Overlap of the primary dentition in children.
OBJECTIVE
The aim of the present study was to estimate the amount of overlap in children with the primary dentition.


METHODS
The sample consisted of 20 Japanese boys between 3 and 5 years of age (mean age: 4 years 10 months). Landmarks on their maxillary and mandibular dental models were digitized using a three-dimensional mechanical digitizer in a single coordinate system. Multilevel statistical models created best-fit polynomial curves to determine overbite, overjet and buccal height of all primary teeth and describe the dental arch forms.


RESULTS
No significant side differences were detected. The primary canine showed the largest overbite (1.87 mm) and buccal height (9.07 mm). The primary second molar exhibited the largest overjet (2.76 mm). Buccal height was the least variable measurement.


CONCLUSIONS
Occlusal relationships of the primary dentition were evaluated in 3-dimensions, establishing overlap variables for clinical diagnosis and treatment planning.
Saitoh
Issei
I
Department of Pediatric Dentistry, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1, Sakuragaoka, Kagoshima-shi, Kagoshima 890-8544, Japan. isseionj@denta.hal.kagoshima-u.ac.jp
Hayasaki
Haruaki
H
Inada
Emi
E
Maruyama
Tomoaki
T
Takemoto
Yoshihiko
Y
Yamasaki
Youichi
Y
D000465:Algorithms; D002675:Child, Preschool; D003724:Dental Arch / Q000473:pathology; D006801:Humans; D021621:Imaging, Three-Dimensional; D008297:Male; D008310:Malocclusion / Q000473:pathology*; D003765:Models, Dental; D055361:Multilevel Analysis; D012016:Reference Values; D012044:Regression Analysis; D014094:Tooth, Deciduous