title: MIXED DENTITION SPACE ANALYSIS OF A SOUTHERN ITALIAN POPULATION: NEW REGRESSION EQUATIONS FOR UNERUPTED TEETH.
abstract: Mixed dentition analysis forms a critical aspect of early orthodontic treatment. In fact an accurate space analysis is one of the important criteria in determining whether the treatment plan may involve serial extraction, guidance of eruption, space maintenance, space regaining or just periodic observation of the patients. The aim of the present study was to calculate linear regression equations in mixed dentition space analysis, measuring 230 dental casts mesiodistal tooth widths, obtained from southern Italian patients (118 females, 112 males, mean age 15±3 years). Students t-test or Wilcoxon test for independent and paired samples were used to determine right/left side and male/female differences. On the basis of the sum of the mesiodistal diameters of the 4 mandibular incisors as predictors for the sum of the widths of the canines and premolars in the mandibular mixed dentition, a new linear regression equation was found: y = 0.613x+7.294 (r= 0.701) for both genders in a southern Italian population. To better estimate the size of leeway space, a new regression equation was found to calculate the mesiodistal size of the second premolar using the sum of the four mandibular incisors, canine and first premolar as a predictor. The equation is y = 0.241x+1.224 (r= 0.732). In conclusion, new regression equations were derived for a southern Italian population.
authors.affiliation: School of Medicine, University of Bari Aldo Moro, Bari, Italy.
authors.forename: N
authors.initials: N
authors.lastname: Cirulli
authors.affiliation: Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Ballini
authors.affiliation: School of Medicine, University of Bari Aldo Moro, Bari, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Cantore
authors.affiliation: Department of Surgical and Morphological Science, Dental School, University of Varese, Varese Italy.
authors.forename: D
authors.initials: D
authors.lastname: Farronato
authors.affiliation: Department of Interdisciplinary Medicine, University of Bari Aldo Moro, Bari, Italy; 5School of Medicine, University of Bologna, Bologna, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Inchingolo
authors.affiliation: School of Medicine, University of Bari Aldo Moro, Bari, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Dipalma
authors.affiliation: School of Medicine, University of Bologna, Bologna, Italy.
authors.forename: M R
authors.initials: MR
authors.lastname: Gatto
authors.affiliation: School of Medicine, University of Bologna, Bologna, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Alessandri Bonetti
mesh_terms: D000293:Adolescent; D001641:Bicuspid / Q000033:anatomy & histology; D002648:Child; D003481:Cuspid / Q000033:anatomy & histology; D003818:Dentition, Mixed; D005260:Female; D006801:Humans; D007180:Incisor / Q000033:anatomy & histology; D007558:Italy / Q000453:epidemiology; D016014:Linear Models; D008297:Male; D008334:Mandible; D003765:Models, Dental; D009811:Odontometry / Q000706:statistics & numerical data*; D015203:Reproducibility of Results; D012727:Sex Characteristics; D014076:Tooth Diseases / Q000453:epidemiology*; D014097:Tooth, Unerupted / Q000033:anatomy & histology*