|Baltic Dental and Maxillofacial Journal|
December, 2009, Vol. 11, No. 4
Early Morphofunctional Response of Contact Tissue after Intraosal Implantation in Rabbit Jaw of Pure Synthetic Hydroxyapatite (HAp) Bioceramic Materials and HAp Saturated with Lidocaine
© 2009 Stomatologija
Stomatologija 2009; 11 (4): 119-124 234 KB
Relationship between tooth size discrepancies and malocclusion
Kristina Lopatiene, Aiste Dumbravaite
The main goal in comprehensive orthodontic treatment is to obtain optimal final occlusion, overbite and overjet. Tooth size discrepancies of the maxillary and mandibular arches is an important factor for achieving this goal. The aim of this study was to determine the relationship between the Bolton overall and anterior ratio and the relationship between first molars according to the Angle classification, and the size of overjet and overbite. The study sample consisted of 181 pretreatment dental casts with fully erupted and complete permanent dentitions from first molar to first molar, which were selected randomly. The evaluation of the Bolton anterior ratio showed that anterior ratio ranged between 66.038% and 96.907%, mean value 77.889±4.296. The lowest mean value of the Bolton anterior ratio was in Angle Class II, and the highest in Angle Class III, but this difference was not statistically significant. The evaluation of the Bolton overall ratio showed that the overall ratio ranged between 85.648% and 98.907%, mean value 92.735±2.489. The lowest mean value of the Bolton overall ratio was in Angle Class II, and the highest in Angle Class III, but this difference was not statistically significant. Moderate correlation was detected between the Bolton overall ratio and overjet (r=-0.45, p<0.001) The evaluation of the relationship between the Bolton overall ratio and overbite showed that a statistically reliable weak correlation (r=0.18, p<0.001). The evaluation of the Bolton ratio is clinically important and affects the planning of orthodontic treatment.
Key words: Bolton's ratio, tooth size discrepancy, malocclusion, overbite, overjet.
Received: 04 03 2009
Accepted for publishing: 28 12 2009
*Clinic of Orthodontics, Kaunas University of Medicine, Kaunas, Lithuania
Kristina Lopatiene* D.D.S., assistant professor
Aiste Dumbravaite* D.D.S., assistant professor
Address correspondence to: Aiste Dumbravaite, Clinic of Orthodontics, Kaunas University of Medicine, Eiveniu str. 2, Kaunas, Lithuania.
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