An evaluation of changes in mandibular anterior alignment from 10 to 20 years postretention.
Pretreatment, end of treatment, 10-year postretention, and 20-year postretention records of 31 four premolar extraction cases were assessed to evaluate stability and relapse of mandibular anterior alignment. Crowding continued to increase during the 10- to 20-year postretention phase but to a lesser degree than from the end of retention to 10 years postretention. Only 10% of the cases were judged to have clinically acceptable mandibular alignment at the last stage of diagnostic records. Cases responded in a diverse unpredictable manner with no apparent predictors of future success when considering pretreatment records or the treated results.
Little
R M
RM
Department of Orthodontics, University of Washington, Seattle.
Riedel
R A
RA
Artun
J
J
D000328:Adult; D002508:Cephalometry; D003724:Dental Arch / Q000033:anatomy & histology*; D005069:Evaluation Studies as Topic; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor / Q000033:anatomy & histology*; D008310:Malocclusion / Q000628:therapy*; D008334:Mandible / Q000033:anatomy & histology*; D008875:Middle Aged; D012008:Recurrence; D012690:Serial Extraction; D014087:Tooth Movement Techniques