December, 2009, Vol. 11, No. 4

CONTENTS

Effects of different repolishing techniques on colour change of provisional prosthetic materials
Vygandas Rutkunas, Vaidotas Sabaliauskas
105 -112

Early Morphofunctional Response of Contact Tissue after Intraosal Implantation in Rabbit Jaw of Pure Synthetic Hydroxyapatite (HAp) Bioceramic Materials and HAp Saturated with Lidocaine
Ilze Salma, Mara Pilmane, Andrejs Skagers, Janis Vetra, Girts Salms, Liga Berzina-Cimdina, Rita Serzane
113-118

Relationship between tooth size discrepancies and malocclusion
Kristina Lopatiene, Aiste Dumbravaite
119-124

Osteopontin and Osteocalcin in Maxilla Tissue of Skeletal Class III Patients
Iveta Jankovska, Mara Pilmane, Ilga Urtane
125-128

In vitro investigation of the integration depth of oral fluids and disinfectants into alginate impressions
Rimas Surna, Jonas Junevicius, Evaldas Rutkauskas
129-134

© 2009 Stomatologija

Stomatologija 2009; 11 (4): 119-124 234 KB

Relationship between tooth size discrepancies and malocclusion

Kristina Lopatiene, Aiste Dumbravaite

Summary

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.

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*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.

E-mail address: aiste910@yahoo.com