Kirsi Pihlaja, Ville Vuollo, Mantas Sidlauskas, Virpi Harila, Antanas Sidlauskas, Loreta Salomskiene, Tuomo Heikkinen, Relations of laterality and chewing sidedness in twins, European Journal of Orthodontics, Volume 41, Issue 3, June 2019, Pages 244–249, https://doi.org/10.1093/ejo/cjy050
Relations of laterality and chewing sidedness in twins
|Author:||Pihlaja, Kirsi1; Vuollo, Ville1,2; Sidlauskas, Mantas3;|
1Unit of Oral Health Sciences, Department of Orthodontics, University of Oulu, Oulu, Finland
2Medical Research Center Oulu, Oulu University Hospital, Oulu, Finland
3Clinic of Orthodontics, Lithuanian University of Health Sciences, Kaunas, Lithuania
4Institute of Biology Systems and Genetics, Veterinary Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania
|Online Access:||PDF Full Text (PDF, 0.3 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2019062621929
Oxford University Press,
|Publish Date:|| 2019-07-05
Objectives: To study, whether there are associations between chewing side preference and other lateralities, whether there is a genetic origin for preferred chewing side (PCS), relations to sex, birth order and orthodontic treatment.
Materials and Methods: The study included 113 twin pairs, 57 pairs monozygotic, 47 pairs same sex dizygotic and 9 pairs of opposite sex. The lateralities of preferred chewing side, footedness and eyedness were assessed by functional tests and handedness was checked by asking.
Results: Right-handed, -footed and -eyed as separated groups, and true-right sided (combined), were evenly distributed by preferred chewing side. By contrast, left-handed, -footed, -eyed and non-right sided used more left or both sides when chewing. Birth order affected preferred chewing side among monozygotic: the first-born twin was more likely to have the preferred chewing side on the non-right, whereas second-born twins used right side. Gender, zygosity and orthodontic treatment were not statistically significant factors.
Limitations: Examination of chewing sidedness could have been done in several different ways to provide a definite result. Sample size of opposite sex twins was very small.
Conclusions: Preferred chewing side generally seemed to follow the side where other lateralities occur; however, monozygotic twins seemed to be more receptive to it. True-right sided were more evenly distributed than non-right sided by the preferred chewing side.
European journal of orthodontics
|Pages:||244 - 249|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
The collection of the material has been supported by European Orthodontic Society research grant.
© The Author(s) 2018. Published by Oxford University Press on behalf of the European Orthodontic Society. This is a pre-copyedited, author-produced version of an article accepted for publication in European Journal of Orthodontics following peer review. The version of record Kirsi Pihlaja, Ville Vuollo, Mantas Sidlauskas, Virpi Harila, Antanas Sidlauskas, Loreta Salomskiene, Tuomo Heikkinen, Relations of laterality and chewing sidedness in twins, European Journal of Orthodontics, Volume 41, Issue 3, June 2019, Pages 244–249 is available online at https://doi.org/10.1093/ejo/cjy050.