SCIENTIFIC ARTICLES

Multifactorial etiology of Torus mandibularis: study of twins
Adomas Auškalnis, Vygandas Rutkūnas, Olaf Bernhardt, Mantas Šidlauskas, Loreta Šalomskienė, Nomeda Basevičienė
35-40

The relationship between mandibular rotation and osseous structure of the TMJ in pre-surgery orthognathic patients: A cone beam CT study
Zane Krisjane, Ilga Urtane, Katrina Gardovska, Iveta Jankovska, Gaida Krumina
41-47

Oral health related to quality of life in patients with stomatological diseases
Carolina Amalia Barcellos Silva, Liliane Janete Grando, Sonia Maria Luckmann Fabro, Ana Lucia Schaefer Ferreira de Mello
48-53

REVIEWS

Candida albicans importance to denture wearers. A literature review
Alvydas Gleiznys, Eglė Zdanavičienė, Juozas Žilinskas
54-66

CASE REPORTS

Aspiration and Brushing Cytology in tumors and tumor-like conditions of the tongue: A Study of 27 Cases
Tamiolakis Dimitrios, Mygdakos Nikolaos, Tsamis Ioannis, Nikolaidou Sylva, Thomaidis Vasilios, Georghiou Georgios, Costopoulou Akrivi
67-72

Stomatologija 2015; 17 (2): 35-40 262 KB

Multifactorial etiology of Torus mandibularis: study of twins

Adomas Auškalnis, Vygandas Rutkūnas, Olaf Bernhardt, Mantas Šidlauskas, Loreta Šalomskienė, Nomeda Basevičienė

Summary

Objective. The aim of this study is to investigate the multifactorial etiology of mandibular tori analyzing the influence of genetics, occlusal overload, various clinical variables and their interactions.

Methods. Overall, plaster casts of 162 twins (81 twin pairs) were analyzed for the presence or absence of mandibular tori. Atypical wear facets on canine tips or incisors were recorded to diagnose bruxism. Angle Class, any kind of anterior open bite and positive, negative or flat curve of Wilson were recorded. Zygosity determination was carried out using a DNA test.

Results. Mandibular tori were found in 56.8% of the cases. In 93.6% of all monozygotic twin pairs both individuals had or did not have mandibular tori (κ=0.96±0.04; p<0.001), compared to 79.4% concordance of mandibular tori in dizygotic co-twins (κ=0.7±0.12; p<0.001). Prevalence of mandibular tori was significantly higher in the group of bruxers (67.5%) compared to non-bruxers (31.3%) (p<0.001). Significant association between mandibular tori and negative or flat curve of Wilson in the maxillary second premolars and first molars was found (OR=2.55, 95% CI (1.19-5.46), p=0.016). In all monozygotic bruxers, 97.1% showed concordance of mandibular tori presence in both co-twins compared to 78.9% dizygotic bruxers, and this difference is statistically significant (p=0.007).

Conclusion. Our results suggest that the mandibular tori are of a multifactorial origin. Mandibular tori seem to have genetic predisposition, and may be associated with teeth grinding as well as with negative or flat CW in region of maxillary second premolar and first molar.

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¹Department of Dental and Oral Diseases, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania

²Department of Prosthodontics, Institute of Odontology, Faculty of Medicine, Vilnius university, Vilnius, Lithuania

³Department of Restorative Dentistry, Periodontology and Endodontology, Center of Oral Health, University of Greifswald, Greifswald, Germany

⁴Clinic of Orthodontics, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania

⁵Institute of Biology Systems and Genetics, Veterinary Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania

Adomas Auškalnis¹ – D.D.S.

Vygandas Rutkūnas² – assoc. prof., PhD

Olaf Bernhardt³ – prof., Dr. med. dent. Habil.

Mantas Šidlauskas⁴ – D.D.S.

Loreta Šalomskienė⁵ – PhD

Nomeda Basevičienė¹ – assoc. prof., PhD

Address correspondence to Adomas Auškalnis, Department of Dental and Oral Diseases, Medical Academy, Lithuanian University of Health Sciences, Eivenių str. 2, 50009 Kaunas, Lithuania.

E-mail address: adomas.auskalnis@gmail.com