title: Crown dilaceration in permanent teeth after trauma to the primary predecessors: report of three cases.
abstract: Crown dilaceration of permanent teeth occurs due to the non-axial displacement of the already formed hard tissue portion of the developing crown at an angle to their longitudinal axis due to trauma to the primary predecessors. This is a rare condition, representing only 3% of the total of injuries to developing teeth and usually occurs in permanent maxillary incisors because of the close proximity of their tooth germs to the primary incisors, which are more susceptible to trauma. This alteration frequently results from the intrusion of a primary tooth when the child is around 2 years of age, at which time half of the crown of the permanent successor is already formed. Teeth with dilacerated crowns may either erupt with buccal or lingual displacement or remain impacted. The treatment may involve endodontic, orthodontic, restorative and prosthetic procedures. This paper reports the restorative treatment proposed to reestablish the esthetics and function of the affected teeth in three cases of crown dilaceration in permanent maxillary incisors after trauma to their primary predecessors.
authors.affiliation: Department of Pediatric Clinic, Ribeirão Preto Dental School, University of São Paulo, Brazil.
authors.forename: Talitha de Siqueira
authors.initials: Tde S
authors.lastname: Mellara
authors.forename: Paulo
authors.initials: P
authors.lastname: Nelson-Filho
authors.forename: Alexandra Mussolino de
authors.initials: AM
authors.lastname: Queiroz
authors.forename: Milton
authors.initials: M
authors.lastname: Santamaria Júnior
authors.forename: Raquel Assed Bezerra da
authors.initials: RA
authors.lastname: Silva
authors.forename: Lea Assed Bezerra da
authors.initials: LA
authors.lastname: Silva
mesh_terms: D002648:Child; D019229:Dentition, Permanent; D005260:Female; D006801:Humans; D008297:Male; D014084:Tooth Avulsion / Q000150:complications*; D019228:Tooth Crown / Q000293:injuries*; D018677:Tooth Injuries / Q000175:diagnosis / Q000628:therapy; D014094:Tooth, Deciduous / Q000293:injuries*; D014095:Tooth, Impacted / Q000209:etiology* / Q000628:therapy; D014097:Tooth, Unerupted / Q000473:pathology*