A quantitative analysis of rotary, ultrasonic and manual techniques to treat proximally flattened root canals

Grecca, Fabiana Soares; Garcia, Roberto Brandão; Bramante, Clóvis Monteiro; Moraes, Ivaldo Gomes de; Bernardineli, Norberti

doi:10.1590/s1678-77572007000200003

Cited by 15 publications

(14 citation statements)

References 11 publications

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“…(13)(14)(15)(16) Flattened or oval canals studies use the mesial root of molars (17,18) or mandibular incisors. (5,10,19,20) Extracted mandibular incisors were used in this study by having a pronounced flattening on the mesiodistal direction, which can generate a second canal lingually located to the main one, as well as the occurrence of severely flattened canals, with elongated cross-section, being the biggest diameter on the buco-lingual direction. (13) Mandibular incisors with more than one root canal were excluded and only the ones with mesiodistal flattening were used.…”

Section: Discussionmentioning

confidence: 99%

“…Grecca et al (10) evaluated rotary, hand file and ultrasonic instrumentation techniques in flattened canals. After statiscal analysis, the authors concluded that there was no siginificant diference among the groups and that none of them had completely removed the dyed areas.…”

Section: Discussionmentioning

confidence: 99%

“…The preparation of curved and flatenned root canals is more complex once the instrument suffers stresses and strains imposed by the procedure, which may ultimately influence root canal treatment outcome. (10) According to Wu et al (11) flattened root canals buccal and lingual walls are areas of difficult access to instrumentation. Barbizam et al (12) observed by optical microscopy analysis in flattend root canals that the instruments do not contact polar areas during instrumentation.…”

Section: Introductionmentioning

confidence: 99%

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Análise Da Capacidade De Limpeza De Três Técnicas De Instrumentação Em Canais Radiculares Achatados: Diaphanization Study

Souza¹,

Gonçalves²,

Rasquin³

et al. 2015

RevBahianaOdonto

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The purpose of this study was to evaluate by diaphanization the cleaning ability of walls of flattened root canals prepared with three different instruments. Thirty lower incisors, which had their root canals filled with India ink after coronal access and determination of the work length, were selected. The samples were randomly divided into three groups of 10 teeth each, according to the instrument used in the preparation: Group 1 -hand files instrumentation; Group 2 -instrumentation with ProTaper Universal rotary files; Group 3 -instrumentation with iRace rotary files. After instrumentation, the teeth were diaphanized and evaluated by cleaning ability, analyzing the amount of dentin walls in which India ink was not removed. When performing the Kruskal-Wallis test (p>0.05) there were not statistical significant differences between the groups, as the arithmetic average of the scores at cervical, middle and apical thirds. None of the instruments used in root canal preparation of flattened root canals was able to perform a complete cleaning of the dentin walls.Keywords: Root Canal Preparation; Dental Pulp Cavity; Endodontics. ResumoO objetivo desse estudo foi avaliar utilizando a diafanização, a capacidade de limpeza das paredes de canais radiculares achatados preparados com três diferentes instrumentos. Foram selecionados 30 incisivos inferiores que após abertura coronária e odontometria tiveram os canais preenchidos com tinta nanquim, em seguida foram divididos aleatoriamente em três grupos de 10 dentes cada, de acordo com o instrumento utilizado no preparo: Grupo 1 -instrumentação com limas manuais; Grupo 2 -instrumentação com limas rotatórias ProTaper Universal; Grupo 3 -instrumentação com limas rotatórias iRace. Após a instrumentação, os dentes foram diafanizados e avaliados quanto a capacidade de limpeza, analisando-se a quantidade de paredes dentinárias em que a tinta nanquim não foi removida. Ao se realizar o teste de Kruskal Wallis (p>0,05) não foram observadas diferenças estatisticamente significantes entre os grupos, quanto a média aritmética dos escores nos terços cervical, médio e apical. Nenhum dos instrumentos utilizados no preparo biomecânico de canais radiculares achatados foi capaz de realizar uma completa limpeza das paredes dentinárias.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Análise Da Capacidade De Limpeza De Três Técnicas De Instrumentação Em Canais Radiculares Achatados: Diaphanization Study

Souza¹,

Gonçalves²,

Rasquin³

et al. 2015

RevBahianaOdonto

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“…Previous studies emphasized that about 35% (or more) of root canal surface is not prepared, even when a NiTi rotary system is used (15). Greca et al (16) evaluated different preparation techniques and observed than none was efficient regarding the action on root canal dentin walls. In the study of Zand et al (8), RaCe system also did not reach all areas and remove debris from all root canal regions.…”

Section: Discussionmentioning

confidence: 99%

Performance of RaCe Instrumentation System in Curved Root Canals: A Comprehensive Analysis by Three Study Methods

et al. 2013

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In this study, curved maxillary molar root canals were instrumented with RaCe rotary system to evaluate: 1. the occurrence of canal transportation using a radiographic platform; 2. the action of the instruments on the dentin walls, centering ability and canal enlargement by analysis of digital images; and the percentage of regular dentin surfaces and debris within the canal by histological analysis. Ten mesiobuccal roots of extracted human maxillary molars were embedded in acrylic resin and sectioned at the middle and apical thirds. Root canal shaping was performed using the RaCe rotary system at 250 rpm and 1 Ncm torque. Each instrument set was used five times according to a crowndown technique in the following sequence: 40/0.10, 35/0.08, 25/0.06, 25/0.04, 25/0.02 (working length -WL), 30/0.02 (WL) and 35/0.02 (WL). Each instrument was inserted until resistance was felt and then pulled back, followed by brushing movements towards all canal walls. Each specimen was assessed by three study methods: radiographic platform, digitized image assessment and histological analysis. The radiographic platform showed lack of apical transportation. No statistically significant difference (Wilcoxon test, p>0.05) was found between the middle and apical thirds regarding instrument action on dentin walls, centering ability, area of root canal enlargement, percentage of regular dentin surfaces and debris within the root canal. It may be concluded that RaCe system is a suitable method for the preparation of curved root canals, regarding the maintenance of root canal original path, action on dentin walls, canal enlargement and removal of debris from the root canal lumen.

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“…preparation of the root canals plays an important role in endodontic treatment, as the main objectives of the latter are to clean, disinfect and shape the root canals to enable easy and appropriate filling (1,2) .…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Time Needed for Instrumentation of Simulated Curved Canals by Using Different Files

Al-Ani¹

2016

Iraqi dent. j.

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A quantitative analysis of rotary, ultrasonic and manual techniques to treat proximally flattened root canals

Cited by 15 publications

References 11 publications

Análise Da Capacidade De Limpeza De Três Técnicas De Instrumentação Em Canais Radiculares Achatados: Diaphanization Study

Análise Da Capacidade De Limpeza De Três Técnicas De Instrumentação Em Canais Radiculares Achatados: Diaphanization Study

Performance of RaCe Instrumentation System in Curved Root Canals: A Comprehensive Analysis by Three Study Methods

A Comparison of Time Needed for Instrumentation of Simulated Curved Canals by Using Different Files

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