentava na baixa autoestima em decorrência do escurecimento dos incisivos central e lateral superiores esquerdos após tratamento endodôntico realizado oito meses antes. Ambos os dentes estavam assintomáticos, mas clinicamente exibiam exposição de guta-percha sem selamento coronário. Radiograficamente o elemento 21 apresentava sobre-extensão de material obturador. A conduta adotada foi a reintervenção endodôntica dos elementos 21 e 22 com sepultamento do fragmento de guta-percha extrarradicular e posterior clareamento dentário interno, além de restaurações em ambos os elementos. O retratamento endodôntico não cirúrgico e o clareamento endógeno foram eficazes para a resolução do caso, pois possibilitaram a manutenção dos elementos dentários em função na cavidade oral e o restabelecimento da estética do sorriso, garantindo satisfação da paciente.Descritores: Endodontia; Retratamento; Clareamento Dental.ReferênciasTorabinejad M, White SN. Endodontic treatment options after unsuccessful initial root canal treatment: alternatives to single-tooth implants. J Am Dent Assoc. 2016;147(3):214-20.Mautone EP, Oliveira EPM, Bonatto SVS, Melo TAF, Queiroz MLP. Desobturação e repreparo do canal radicular: análise da eficácia de duas técnicas preconizadas. Rev Odontol Bras Central. 2014;23(64):58-64.Mozardo DSB, Hussne RP, Nishiyama CK, Bodanezi A, Câmara AS. Efetividade de um sistema rotatório para retratamento na remoção da obturação de canais radiculares. Rev Assoc Paul Cir Dent. 2014;68(3):202-7.Garcia JLO, Ramirez EC, Diego VD, López IRC, Rojas AR. Eficacia del sistema Protaper retratamiento en combinación con limas Hedstroem en conductos radiculares obturados con tres técnicas diferentes. Rev Endod Actual. 2013;8(2):4-11.Soares YSP, Azevedo SV. Retratamento endodôntico: possíveis causas do insucesso. Rev Cient In FOC. 2016;1(1):111-12.Zimmerli B, Jeger F, Lussi A. Bleaching of nonvital teeth: a clinically relevant literature review. Schweiz Monatsschr Zahnmed. 2010;  120(4):306-20.Schwendler A, Melara R, Erhardt MCG, Rolla JN, Souza FHC. Clareamento de dentes tratados endodonticamente: uma revisão da literatura. Rev Fac Odontol Porto Alegre. 2013;54(1/3):24-30.Moretti LCT, Silva JRA, Prado RM, Fernandes KGC, Boer NCP, Simonato LE et al. Clareamento de dentes despolpados: relato de caso clínico.  Arch Health Invest. 2017;6(5):213-17.Greenwall-Cohen J, Greenwall LH. The single discoloured tooth: vital and non-vital bleaching techniques. Br Dent J. 2019;226(11):839-49.Kaled GH, Faria MIA, Heck AR, Aragão EM, Morais SH, de Souza RC. Retratamento endodôntico: análise comparativa da efetividade da remoção da obturação dos canais radiculares realizada por três métodos. RGO Rev gauch odontol. 2011;59(1):103-8.Rocha MP, Silva RV, Silva LRM, Rocha TCM, Brito AM, Pereira RP. Retratamento endodôntico não cirúrgico: relato de caso. Rev Odontol Univ Cid São Paulo. 2016;28(3):270-76.Chandrasekar C, Ebenezer AVR, Kumar M, Sivakumar A. A comparative evaluation of gutta percha removal and extrusion of apical debris by rotary and hand files. J Clin Diagn Res. 2014;8(11):ZC110-14.Kasam S, Mariswamy AB. Efficacy of different methods for removing root canal filling material in retreatment: an in-vitro study. J Clin Diagn Res. 2016;10(6):ZC6-10.Ozyurek T, Tek V, Yilmaz K, Uslu G. Incidence of apical crack formation and propagation during removal of root canal filling materials with different engine driven nickel- titanium instruments. Restor Dent Endod. 2017;42(4):332-41.Rubino GA, Candeiro GTM, Freire LG, Iglecias EF, Lemos EM, Caldeira Cl, et al. Micro-CT evalution of guta-percha removal by two retreatment systems. Iran Endod J. 2018; 13(2):221-27.Kesim B, Ustun Y, Aslan T, Topçuoglu HS, Sahin S, Ulusan O. Efficacy of manual and mechanical instrumentation techniques for removal of overextended root canal filling material. Niger J Clin Pract. 2017;20(6):761-66.Lucena MTL, Mantovani M, Fracalossi C, Silva GR. Clareamento interno em dentes desvitalizados com a técnica walking bleach: relato de caso. Uningá Review. 2015;24(1):33-9.Ricucci D, Russo J, Rutberg M, Burleson JA, Spangberg LSW. A prospective cohort study of endodontic treatments of 1,369 root canals: results after 5 years. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2011;112(6):825-42.Gomes AC, Nejaim Y, Silva AIV, Neto FH, Cobenca N, Zaia AA et al. Influence of endodontic treatment and coronal restoration on status of periapical tissues: a cone-beam computed tomographic study. J Endod. 2015;41(10):1614-18.Plotino G, Buono L, Grande NM, Pameijer CH, Somma F. Nonvital tooth bleaching: a review of the literature and clinical procedures. J Endod. 2008;34(4):394-407.Abbott P, Heah SYS. Internal bleaching of teeth: an analysis of 255 teeth. Aust Dent J. 2009; 54(4):326-33.Badole GP, Warhadpande MM, Bahadure RN, Badole SG. Aesthetic rehabilitation of discoloured nonvital anterior tooth with carbamide peroxide bleaching: case series. J Clin Diagn Res. 2013; 7(12):3073-76.Madhu KS, Hegde S, Mathew S, Lata DA, Bhandi SH, Shruthi N. Comparison of radicular peroxide leakage from four commonly used bleaching agents following intracoronal bleaching in endodontically treated teeth: an in vitro study. J Int Oral Health. 2013;5(4):49-55.Mittal R, Sood AG, Singla MG, Dhawan D. A comparative evaluation of efficacy of commercially available bleaching agents in non-vital teeth: an in vitro study. Saudi Endod J. 2015; 5(1):33-7.Moraru I, Taculinã M, Bãtãiosu M, Gheorghitã L, Diaconu O. Whitening non vital teeth: a case report. Curr Health Sci J. 2012;38(3):132-35.Souza CR, Augusto CR, Aquino EP, Alves JC, Pires RP, Venâncio GN. Reabilitação estética de dente anterior escurecido: relato de caso. Arch Health Invest. 2017;6(8):377-81.

scholarly journals A Novel Sol-Gel Bi2-xHfxO3+x/2 Radiopacifier for Mineral Trioxide Aggregates (MTA) as Dental Filling Materials

2021 ◽  
Vol 11 (16) ◽  
pp. 7292
Author(s):  
Tzu-Sen Yang ◽  
May-Show Chen ◽  
Cheng-Jyun Huang ◽  
Chin-Yi Chen ◽  
Agnese Brangule ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Cell Viability ◽  
Root Canal ◽  
Sol Gel ◽  
Mineral Trioxide Aggregate ◽  
Filling Material ◽  
Root Canal Filling ◽  
Calcination Temperatures ◽  
Filling Materials

Mineral trioxide aggregate (MTA) is well known as an effective root canal filling material for endodontics therapy. Within MTA, bismuth oxide (Bi2O3) serving as the radiopacifier still has biocompatibility concerns due to its mild cytotoxicity. In the present study, we tried to modify the Bi2O3 radiopacifier by doping hafnium ions via the sol-gel process and investigated the effects of different doping ratios (Bi2-xHfxO3+x/2, x = 0–0.3) and calcination temperatures (400–800 °C). We mixed various precursor mixtures of bismuth nitrate (Bi(NO3)3·5H2O) and hafnium sulfate (Hf(SO4)2) and controlled the calcination temperatures. The as-prepared Hf-doped Bi2O3 radiopacifier powders were investigated by thermogravimetric analysis (TGA), X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). Portland cement/radiopacifier/calcium sulfate (75/20/5) were mixed and set by deionized water (powder to water ratio = 3:1). Changes in radiopacity, diametral tensile strength (DTS), and in vitro cell viability of the hydrated MTA-like cement were carried out. The experimental results showed that the group containing radiopacifier from sol-gelled Bi/Hf (90/10) exhibited significantly higher radiopacity (6.36 ± 0.34 mmAl), DTS (2.54 ± 0.29 MPa), and cell viability (84.0±8.1%) (p < 0.05) when compared to that of Bi/Hf (100/0) powders. It is suggested that the formation of β-Bi7.78Hf0.22O12.11 phase with hafnium addition and calcining at 700 °C can prepare novel bismuth/hafnium composite powder that can be used as an alternative radiopacifier for root canal filling materials.

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