title: The use of cortical screw anchorage for closing a space resulting from the loss of a lower molar--a case report.
abstract: Orthodontic microscrews are temporary implants providing skeletal anchorage, which may be used for en-masse incisor retraction, as well as for the protraction of posterior segments in order to close spaces without retracting anterior teeth. A patient, aged 16 was reported in whom a miniscrew of 9.5 mm length and 2 mm dimension was inserted distal to the lower left second premolar 2 months after extracting the first molar with periapical bone lesion after failed endodontic treatment. The lower third molar was mesialised using direct anchorage and a power arm to minimize mesial tipping. The space closed within 20 months, followed by a spontaneous eruption of the adjacent third molar. This treatment method constitutes a good alternative to third molar autotransplantation, allowing the avoidance of the risk of surgical procedure.
authors.forename: Joanna
authors.initials: J
authors.lastname: Janiszewska-Olszowska
authors.forename: Alina
authors.initials: A
authors.lastname: Socha
authors.forename: Paulina
authors.initials: P
authors.lastname: Bińczak
mesh_terms: D000293:Adolescent; D001863:Bone Screws; D002508:Cephalometry; D015921:Dental Implants; D005260:Female; D006801:Humans; D008963:Molar; D052280:Orthodontic Anchorage Procedures / Q000379:methods*; D019516:Orthodontic Space Closure / Q000295:instrumentation*; D010483:Periapical Diseases / Q000000981:diagnostic imaging / Q000628:therapy; D011859:Radiography; D018915:Root Canal Preparation / Q000009:adverse effects; D014081:Tooth Extraction; D014098:Toothache / Q000209:etiology; D017211:Treatment Failure
chemical_list: D015921:Dental Implants