title: A retrospective overview of treatment choice and outcome in 126 cases with arrested eruption of mandibular second molars.
abstract: The purpose of the present retrospective study was to analyze treatment choice and outcome in patients with retention/impaction of the mandibular second molar. Radiographic material, from three large clinics, from 106 patients (60 males and 46 females) with 126 retained/impacted permanent mandibular second molars treated during the years 1985-2005 was evaluated for treatment choice and treatment outcome. Follow-up questionnaires were sent to dentists in cases where treatment outcome could not be determined from the radiographic material. Clinical evaluation was not possible as the patients were no longer associated with the clinic where they were treated. The cases were categorized into six groups: (A) no treatment; (B) orthodontic treatment; (C) surgical exposure of the second molar; (D) removal of the third molar; (E) removal of the second molar; and (F) other treatments. The various treatment choices performed during 1985-2005 showed acceptable results in 66 of the cases. In 23 cases, the results were unacceptable. In 37 cases, the radiographic material could not document the outcome nor was evaluation of the final outcome possible due to the patient's young age. Remarkable are the high percentages of unacceptable treatment outcome, 25.9% in group D (removal of third molar) and 23% in group E (removal of second molar). As the material was collected before new advanced methods of surgical uprighting and new methods of orthodontic uprighting had been introduced, these percentages are expectedly lower today. Even so, it is highly recommended to focus especially on these two groups in future studies on treatment outcome.
authors.affiliation: Department of Orthodontics, Faculty of Health Sciences, Institute of Odontology, University of Copenhagen, 20 Nørre Alle, 2200 Copenhagen, Denmark.
authors.forename: Jacob
authors.initials: J
authors.lastname: Kenrad
authors.forename: Henriette
authors.initials: H
authors.lastname: Vedtofte
authors.forename: Jens Ove
authors.initials: JO
authors.lastname: Andreasen
authors.forename: Maria Julie
authors.initials: MJ
authors.lastname: Kvetny
authors.forename: Inger
authors.initials: I
authors.lastname: Kjær
mesh_terms: D000293:Adolescent; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible; D008963:Molar / Q000002:abnormalities / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D008964:Molar, Third / Q000601:surgery; D019647:Oral Surgical Procedures; D050793:Orthodontic Extrusion; D011859:Radiography; D012189:Retrospective Studies; D014078:Tooth Eruption; D014081:Tooth Extraction; D014095:Tooth, Impacted / Q000000981:diagnostic imaging / Q000601:surgery / Q000628:therapy*; D016896:Treatment Outcome; D055815:Young Adult