title: Treatment effects of microimplant-aided sliding mechanics on distal retraction of posterior teeth.
abstract: BACKGROUND
  Our objective was to quantify the treatment effects of microimplant-aided mechanics on group distal retraction of the posterior teeth.
  
  
  METHODS
  The pretreatment and posttreatment cephalometric radiographs and dental casts of 23 patients (mean age, 22.1 ± 5.17 years), treated with distalization of the posterior teeth against microimplant anchorage and without extraction of the premolars or other teeth except the third molars, were used. The soft-tissue, skeletal, and dental measurements in the vertical and anteroposterior dimensions were analyzed. The changes in interpremolar and intermolar widths and rotations of the molars were analyzed with dental casts.
  
  
  RESULTS
  The upper and lower lips were repositioned distally. The Frankfort horizontal to mandibular plane angle was decreased in the adult group. The maxillary posterior teeth were distalized by 1.4 to 2.0 mm with approximately 3.5° of distal tipping, and the mandibular posterior teeth were also distalized by 1.6 to 2.5 mm with approximately 6.6° to 8.3° of distal tipping. The maxillary posterior teeth showed intrusion by 1 mm. There were increases in arch widths at the premolars and molars. The overall success of microimplants was 89.7%; a well-experienced clinician had a higher success rate (98%) than did novices in this sample. The mean treatment time was 20 ± 4.9 months.
  
  
  CONCLUSIONS
  With microimplant-aided sliding mechanics, clinicians can distalize all posterior teeth together with less distal tipping. The technique seems effective and efficient to treat patients who have mild arch length discrepancy without extractions.
authors: Department of Orthodontics, School of Dentistry, Kyungpook National University, Jung-Gu, Daegu, Korea.
authors: Young-Hee
authors: YH
authors: Oh
authors: Hyo-Sang
authors: HS
authors: Park
authors: Tae-Geon
authors: TG
authors: Kwon
mesh_terms: D000293:Adolescent; D000328:Adult; D001641:Bicuspid / Q000473:pathology*; D001696:Biomechanical Phenomena; D002508:Cephalometry / Q000379:methods; D002648:Child; D003724:Dental Arch / Q000473:pathology; D015921:Dental Implants; D005260:Female; D006801:Humans; D007180:Incisor / Q000473:pathology; D008046:Lip / Q000473:pathology; D008297:Male; D008334:Mandible / Q000473:pathology; D008437:Maxilla / Q000473:pathology; D003765:Models, Dental; D008963:Molar / Q000473:pathology*; D052280:Orthodontic Anchorage Procedures / Q000295:instrumentation*; D012399:Rotation; D012658:Sella Turcica / Q000473:pathology; D013314:Stress, Mechanical; D013997:Time Factors; D014087:Tooth Movement Techniques / Q000295:instrumentation* / Q000379:methods; D016896:Treatment Outcome; D014716:Vertical Dimension; D055815:Young Adult
chemical_list: D015921:Dental Implants