Mechanical preparation of root canals: shaping goals, techniques and means

Hülsmann, Michael; Peters, Ove A.; Dummer, P. M. H.

doi:10.1111/j.1601-1546.2005.00152.x

Cited by 715 publications

(801 citation statements)

References 351 publications

(531 reference statements)

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“…Generally, the high chip space of an instrument improves its debris removal capacity (15). Previous researches have shown that instruments with active cutting-edge blades had superior cleaning efficiency compared to radial lands (6,28,29). Thus, lower PT results could be explained by the presence of the convex flutes of the triangular cross-section that are not found on the PTN and R instruments ( Figure 1).…”

Section: Discussionmentioning

confidence: 99%

Influence of Root Canal Curvature on Wall Cleanliness in the Apical Third during Canal Preparation

Robberecht¹,

Dehurtevent²,

Lemaitre³

et al. 2017

Eur Endod J

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Objective: The aim of this study was to evaluate the influence of root canal curvature (curved and straight root canals), prepared using reciprocating and rotary files, on wall cleanliness during root canal treatments. Methods: Thirty curved and 30 straight human root canals were prepared using ProTaper (Dentsply), ProTaper Next (Dentsply) and Reciproc files (Dentsply) (n=20/group). The roots were split longitudinally and observed using a scanning electron microscope. Six micrographs were obtained at 1, 3 and 5 mm from the working length (WL). Two blinded observers scored the amount of debris. Mean debris scores were compared using a non-parametric the Mann-Whitney U test or Kruskal-Wallis test, and a Bonferroni correction was used for multiple comparisons. Results: Considering all the shaping systems together, the debris scores were lower in curved root canals (P<0.05). Reciproc and ProTaper Next performed better than ProTaper in straight canals (P<0.05). No difference was found between ProTaper Next and Reciproc regardless of the canal curvature or distance from the WL. Considering all the shaping systems together, cleanliness increased when pulling away from the WL. Conclusion:The anatomical configuration of the root canal influences the quality of cleaning by shaping instruments regardless of the instrument kinematics during endodontic procedures. In every circumstance, the last millimetres of the apical third remain the most difficult area to clean.

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Section: Discussionmentioning

confidence: 99%

Influence of Root Canal Curvature on Wall Cleanliness in the Apical Third during Canal Preparation

Robberecht¹,

Dehurtevent²,

Lemaitre³

et al. 2017

Eur Endod J

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“…On the one hand, these methods cannot completely remove the smear layer, preventing the penetration of chemical irrigating solutions into dentinal tubules [6,10], leading to, as a consequence, less than full elimination of nested bacteria [4,11,12]. In fact, the method is mostly limited to a dentin depth between 100 and 300 μm.…”

Section: Introductionmentioning

confidence: 99%

“…To date, several studies [6][7][8][9] have shown that bio-mechanical, also known as chemo-mechanical, methods play a significant role in the treatment of root canal systems. On the one hand, these methods cannot completely remove the smear layer, preventing the penetration of chemical irrigating solutions into dentinal tubules [6,10], leading to, as a consequence, less than full elimination of nested bacteria [4,11,12].…”

Section: Introductionmentioning

confidence: 99%

Temperature elevation during root canal treatment with a 445-nm diode laser—an in vitro study

2018

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Objective This study investigated the thermal effects of a 445-nm diode laser on tooth roots of endodontic treatment. Material and methods A total of 15 human single-rooted extracted teeth were included in the survey. Samples were sectioned at the cementoenamel junction. The root canals were instrumented using a rotary system. Each root was fitted into a resin mold and was fixed in a vertical position using clamps. All samples were placed on a support in a thermal path at 37°C. The root canals were randomly divided into three groups (n = 5 each): samples were irradiated with 0.6 W continuous wave (CW), 0.4 W CW, and 1.2 W gated mode, at a repetition rate of 10 Hz with a pulse duration of 50 ms. The time-dependent temperature elevations of the cervical, middle, and apical thirds of the roots were recorded at a sampling rate of 2 Hz during laser irradiation with a K-type thermocouple measurement system. Results The mean temperature rise inside the roots in this study was below 10°C, whereas the maximum temperature rise of 9.83°C (0.6 W CW) and 9.81°C (1.2 W gated mode, repetition rate 10 Hz, and pulse duration 50 ms) was registered in lower incisors, and 4.97°C was detected at 0.4 W CW. The thermal changes seen in the apical thirds of the root were statically significantly (p < 0.001) and were greater than those at the coronal and middle thirds. Conclusion The results of this study suggest that 445-nm diode lasers may provide a safe temperature for endodontic applications.

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“…(1988) permitiu melhoras significativas no preparo químico-cirúrgico do SCR uma vez que é possível sua utilização na instrumentação dos canais radiculares curvos com a manutenção do formato anatômico do canal e com a redução na formação de degraus ou zips e no transportes de forames (Bergmans et al, 2001;Hulsmann et al, 2005;Yoshimine et al, 2005). (Bourauel et al, 1998).…”

Section: Discussionunclassified

“…As limas de NiTi proporcionam um preparo cêntrico, com menor incidência de transporte do canal e formação de degraus, o que resulta na conservação da forma anatômica original (Bergmans et al, 2001;Hulsmann et al, 2005;Yoshimine et al, 2005).…”

Section: Instrumentos Endodônticos De Nitiunclassified

Avaliação da influência do hipoclorito de sódio na qualidade da superfície e resistência à corrosão de limas de NiTi de diferentes procedências

Franco¹

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Aos meus pais, Regina e Manoel, por acreditarem em mim e ensinarem o verdadeiro significado da palavra família. Obrigada por todo apoio, compreensão, luta, sacrifício e dificuldades que passaram para este sonho se realizasse. Serei eternamente grata! A minha adorada e querida Vó, Adelia Rocha (in memorium), pelo amor incondicional, por me ensinar com muita sabedoria que o mais importante na vida é ter coragem e nunca desanimar ou desistir diante das dificuldades e obstáculos.Muito obrigada! Aos meus irmãos, Rodrigo e Graziella, pelo apoio, amizade, conselhos, por acreditarem em mim e me ensinar todos os dias a importância da partilha e amor fraterno. Vocês são essenciais e insubstituíveis na minha vida! As minhas irmãs de coração, Carolina e Bárbara, pela amizade, confiança, carinho e presença constante em minha vida e, pelo incentivo quando o sacrifico era grande. AGRADECIMENTOS ESPECIAISA Profa. Dra. Elaine Manso Oliveira Franco de Carvalho sem dúvidas, grande incentivadora e responsável por essa conquista. Obrigada por acreditar e me ajudar! Ao Prof. Dr. José Luiz Lage-Marques pela confiança e oportunidades.Ao Prof. Dr. João Humberto Antoniazzi pela paciência, sabedoria, humildade, dedicação me ensinando o que realmente significa ser um Professor, um Orientador e principalmente um Amigo. Sinto-me muito honrada e privilegiada por ter sido sua orientada.A Profa. Dra Neusa Alonso-Falleiros ser humano admirável com condutas profissionais e pessoais exemplares. Obrigada pela convivência e ensinamentos neste período, com certeza o carinho é verdadeiro e eterno.Ao Prof. Dr. Giulio Gavini por toda atenção, compreensão e orientação.Ao Prof. Dr. Isaac Jamil Sayed pela paciência e empenho para que tudo saísse da melhor maneira buscando sempre a excelência e se preocupando com os detalhes na obtenção das imagens. Muito obrigada, sua ajuda foi fundamental! Ao Carlos, por toda dedicação, atenção e companheirismo que mesmo longe sempre esteve presente e disposto a ajudar. AGRADECIMENTOSÀ Deus por estar sempre presente na minha vida e colocar pessoas tão especiais que de alguma forma contribuíram para a conclusão deste trabalho.A amiga Eliana Souza por todos ensinamentos, amizade, conselhos e inspiração para sempre seguir adiante Ao Leonardo e Nathalia pela amizade e por todos conselhos. ABSTRACTThe present paper evaluated the influence of 1% and 2.5% sodium hypochlorite in the quality of the surface finishing and resistance to corrosion of two endodontic files: Ten from the twenty instruments were individually fixed by the handle to a copper wire tip (0.12 mm diameter and 20 cm length) and placed in the interior of an electrochemical cell with 500 mL sodium hypochlorite solution (NaCIO) 1% (Fórmula e Ação) at the environment temperature controlled in 23ºC (±2) until covering the active part of the instrument. Recordings were made with a PAR potentiostat model 273A. The test was repeated in the same pattern to the other ten files from the same commercial brand with NaClO 2.5%. Besides EPPC, the files were submitted to the s...

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Mechanical preparation of root canals: shaping goals, techniques and means

Cited by 715 publications

References 351 publications

Influence of Root Canal Curvature on Wall Cleanliness in the Apical Third during Canal Preparation

Influence of Root Canal Curvature on Wall Cleanliness in the Apical Third during Canal Preparation

Temperature elevation during root canal treatment with a 445-nm diode laser—an in vitro study

Avaliação da influência do hipoclorito de sódio na qualidade da superfície e resistência à corrosão de limas de NiTi de diferentes procedências

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