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Stomatologija 2015; 17 (1): 3-8 271 KB

Heritability estimates of dental arch parameters in Lithuanian twins

Vilma Švalkauskienė, Kastytis Šmigelskas, Loreta Šalomskienė, Irena Andriuškevičiūtė, Aurelija Šalomskienė, Arūnas Vasiliauskas, Antanas Šidlauskas

Summary

Background. The genetic influence on dental arch morphology may be country-specific, thus it is reasonable to check the estimates of genetics across different populations. The purpose of this study was to evaluate the heredity of dental arch morphology in the sample of Lithuanian twins with accurate zygosity determination.

Material and methods. The study sample consisted of digital dental models of 40 monozygotic (MZ) and 32 dizygotic (DZ) twin pairs. The estimates of heritability (h²) for dental arch breadth and length were calculated.

Results. All dental arch breadths and lengths were statistically significantly larger in men than in women. Arch length differences between genders were less expressed than largest breadth differences. In the upper jaw the largest genetic effect was found on the arch breadth between lateral incisors. The heritability of dental arch length demonstrated similar differences between upper and lower jaw with mandible dental arch length being more genetically determined.

Conclusions. The largest genetic impact was found on the upper dental arch breadth between lateral incisors. Similar, but lower heritability is inherent for canines and first premolars of the upper jaw and first premolars of the lower jaw. It also can be noted, that arch breadths between posterior teeth show lower heritability estimates than between anterior teeth on both jaws. The dental arch in the upper jaw has more expressed genetic component than in the lower jaw.

Key words: twin study, dental arch, heritability, 3D dental cast models.

Received: 24 04 2014

Accepted for publishing: 25 03 2015

¹Clinic of Orthodontics, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania.

²Department of Health Psychology, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania.

³Institute of Biology Systems and Genetics, Veterinary Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania.

Vilma Švalkauskienė¹ – D.D.S

Kastytis Šmigelskas² – PhD, assoc. prof.

Loreta Šalomskienė³ – PhD, lecturer

Irena Andriuškevičiūtė³ – PhD, assoc. prof.

Aurelija Šalomskienė³ – M.S. Arūnas Vasiliauskas1 – D.D.S., PhD, assoc. prof.

Antanas Šidlauskas¹ – D.D.S., PhD, MOrth RCSEd, prof.

Address correspondence to Vilma Švalkauskienė, Clinic of Orthodontics, Medical Academy, Lithuanian University of Health Sciences, J. Lukšos-Daumanto g. 6, LT-50106 Kaunas, Lithuania.

E-mail address: Vilma.Svalkauskiene@lsmuni.lt



	Baltic Dental and Maxillofacial Journal

March, 2015, Vol. 17, No. 1 CONTENTS SCIENTIFIC ARTICLES Heritability estimates of dental arch parameters in Lithuanian twins Vilma Švalkauskienė, Kastytis Šmigelskas, Loreta Šalomskienė, Irena Andriuškevičiūtė, Aurelija Šalomskienė, Arūnas Vasiliauskas, Antanas Šidlauskas 3-8 Antimicrobial activity of silver and gold in toothpastes: A comparative analysis Jonas Junevičius, Juozas Žilinskas, Kęstutis Česaitis, Gabrielė Česaitienė, Darius Gleiznys, Žaneta Maželienė 9-12 A revised approach of human mastication function rehabilitation through monotypical mastication analysis Gediminas Skirbutis, Algimantas Surna, Rimantas Barauskas, Rimas Surna, Alvydas Gleiznys 13-20 REVIEWS Oral manifestations of HIV disease: A review Daiva Aškinytė, Raimonda Matulionytė, Arūnas Rimkevičius 21-28 CASE REPORTS Odontogenic maxillary sinusitis obscured by midfacial trauma Regimantas Simuntis, Ričardas Kubilius, Silvija Ryškienė, Saulius Vaitkus 29-32 © 2015 Stomatologija		Stomatologija 2015; 17 (1): 3-8 271 KB Heritability estimates of dental arch parameters in Lithuanian twins Vilma Švalkauskienė, Kastytis Šmigelskas, Loreta Šalomskienė, Irena Andriuškevičiūtė, Aurelija Šalomskienė, Arūnas Vasiliauskas, Antanas Šidlauskas Summary Background. The genetic influence on dental arch morphology may be country-specific, thus it is reasonable to check the estimates of genetics across different populations. The purpose of this study was to evaluate the heredity of dental arch morphology in the sample of Lithuanian twins with accurate zygosity determination. Material and methods. The study sample consisted of digital dental models of 40 monozygotic (MZ) and 32 dizygotic (DZ) twin pairs. The estimates of heritability (h²) for dental arch breadth and length were calculated. Results. All dental arch breadths and lengths were statistically significantly larger in men than in women. Arch length differences between genders were less expressed than largest breadth differences. In the upper jaw the largest genetic effect was found on the arch breadth between lateral incisors. The heritability of dental arch length demonstrated similar differences between upper and lower jaw with mandible dental arch length being more genetically determined. Conclusions. The largest genetic impact was found on the upper dental arch breadth between lateral incisors. Similar, but lower heritability is inherent for canines and first premolars of the upper jaw and first premolars of the lower jaw. It also can be noted, that arch breadths between posterior teeth show lower heritability estimates than between anterior teeth on both jaws. The dental arch in the upper jaw has more expressed genetic component than in the lower jaw. Key words: twin study, dental arch, heritability, 3D dental cast models. Received: 24 04 2014 Accepted for publishing: 25 03 2015 ¹Clinic of Orthodontics, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania. ²Department of Health Psychology, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania. ³Institute of Biology Systems and Genetics, Veterinary Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania. Vilma Švalkauskienė¹ – D.D.S Kastytis Šmigelskas² – PhD, assoc. prof. Loreta Šalomskienė³ – PhD, lecturer Irena Andriuškevičiūtė³ – PhD, assoc. prof. Aurelija Šalomskienė³ – M.S. Arūnas Vasiliauskas1 – D.D.S., PhD, assoc. prof. Antanas Šidlauskas¹ – D.D.S., PhD, MOrth RCSEd, prof. Address correspondence to Vilma Švalkauskienė, Clinic of Orthodontics, Medical Academy, Lithuanian University of Health Sciences, J. Lukšos-Daumanto g. 6, LT-50106 Kaunas, Lithuania. E-mail address: Vilma.Svalkauskiene@lsmuni.lt