title: Assessment of Corticotomy Facilitated Tooth Movement and Changes in Alveolar Bone Thickness - A CT Scan Study.
abstract: BACKGROUND
  Corticotomy is an effective method of accelerating the orthodontic treatment. The aim of this study was to compare the treatment time for the extraction space closure, between corticotomy assisted and conventional orthodontic tooth movement and to check the alveolar bone thickness before and after corticotomy procedure in the corticotomy group.
  
  
  METHODS
  Cross-sectional clinical study.
  
  
  METHODS
  Twenty patients (age>15 y) requiring orthodontic treatment with upper anterior retraction in the extraction space of 1(st) premolar were selected and were randomised into control and corticotomy group each group consisted of 10 subjects. Pre retraction, corticotomy was performed in the maxillary anterior segment. The pre and post retraction CT scans were recorded and the thickness of the alveolar plates were measured at crestal level (S1), mid root level (S2) and apical level (S3) PreTreatment (T1). The same measurements were repeated after incisor retraction was completed PostTreatment (T2).
  
  
  METHODS
  Student's t-test, Pearson correlation coefficient.
  
  
  RESULTS
  There was a significant difference in retraction time (days) between control and corticotomy groups (p<0.001). Also, there were significant difference in total alveolar bone thickness at the crest region for all the four incisor teeth (p<0.05). A significant difference was observed in total alveolar bone thickness at the S2 and S3 level for 11, 21 and 11, 12 and 22 (p<0.05) respectively.
  
  
  CONCLUSIONS
  Alveolar corticotomies not only accelerates the orthodontic treatment but, also provides the advantage of increased alveolar width to support the teeth and overlying structures.
authors.affiliation: Professor, Department of Orthodontics, Institute of Dental Sciences , Bareilly, India .
authors.forename: Preeti
authors.initials: P
authors.lastname: Bhattacharya
authors.affiliation: Professor, Department of Periodontics, Institute of Dental Sciences , Bareilly, India .
authors.forename: Hirak
authors.initials: H
authors.lastname: Bhattacharya
authors.affiliation: Senior Lecturer, Department of Orthodontics, Institute of Dental Sciences , Bareilly, India .
authors.forename: Arbab
authors.initials: A
authors.lastname: Anjum
authors.affiliation: Post Graduate Student, Department of Orthodontics, Institute of Dental Sciences , Bareilly, India .
authors.forename: Ravi
authors.initials: R
authors.lastname: Bhandari
authors.affiliation: Head and Professor, Department of Orthodontics, Institute of Dental Sciences , Bareilly, India .
authors.forename: D K
authors.initials: DK
authors.lastname: Agarwal
authors.affiliation: Senior Lecturer, Department of Orthodontics, Institute of Dental Sciences , Bareilly, India .
authors.forename: Ankur
authors.initials: A
authors.lastname: Gupta
authors.affiliation: Senior Lecturer, Department of Orthodontics, Institute of Dental Sciences , Bareilly, India .
authors.forename: Juhi
authors.initials: J
authors.lastname: Ansar
keywords: Corticotomy facilitated orthodontics; Periodontally accelerated osteogenic orthodontics; Regional acceleratory phenomena