title: Micro-CT assessment of two different endodontic preparation systems.
abstract: The aim of this study was to compare two endodontic preparation systems using micro-CT analysis. Twenty-four one-rooted mandibular premolars were selected and randomly assigned to two groups. The samples (n = 12) of Group 1 were prepared using the ProTaper Universal rotary system, while Group 2 (n = 12) was prepared using the EndoEZE AET system complemented by manual apical preparation with K-type hand files up to #30. A 2.5% sodium hypochlorite solution was used in both groups for irrigating. Both groups were scanned by high-resolution microcomputed tomography before and after preparation (SkyScan 1172, SkyScan, Kontich, Belgium). The root canal volume and surface area was measured before and after preparation, and the differences were calculated and analyzed for statistically significant differences using ANOVA complemented by the Tukey test (p < 0.05). The results showed no statistically significant differences between the mean volumes of dentin removal by the two systems. However, the EndoEZE AET system presented a significantly greater mean surface area compared to the ProTaper system (p < 0.05). The EndoEZE AET system enabled preparation of a greater root canal surface area when compared to the ProTaper Universal system. There seemed to be no difference in dentin volume loss between the two systems used.
authors.affiliation: Department of Endodontics, School of Dentistry, Univ Cruzeiro do Sul, São Paulo, Brazil. caciomn@usp.br
authors.forename: Cacio
authors.initials: C
authors.lastname: Moura-Netto
authors.forename: Renato Miotto
authors.initials: RM
authors.lastname: Palo
authors.forename: Carlos Henrique Ribeiro
authors.initials: CH
authors.lastname: Camargo
authors.forename: Cornelis Hans
authors.initials: CH
authors.lastname: Pameijer
authors.forename: Marcia Regina Ramalho da Silva
authors.initials: MR
authors.lastname: Bardauil
mesh_terms: D003722:Dental Alloys; D003762:Dental Instruments; D003786:Dental Pulp Cavity / Q000000981:diagnostic imaging*; D003804:Dentin / Q000737:chemistry; D004867:Equipment Design; D006801:Humans; D009532:Nickel; D011897:Random Allocation; D015203:Reproducibility of Results; D018915:Root Canal Preparation / Q000295:instrumentation* / Q000379:methods; D013193:Stainless Steel; D018709:Statistics, Nonparametric; D013499:Surface Properties; D014025:Titanium; D055114:X-Ray Microtomography
chemical_list: D003722:Dental Alloys; C040654:titanium nickelide; D013193:Stainless Steel; D009532:Nickel; D014025:Titanium