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A laboratory study of the scouting ability of two reciprocating glide path instruments in mesial root canals of extracted mandibular molars.
Pereira, R P; Alcalde, M P; Duarte, M A H; Vivan, R R; Bueno, C E S; Duque, J A; Calefi, P H S; Bramante, C M.
Afiliação
  • Pereira RP; Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil.
  • Alcalde MP; Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil.
  • Duarte MAH; Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil.
  • Vivan RR; Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil.
  • Bueno CES; Department of Endodontics, São Leopoldo Mandic Dental Research Center, Campinas, Brazil.
  • Duque JA; Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil.
  • Calefi PHS; Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil.
  • Bramante CM; Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil.
Int Endod J ; 54(7): 1166-1174, 2021 Jul.
Article em En | MEDLINE | ID: mdl-33556198
AIM: To evaluate in a laboratory setting the performance of two reciprocating glide path systems, WaveOne Gold Glider (WO) and R-Pilot (RP), to create a glide path in mesial root canals of mandibular molars and to assess the torsional resistance of instruments after performing the glide path. METHODOLOGY: A total of 60 mesial root canals of extracted human mandibular molars were divided into two groups (n = 30) according to the glide path system to be used. The data from the volume of each canal, acquired by microcomputed tomography (micro-CT), were validated statistically for the anatomical pairing of the groups. Preparation time, frequency in gaining apical patency, plastic deformation rate of instruments, and canal transportation and centring ability were recorded and compared statistically. The torsional fatigue of the instruments after use was also evaluated. Data were analysed using Fisher's exact test and Mann-Whitney U-test with a 5% significance level. RESULTS: No significant differences were found between groups regarding the time required to perform the glide path, the frequency distributions of the canals classified as patent and the instruments with plastic deformation after use (P > 0.05). No significant differences were found between groups regarding the degree of canal transportation and centring ability at the cervical, middle and apical thirds (P > 0.05). The RP groups had significantly greater maximum torsional strength values compared with the WO groups (P < 0.05). The used WO group had greater angular deflection to fracture when compared to the new WO group (P < 0.05). A significant difference was also found in the percentage of loss of angular deflection in a comparison of the WO group with the RP group (P < 0.05). CONCLUSIONS: The WO and RP instruments performed the same in terms of preparation time, plastic deformation, gaining apical patency, degree of canal transportation and centring ability. The RP instruments had greater torsional strength, less angular deflection and lower percentage of loss in angular deflection than the WO. The used WO group had the greatest angular deflection values.
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Texto completo: 1 Bases de dados: MEDLINE Assunto principal: Cavidade Pulpar / Laboratórios Limite: Humans Idioma: En Revista: Int Endod J Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil

Texto completo: 1 Bases de dados: MEDLINE Assunto principal: Cavidade Pulpar / Laboratórios Limite: Humans Idioma: En Revista: Int Endod J Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil