Complicações endodônticas em molares superiores instrumentados e obturados por estudantes de odontologia: estudo em exames por imagem

Abstract

The objective of this ex vivo study was to evaluate the presence of endodontic complications in maxillary molars instrumented and filled with different techniques by dental students, through imaging examinations. A total of 120 maxillary molars were used, which were endodontic treated by four dental students. The teeth were divided into three groups (n=40): instrumentation with manual files and filling by lateral condensation; instrumentation with NiTi rotatory files and filling by lateral condensation; instrumentation with NiTi rotatory files and thermocompression filling. Subsequently, the teeth were submitted to orthoradial periapical radiographs (PR), and cone beam computed tomography (CBCT) with and without the tool of metal artifacts reduction. The images were evaluated for the presence of seven endodontic complications, and the data analyzed at 5%. There was a difference in the frequency of detection of untreated canals, excessive canal dilation, length of filling below the root apex, and non-homogeneous filling between RP and both CBCT modalities (p<0.05). Both instrumentation and filling technique influenced the presence of a fractured instrument, excessive canal dilation, and filling below and beyond the root apex (p<0.05). It was concluded that there is a high prevalence of endodontic complications in maxillary molars treated by dental students, and that both instrumentation and filling techniques, as well as the choice of imaging examination, influence the diagnosis of such complications.