The effect of four preparation techniques on the amount of apically extruded debris

Fairbourn, Dennis R.; McWalter, George M.; Montgomery, Steve

doi:10.1016/s0099-2399(87)80174-7

Cited by 122 publications

(108 citation statements)

References 33 publications

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“…17,20 In previous studies, different techniques were used to measure the apically extruded debris and irrigant. 14,21,22 In the current study, the generally accepted method of Myers and Montgomery, 14 which is more standardized and repeatable than other methods, 11,12 was used to collect the intracanal materials.…”

Section: Discussionmentioning

confidence: 99%

Assessment of apically extruded debris and irrigant produced by different nickel-titanium instrument systems

et al. 2014

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The aim of this study was to evaluate the preparation time and the amounts of apically extruded debris and irrigant using different nickeltitanium instrumentation systems. Forty-five extracted single-rooted mandibular premolar teeth were selected and divided into three groups. The root canals were instrumented according to the manufacturers' instructions, using a reciprocating single-file system, a single-file rotary system and a multiple-file rotary system. Bidistilled water was used as the irrigant solution. The apically extruded debris and irrigant were collected into preweighed Eppendorf tubes. The amounts of extruded debris and irrigant were assessed with a precision micro-balance. The Eppendorf tubes were incubated at 37°C for 15 days. After the incubation period, they were weighed again to assess the debris extrusion. The time required to prepare the canals was also recorded. The results were statistically analyzed using MANOVA and Bonferroni's adjustment. Considering the apically extruded debris and irrigant, there were no statistically significant differences among the groups (p > 0.05). The Reciproc group produced the highest debris (0.000632 ± 0.000162 gr) and irrigant (0.844587 ± 0.437814 ml) extrusion values. While the least extruded debris was observed with OneShape (0,000431 ± 0,000171 gr), the least extruded irrigant was observed with ProTaper system (0.564147 ± 0.370596 ml). Instrumentation was faster using the Reciproc than the other two instruments (70.27 ± 13.38 s) (p < 0.05). All of the instrumentation systems used in this study produced apical debris and irrigant extrusion. The reciprocating single-file system tended to produce more debris and irrigant extrusion, compared with the rotary systems. Considering the preparation time, the single-file systems appeared to be advantageous due to their working time.

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Section: Discussionmentioning

confidence: 99%

Assessment of apically extruded debris and irrigant produced by different nickel-titanium instrument systems

et al. 2014

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“…The hypothesis that engine driven rotary NiTi instruments will produce less debris than hand filing was strongly supported. [9][10][11][12] This could be accounted to the file design of NiTi instruments which enlarge the cervical region of the canal prior to preparing the apical part. The advantages of early cervical flaring are as follows:…”

Section: 14mentioning

confidence: 99%

“…8 In 1988, Fairbourn and Walter found that sonic, ultrasonic and cervical flaring instrumentation techniques produced less debris than conventional filing technique. 9 In 1990, Douglas revealed that balanced force technique extruded significantly less debris than either endosonic or step back techniques. No significant difference was demonstrated between endosonic and step back filing techniques.…”

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confidence: 99%

Quantitative Evaluation of Apical Extrusion of Debris and Irrigants using Four Rotary Instrumentation Systems: An in vitro Study

Nagaveni

Balakoti

Karan

et al. 2013

The Journal of Contemporary Dental Practice

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Clinical significance: The apical extrusion of infected debris may have the potential to disrupt the balance between microbial aggression and host defense, resulting in incidents of acute inflammation. During preparation, irrigants and debris, such as bacteria, dentin filings and necrotic tissue may be extruded into the periradicular region leading to periapical inflammation and postoperative flare ups. Using an instrumentation technique that minimizes apical extrusion would be beneficial to both the practitioner and patient.The purpose of the study was to evaluate the weight of debris and volume of irrigant extruded apically from extracted teeth in vitro after endodontic instrumentation using four different rotary root canal instrumentation systems. Materials and methods:Four groups of each 20 extracted mandibular premolars were instrumented using one of the four systems: ProTaper Universal (Dentsply Maillefer, Ballaigues, Switzerland)), Hero-shaper (MicroMega, Besancon, France), RaCe (FKG Dentaire, La-Chaux-de-Fonds, Switzerland) and K3 (SybronEndo, West Collins, CA). Debris and irrigant extruded from the apical foramen during instrumentation were collected in preweighed test tubes. Volume of irrigant extruded was noted. The containers were stored in incubator at 70° for two days to evaporate the moisture. Weight of dry debris was noted.Statistical analysis: Data was analyzed using Kruskall-Wallis and Mann-Whitney U test at a significance of 0.001. Results:The results indicated that all of the instrumentation systems tested caused measurable apical extrusion of debris and irrigants. Higher extrusion was observed with Protaper system which was statistically significant with Hero-Shaper, RaCe and K3 systems. There were no statistical differences between Hero-shaper, K3 and RaCe systems (p < 0.05). Conclusion:All instrumentation techniques apically extruded debris and irrigant. However, Hero-shaper, K3 and RaCe systems produced less extruded debris and irrigant than the Protaper system.

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“…Uma das razões alegadas para a não utilização da patência apical é a possível extrusão de raspas ao longo do forame apical 4,[16][17][18] , condição relacionada principalmente à dor pós-operatória 19 , além de causar injúrias aos tecidos periapicais 20,21 . O conceito da patência é controverso para alguns profissionais 8 .…”

Section: Discussionunclassified

Avaliação in vitro da influência da lima patência na manutenção do comprimento de trabalho

Barroso

Uchimura

Endo

et al. 2017

Rev. odontol. UNESP

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ResumoObjetivo: Este trabalho teve como objetivo avaliar a influência da lima patência na manutenção do comprimento de trabalho (CT) durante o preparo coroa-ápice, utilizando o sistema oscilatório em canais artificiais de acrílico. Material e método: Foram utilizados 30 cubos de acrílico: a) grupo 1 (n=10): sem a lima patência e preparo no CT (CT=16 mm); b) grupo 2 (n=10): com a lima patência K#10, comprimento de patência de 17 mm e preparo no CT; c) grupo 3 (n=10): sem a lima patência, uso de uma lima K#10 em 16 mm para recapitulação e preparo no CT. Água destilada foi utilizada como solução irrigadora. O resultado foi analisado estatisticamente pelos testes de Levene e Kruskal-Wallis (p≤0,05), pelos quais se tornou possível observar a perda do comprimento de trabalho após a instrumentação, em diferentes abordagens, em relação à lima patência. Resultado: Os resultados obtidos demonstraram que houve diferença estatisticamente significante entre os grupos 1 e 3 quando comparados ao grupo 2; entretanto, ao comparar-se o grupo 1 com o grupo 3, estes apresentaram semelhanças estatísticas. O grupo 2 foi o único que conservou o CT após a instrumentação em 16 mm, enquanto os grupos 1 e 3 apresentaram uma perda de até 2 mm do CT. Conclusão: Conclui-se que a lima patência em 1 mm além do CT mostrou-se eficaz na manutenção do seu comprimento durante o preparo do canal radicular.Descritores: Endodontia; lima de patência; patência apical. AbstractObjective: This study aimed to evaluate the influence of patency file in maintaining the working lenght (WL) for the crown-down preparation using oscillating system in artificial canals of acrylic. Material and method: Thirty acrylic cubes were divided: a) Group 1 (n=10): without patency file and it were prepared in CT (CT=16 mm); b) Group 2 (n=10): with the patency #10 K-file, patency length of 17 mm and it were prepared in CT; and c) Group 3 (n=10): without patency file, using a #10 K-file in 16 mm for recapitulation and it were prepared in CT. Distilled water was used as irrigating solution. The results were statistically analyzed by the Levene and the Kruskal-Wallis test (p≤0.05), where it observed the loss of WL after instrumentation in different approaches to patency file. Result: The results showed a statistically significant difference between groups 1 and 3 compared to group 2, however the group 1 be compared in relation to these 3 showed statistical similarities. Group 2 was the one who saved the WL after instrumentation in 16 mm, while group 1 and 3 showed a loss of up to 2 mm WL. Conclusion: It was concluded that the patency file at 1 mm beyond the WL was effective in maintaining its length during root canal preparation.Descriptors: Endodontics; patency file; apical patency. INTRODUÇÃONo preparo do canal radicular, especificamente em seu terço apical, pode acidentalmente ocorrer a compactação de raspas de dentina, bem como de fragmentos pulpares, que causam bloqueio deste conduto 1,2 e, consequentemente, a perda no comprimento de trabalho (CT) 3,4 . Tal fato ocorre dura...

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The effect of four preparation techniques on the amount of apically extruded debris

Cited by 122 publications

References 33 publications

Assessment of apically extruded debris and irrigant produced by different nickel-titanium instrument systems

Assessment of apically extruded debris and irrigant produced by different nickel-titanium instrument systems

Quantitative Evaluation of Apical Extrusion of Debris and Irrigants using Four Rotary Instrumentation Systems: An in vitro Study

Avaliação in vitro da influência da lima patência na manutenção do comprimento de trabalho

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