title: Detection and measurement of endodontic root perforations using a newly designed apex-locating handpiece.
abstract: Access openings and lateral root perforations were prepared in 40 single-rooted extracted teeth. The distance to the perforations was measured visually and then with the Tri Auto ZX. The electronic device was used first in its apex-locating function and then in conjunction with its automatic reverse mechanism. On average, the electronically measured length was slightly shorter than the visually measured length (P < 0.05). When the automatic reverse mechanism was used, the values registered were either consistent with or slightly different (+/- 0.5 mm) from the electronically measured length (P > 0.05). The results of this study revealed that the Tri Auto ZX detected and measured endodontic root perforations within a range of clinically acceptable variations.
authors.affiliation: Department of Adult Dental Care, Faculty of Odontology, University of Buenos Aires, Argentine Republic. info@odon.uba.ar
authors.forename: O
authors.initials: O
authors.lastname: Zmener
authors.forename: F
authors.initials: F
authors.lastname: Grimberg
authors.forename: G
authors.initials: G
authors.lastname: Banegas
authors.forename: L
authors.initials: L
authors.lastname: Chiacchio
mesh_terms: D003754:Dental High-Speed Equipment; D003762:Dental Instruments / Q000009:adverse effects*; D003786:Dental Pulp Cavity / Q000033:anatomy & histology* / Q000293:injuries; D006801:Humans; D009811:Odontometry / Q000295:instrumentation; D019227:Tooth Apex / Q000033:anatomy & histology*; D018677:Tooth Injuries / Q000175:diagnosis / Q000209:etiology; D014092:Tooth Root / Q000293:injuries*