title: Complete pre-eruptive idiopathic crown resorption.
abstract: The purpose of this paper was to present the unique case of complete pre-eruptive idiopathic crown resorption, few of which have ever been reported, because most have concerned partial idiopathic crowns. Crown resorption affects only a part of the crown and begins when crown mineralization is complete, leading to hypomineralization of the teeth. Treatment usually consists of restorative/endodontic care or extraction. A 12-year-old-boy presented with complete idiopathic resorption of the permanent mandibular left third molar and secondary failure of eruption of the permanent mandibular left first molar. The finding was incidental during routine radiographs for orthodontic treatment and was documented using cone beam computed tomography and computed tomography (one-mm slices). Follow-up, using a panoramic radiograph, occurred after one year, confirming the absence of the third molar. No preventive or therapeutic regimen is known.
authors.affiliation: School of Dentistry, Department of Biomedical, Surgical and Dental Sciences, Unit of Orthodontics and Pediatric Dentistry, University of Milan, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy. studiocossellu@hotmail.it.
authors.forename: Gianguido
authors.initials: G
authors.lastname: Cossellu
authors.affiliation: School of Dentistry, Department of Biomedical, Surgical and Dental Sciences, Unit of Orthodontics and Pediatric Dentistry, University of Milan, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy.
authors.forename: Francesca
authors.initials: F
authors.lastname: Angiero
authors.affiliation: Department of Medical Sciences and Diagnostic Integrated, S. Martino Hospital, University of Genoa, Genova, Italy.
authors.forename: Giampietro
authors.initials: G
authors.lastname: Farronato
mesh_terms: D002648:Child; D054893:Cone-Beam Computed Tomography / Q000379:methods; D005500:Follow-Up Studies; D006801:Humans; D033162:Incidental Findings; D008297:Male; D008963:Molar / Q000000981:diagnostic imaging; D008964:Molar, Third / Q000000981:diagnostic imaging*; D011862:Radiography, Panoramic / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000379:methods; D020254:Tooth Ankylosis / Q000000981:diagnostic imaging; D019228:Tooth Crown / Q000000981:diagnostic imaging*; D014091:Tooth Resorption / Q000000981:diagnostic imaging*; D014097:Tooth, Unerupted / Q000000981:diagnostic imaging*