Introduction The purpose of this study was to evaluate the prevalence and patterns of tooth
agenesis in subjects with Angle Class II Division 2 malocclusion compared with general
orthodontic patients in Japan. Methods Panoramic radiographs, dental casts, and
cephalograms of 76 patients with Class II Division 2 malocclusions (52 female, 24 male) and
270 orthodontic patients as the control group (168 female, 102 male) who were 14 years of
age or older were selected. The prevalences of tooth agenesis in this cohort and in each …

Objective The aim of this case-control retrospective study was to assess the prevalence and
pattern of tooth agenesis in a group of Italian Caucasian test subjects with Class II division 2
malocclusion. The findings were then compared with an Italian control group of orthodontic
patients and with previous studies performed in other countries. Material and method Six
hundred patients (37 subjects with Angle Class II division 2 malocclusion and 563
orthodontic patients with other malocclusions), aged 7 or older, from the Orthodontic …