Your browser doesn't support javascript.
loading
Endodontic retreatment using a single instrument from four nickel-titanium systems - a micro-ct study
Azevedo, Marco Antonio Diniz; Silva, Thiago Gomes da; Fernandes, Ângela; Piasecki, Lucila; Fariniuk, Luiz Fernando; Silva Neto, Ulisses Xavier da.
  • Azevedo, Marco Antonio Diniz; Pontifícia Universidade Católica do Paraná. Postgraduate Program in Endodontics, School of Health and Biosciences. Curitiba. BR
  • Silva, Thiago Gomes da; Universidade Federal do Paraná. Curitiba. BR
  • Fernandes, Ângela; Universidade Federal do Paraná. Curitiba. BR
  • Piasecki, Lucila; University at Buffalo. NY. US
  • Fariniuk, Luiz Fernando; Universidade Positivo. Curitiba. BR
  • Silva Neto, Ulisses Xavier da; Pontifícia Universidade Católica do Paraná. Postgraduate Program in Endodontics, School of Health and Biosciences. Curitiba. BR
Braz. dent. j ; 31(6): 605-610, Nov.-Dec. 2020. tab, graf
Article in English | LILACS, BBO | ID: biblio-1132347
ABSTRACT
Abstract This study evaluated the efficiency of using a single instrument from three different rotary multi-file systems and compared them with that of a reciprocating single-file for endodontic retreatment by means of micro-CT. Sixty extracted canines were prepared using a size F2 ProTaper Universal file and obturated. After 30 days of storage at 37ºC and 100% humidity, the teeth were randomly divided into four groups (n=15) based on the type of instrument used to retreatment ProTaper Next (PTN), ProTaper Gold (PTG), TRUShape 3D (TS), and WaveOne (WO). The canals were retreated using only the size 40 instrument from each system according to the manufacturer's recommendations for torque and speed. The time required to remove the filling material was recorded in seconds. The amount of initial and residual filling material and the quantity of dentin removed were assessed by means of micro-CT. Data were statistically analyzed (ANOVA and Kruskal-Wallis) at a 5% significance level. TS instruments required the highest (p<0.05) amount of time (mean, 384.80 ±144.92) compared with the WO (229.67±68.16) and PTG (248.67±64.22) and not so different from PTN instruments (327.67±133.3). No differences in the amount of dentin removed, initial and residual filling volume, and percentages of filling material were observed among the groups. The use of a single rotary instrument from the PTG, TS, and PTN systems was as effective as that of the single-file reciprocating WO system. However, none of the instruments was able to remove the filling materials completely.
RESUMO
Resumo Este estudo laboratorial avaliou por meio de micro-CT a eficiência do uso de um único instrumento de três sistemas rotatórios em retratamentos endodônticos, comparados a um instrumento único reciprocante. Sessenta caninos extraídos foram preparados usando o sistema ProTaper Universal (F2) e obturados. Após 30 dias de armazenamento a 37 ºC e 100% de umidade, os dentes foram divididos aleatoriamente em quatro grupos (n = 15), de acordo com o instrumento utilizado para remover as obturações endodônticas ProTaper NEXT (PTN), ProTaper Gold (PTG), TRUShape 3D (TS) e WaveOne (WO). Os canais foram retratados usando apenas o instrumento tamanho 40 de cada sistema, seguindo as recomendações do fabricante para torque e velocidade. O tempo necessário para remover a obturação foi registrado em segundos. A quantidade de material remanescente e o volume de dentina removida foram avaliadas por meio de micro-CT. Análise estatística foi realizada (ANOVA e Kruskal-Wallis), com nível de significância de 5%. O tempo de trabalho no grupo TS foi significativamente maior (p<0.05) (média, 384,80 ± 144,92) comparado a WO (229,67 ± 68,16) e PTG (248,67 ± 64,22), e similar a PTN (327,67 ± 133,3). Não houve diferenças entre os grupos na quantidade de dentina removida e nas porcentagens de material obturador residual. O uso de apenas um instrumento rotatório dos sistemas PTG, TS e PTN foi tão eficaz quanto o do sistema WO reciprocante na remoção do material obturador. No entanto, nenhum dos instrumentos conseguiu remover completamente os materiais obturadores.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Root Canal Filling Materials / Root Canal Obturation Type of study: Controlled clinical trial Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2020 Type: Article Affiliation country: Brazil / United States Institution/Affiliation country: Pontifícia Universidade Católica do Paraná/BR / Universidade Federal do Paraná/BR / Universidade Positivo/BR / University at Buffalo/US

Similar

MEDLINE

...
LILACS

LIS


Full text: Available Index: LILACS (Americas) Main subject: Root Canal Filling Materials / Root Canal Obturation Type of study: Controlled clinical trial Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2020 Type: Article Affiliation country: Brazil / United States Institution/Affiliation country: Pontifícia Universidade Católica do Paraná/BR / Universidade Federal do Paraná/BR / Universidade Positivo/BR / University at Buffalo/US