A post-treatment analysis of overjet relapse

Thesis (M.Sc.D.)--Boston University School of Graduate Dentistry, 1972. (Orthodontics)Bibliography included.Thirty-six cases, six months to two years in retention were examined for antero-posterior changes during and after active treatment. All cases except one were Glass II. Pretreatment, post-treatment and two sets of retention cephalograms, panorexes and models were evaluated and the data examined to determine the association of certain skeletal and dental parameters to overjet. During treatment the skeletal changes (SNA, SNB, ANB) were small, while the dental changes (maxillary incisor to NA, mandibular incisor to NB and the interincisal angles) were large. Skeletal changes appeared to be more stable in retention than dental changes. Overjet appeared unrelated to the degree of intercuspation, a long postulated theory regarding post-treatment stability